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 */
206 * Adjust bInterval for quirked devices.
207 * This quirk fixes bIntervals reported in
208 * linear microframes.
210 if (to_usb_device(ddev)->quirks &
211 USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) {
212 n = clamp(fls(d->bInterval), i, j);
216 default: /* USB_SPEED_FULL or _LOW */
217 /* For low-speed, 10 ms is the official minimum.
218 * But some "overclocked" devices might want faster
219 * polling so we'll allow it. */
223 } else if (usb_endpoint_xfer_isoc(d)) {
226 switch (to_usb_device(ddev)->speed) {
228 n = 9; /* 32 ms = 2^(9-1) uframes */
230 default: /* USB_SPEED_FULL */
231 n = 6; /* 32 ms = 2^(6-1) frames */
235 if (d->bInterval < i || d->bInterval > j) {
236 dev_warn(ddev, "config %d interface %d altsetting %d "
237 "endpoint 0x%X has an invalid bInterval %d, "
240 d->bEndpointAddress, d->bInterval, n);
241 endpoint->desc.bInterval = n;
244 /* Some buggy low-speed devices have Bulk endpoints, which is
245 * explicitly forbidden by the USB spec. In an attempt to make
246 * them usable, we will try treating them as Interrupt endpoints.
248 if (to_usb_device(ddev)->speed == USB_SPEED_LOW &&
249 usb_endpoint_xfer_bulk(d)) {
250 dev_warn(ddev, "config %d interface %d altsetting %d "
251 "endpoint 0x%X is Bulk; changing to Interrupt\n",
252 cfgno, inum, asnum, d->bEndpointAddress);
253 endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT;
254 endpoint->desc.bInterval = 1;
255 if (usb_endpoint_maxp(&endpoint->desc) > 8)
256 endpoint->desc.wMaxPacketSize = cpu_to_le16(8);
260 * Some buggy high speed devices have bulk endpoints using
261 * maxpacket sizes other than 512. High speed HCDs may not
262 * be able to handle that particular bug, so let's warn...
264 if (to_usb_device(ddev)->speed == USB_SPEED_HIGH
265 && usb_endpoint_xfer_bulk(d)) {
268 maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
270 dev_warn(ddev, "config %d interface %d altsetting %d "
271 "bulk endpoint 0x%X has invalid maxpacket %d\n",
272 cfgno, inum, asnum, d->bEndpointAddress,
276 /* Parse a possible SuperSpeed endpoint companion descriptor */
277 if (to_usb_device(ddev)->speed == USB_SPEED_SUPER)
278 usb_parse_ss_endpoint_companion(ddev, cfgno,
279 inum, asnum, endpoint, buffer, size);
281 /* Skip over any Class Specific or Vendor Specific descriptors;
282 * find the next endpoint or interface descriptor */
283 endpoint->extra = buffer;
284 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
285 USB_DT_INTERFACE, &n);
286 endpoint->extralen = i;
287 retval = buffer - buffer0 + i;
289 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
290 n, plural(n), "endpoint");
293 skip_to_next_endpoint_or_interface_descriptor:
294 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
295 USB_DT_INTERFACE, NULL);
296 return buffer - buffer0 + i;
299 void usb_release_interface_cache(struct kref *ref)
301 struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref);
304 for (j = 0; j < intfc->num_altsetting; j++) {
305 struct usb_host_interface *alt = &intfc->altsetting[j];
307 kfree(alt->endpoint);
313 static int usb_parse_interface(struct device *ddev, int cfgno,
314 struct usb_host_config *config, unsigned char *buffer, int size,
315 u8 inums[], u8 nalts[])
317 unsigned char *buffer0 = buffer;
318 struct usb_interface_descriptor *d;
320 struct usb_interface_cache *intfc;
321 struct usb_host_interface *alt;
324 int num_ep, num_ep_orig;
326 d = (struct usb_interface_descriptor *) buffer;
327 buffer += d->bLength;
330 if (d->bLength < USB_DT_INTERFACE_SIZE)
331 goto skip_to_next_interface_descriptor;
333 /* Which interface entry is this? */
335 inum = d->bInterfaceNumber;
336 for (i = 0; i < config->desc.bNumInterfaces; ++i) {
337 if (inums[i] == inum) {
338 intfc = config->intf_cache[i];
342 if (!intfc || intfc->num_altsetting >= nalts[i])
343 goto skip_to_next_interface_descriptor;
345 /* Check for duplicate altsetting entries */
346 asnum = d->bAlternateSetting;
347 for ((i = 0, alt = &intfc->altsetting[0]);
348 i < intfc->num_altsetting;
350 if (alt->desc.bAlternateSetting == asnum) {
351 dev_warn(ddev, "Duplicate descriptor for config %d "
352 "interface %d altsetting %d, skipping\n",
354 goto skip_to_next_interface_descriptor;
358 ++intfc->num_altsetting;
359 memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE);
361 /* Skip over any Class Specific or Vendor Specific descriptors;
362 * find the first endpoint or interface descriptor */
364 i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
365 USB_DT_INTERFACE, &n);
368 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
369 n, plural(n), "interface");
373 /* Allocate space for the right(?) number of endpoints */
374 num_ep = num_ep_orig = alt->desc.bNumEndpoints;
375 alt->desc.bNumEndpoints = 0; /* Use as a counter */
376 if (num_ep > USB_MAXENDPOINTS) {
377 dev_warn(ddev, "too many endpoints for config %d interface %d "
378 "altsetting %d: %d, using maximum allowed: %d\n",
379 cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS);
380 num_ep = USB_MAXENDPOINTS;
384 /* Can't allocate 0 bytes */
385 len = sizeof(struct usb_host_endpoint) * num_ep;
386 alt->endpoint = kzalloc(len, GFP_KERNEL);
391 /* Parse all the endpoint descriptors */
394 if (((struct usb_descriptor_header *) buffer)->bDescriptorType
397 retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt,
398 num_ep, buffer, size);
407 if (n != num_ep_orig)
408 dev_warn(ddev, "config %d interface %d altsetting %d has %d "
409 "endpoint descriptor%s, different from the interface "
410 "descriptor's value: %d\n",
411 cfgno, inum, asnum, n, plural(n), num_ep_orig);
412 return buffer - buffer0;
414 skip_to_next_interface_descriptor:
415 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
416 USB_DT_INTERFACE, NULL);
417 return buffer - buffer0 + i;
420 static int usb_parse_configuration(struct usb_device *dev, int cfgidx,
421 struct usb_host_config *config, unsigned char *buffer, int size)
423 struct device *ddev = &dev->dev;
424 unsigned char *buffer0 = buffer;
426 int nintf, nintf_orig;
428 struct usb_interface_cache *intfc;
429 unsigned char *buffer2;
431 struct usb_descriptor_header *header;
433 u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES];
434 unsigned iad_num = 0;
436 memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE);
437 if (config->desc.bDescriptorType != USB_DT_CONFIG ||
438 config->desc.bLength < USB_DT_CONFIG_SIZE ||
439 config->desc.bLength > size) {
440 dev_err(ddev, "invalid descriptor for config index %d: "
441 "type = 0x%X, length = %d\n", cfgidx,
442 config->desc.bDescriptorType, config->desc.bLength);
445 cfgno = config->desc.bConfigurationValue;
447 buffer += config->desc.bLength;
448 size -= config->desc.bLength;
450 nintf = nintf_orig = config->desc.bNumInterfaces;
451 if (nintf > USB_MAXINTERFACES) {
452 dev_warn(ddev, "config %d has too many interfaces: %d, "
453 "using maximum allowed: %d\n",
454 cfgno, nintf, USB_MAXINTERFACES);
455 nintf = USB_MAXINTERFACES;
458 /* Go through the descriptors, checking their length and counting the
459 * number of altsettings for each interface */
461 for ((buffer2 = buffer, size2 = size);
463 (buffer2 += header->bLength, size2 -= header->bLength)) {
465 if (size2 < sizeof(struct usb_descriptor_header)) {
466 dev_warn(ddev, "config %d descriptor has %d excess "
467 "byte%s, ignoring\n",
468 cfgno, size2, plural(size2));
472 header = (struct usb_descriptor_header *) buffer2;
473 if ((header->bLength > size2) || (header->bLength < 2)) {
474 dev_warn(ddev, "config %d has an invalid descriptor "
475 "of length %d, skipping remainder of the config\n",
476 cfgno, header->bLength);
480 if (header->bDescriptorType == USB_DT_INTERFACE) {
481 struct usb_interface_descriptor *d;
484 d = (struct usb_interface_descriptor *) header;
485 if (d->bLength < USB_DT_INTERFACE_SIZE) {
486 dev_warn(ddev, "config %d has an invalid "
487 "interface descriptor of length %d, "
488 "skipping\n", cfgno, d->bLength);
492 inum = d->bInterfaceNumber;
494 if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) &&
496 dev_warn(ddev, "config %d has more interface "
497 "descriptors, than it declares in "
498 "bNumInterfaces, ignoring interface "
499 "number: %d\n", cfgno, inum);
503 if (inum >= nintf_orig)
504 dev_warn(ddev, "config %d has an invalid "
505 "interface number: %d but max is %d\n",
506 cfgno, inum, nintf_orig - 1);
508 /* Have we already encountered this interface?
509 * Count its altsettings */
510 for (i = 0; i < n; ++i) {
511 if (inums[i] == inum)
517 } else if (n < USB_MAXINTERFACES) {
523 } else if (header->bDescriptorType ==
524 USB_DT_INTERFACE_ASSOCIATION) {
525 if (iad_num == USB_MAXIADS) {
526 dev_warn(ddev, "found more Interface "
527 "Association Descriptors "
528 "than allocated for in "
529 "configuration %d\n", cfgno);
531 config->intf_assoc[iad_num] =
532 (struct usb_interface_assoc_descriptor
537 } else if (header->bDescriptorType == USB_DT_DEVICE ||
538 header->bDescriptorType == USB_DT_CONFIG)
539 dev_warn(ddev, "config %d contains an unexpected "
540 "descriptor of type 0x%X, skipping\n",
541 cfgno, header->bDescriptorType);
543 } /* for ((buffer2 = buffer, size2 = size); ...) */
544 size = buffer2 - buffer;
545 config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0);
548 dev_warn(ddev, "config %d has %d interface%s, different from "
549 "the descriptor's value: %d\n",
550 cfgno, n, plural(n), nintf_orig);
552 dev_warn(ddev, "config %d has no interfaces?\n", cfgno);
553 config->desc.bNumInterfaces = nintf = n;
555 /* Check for missing interface numbers */
556 for (i = 0; i < nintf; ++i) {
557 for (j = 0; j < nintf; ++j) {
562 dev_warn(ddev, "config %d has no interface number "
566 /* Allocate the usb_interface_caches and altsetting arrays */
567 for (i = 0; i < nintf; ++i) {
569 if (j > USB_MAXALTSETTING) {
570 dev_warn(ddev, "too many alternate settings for "
571 "config %d interface %d: %d, "
572 "using maximum allowed: %d\n",
573 cfgno, inums[i], j, USB_MAXALTSETTING);
574 nalts[i] = j = USB_MAXALTSETTING;
577 len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j;
578 config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL);
581 kref_init(&intfc->ref);
584 /* FIXME: parse the BOS descriptor */
586 /* Skip over any Class Specific or Vendor Specific descriptors;
587 * find the first interface descriptor */
588 config->extra = buffer;
589 i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
590 USB_DT_INTERFACE, &n);
591 config->extralen = i;
593 dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
594 n, plural(n), "configuration");
598 /* Parse all the interface/altsetting descriptors */
600 retval = usb_parse_interface(ddev, cfgno, config,
601 buffer, size, inums, nalts);
609 /* Check for missing altsettings */
610 for (i = 0; i < nintf; ++i) {
611 intfc = config->intf_cache[i];
612 for (j = 0; j < intfc->num_altsetting; ++j) {
613 for (n = 0; n < intfc->num_altsetting; ++n) {
614 if (intfc->altsetting[n].desc.
615 bAlternateSetting == j)
618 if (n >= intfc->num_altsetting)
619 dev_warn(ddev, "config %d interface %d has no "
620 "altsetting %d\n", cfgno, inums[i], j);
627 /* hub-only!! ... and only exported for reset/reinit path.
628 * otherwise used internally on disconnect/destroy path
630 void usb_destroy_configuration(struct usb_device *dev)
637 if (dev->rawdescriptors) {
638 for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
639 kfree(dev->rawdescriptors[i]);
641 kfree(dev->rawdescriptors);
642 dev->rawdescriptors = NULL;
645 for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
646 struct usb_host_config *cf = &dev->config[c];
649 for (i = 0; i < cf->desc.bNumInterfaces; i++) {
650 if (cf->intf_cache[i])
651 kref_put(&cf->intf_cache[i]->ref,
652 usb_release_interface_cache);
661 * Get the USB config descriptors, cache and parse'em
663 * hub-only!! ... and only in reset path, or usb_new_device()
664 * (used by real hubs and virtual root hubs)
666 * NOTE: if this is a WUSB device and is not authorized, we skip the
667 * whole thing. A non-authorized USB device has no
670 int usb_get_configuration(struct usb_device *dev)
672 struct device *ddev = &dev->dev;
673 int ncfg = dev->descriptor.bNumConfigurations;
675 unsigned int cfgno, length;
676 unsigned char *bigbuffer;
677 struct usb_config_descriptor *desc;
680 if (dev->authorized == 0) /* Not really an error */
681 goto out_not_authorized;
683 if (ncfg > USB_MAXCONFIG) {
684 dev_warn(ddev, "too many configurations: %d, "
685 "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG);
686 dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG;
690 dev_err(ddev, "no configurations\n");
694 length = ncfg * sizeof(struct usb_host_config);
695 dev->config = kzalloc(length, GFP_KERNEL);
699 length = ncfg * sizeof(char *);
700 dev->rawdescriptors = kzalloc(length, GFP_KERNEL);
701 if (!dev->rawdescriptors)
704 desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
709 for (; cfgno < ncfg; cfgno++) {
710 /* We grab just the first descriptor so we know how long
711 * the whole configuration is */
712 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
713 desc, USB_DT_CONFIG_SIZE);
715 dev_err(ddev, "unable to read config index %d "
716 "descriptor/%s: %d\n", cfgno, "start", result);
717 dev_err(ddev, "chopping to %d config(s)\n", cfgno);
718 dev->descriptor.bNumConfigurations = cfgno;
720 } else if (result < 4) {
721 dev_err(ddev, "config index %d descriptor too short "
722 "(expected %i, got %i)\n", cfgno,
723 USB_DT_CONFIG_SIZE, result);
727 length = max((int) le16_to_cpu(desc->wTotalLength),
730 /* Now that we know the length, get the whole thing */
731 bigbuffer = kmalloc(length, GFP_KERNEL);
737 if (dev->quirks & USB_QUIRK_DELAY_INIT)
740 result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
743 dev_err(ddev, "unable to read config index %d "
744 "descriptor/%s\n", cfgno, "all");
748 if (result < length) {
749 dev_warn(ddev, "config index %d descriptor too short "
750 "(expected %i, got %i)\n", cfgno, length, result);
754 dev->rawdescriptors[cfgno] = bigbuffer;
756 result = usb_parse_configuration(dev, cfgno,
757 &dev->config[cfgno], bigbuffer, length);
768 dev->descriptor.bNumConfigurations = cfgno;
770 if (result == -ENOMEM)
771 dev_err(ddev, "out of memory\n");
775 void usb_release_bos_descriptor(struct usb_device *dev)
778 kfree(dev->bos->desc);
784 /* Get BOS descriptor set */
785 int usb_get_bos_descriptor(struct usb_device *dev)
787 struct device *ddev = &dev->dev;
788 struct usb_bos_descriptor *bos;
789 struct usb_dev_cap_header *cap;
790 unsigned char *buffer;
791 int length, total_len, num, i;
794 bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL);
798 /* Get BOS descriptor */
799 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
800 if (ret < USB_DT_BOS_SIZE) {
801 dev_err(ddev, "unable to get BOS descriptor\n");
808 length = bos->bLength;
809 total_len = le16_to_cpu(bos->wTotalLength);
810 num = bos->bNumDeviceCaps;
812 if (total_len < length)
815 dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL);
819 /* Now let's get the whole BOS descriptor set */
820 buffer = kzalloc(total_len, GFP_KERNEL);
825 dev->bos->desc = (struct usb_bos_descriptor *)buffer;
827 ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len);
828 if (ret < total_len) {
829 dev_err(ddev, "unable to get BOS descriptor set\n");
836 for (i = 0; i < num; i++) {
838 cap = (struct usb_dev_cap_header *)buffer;
839 length = cap->bLength;
841 if (total_len < length)
845 if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
846 dev_warn(ddev, "descriptor type invalid, skip\n");
850 switch (cap->bDevCapabilityType) {
851 case USB_CAP_TYPE_WIRELESS_USB:
852 /* Wireless USB cap descriptor is handled by wusb */
854 case USB_CAP_TYPE_EXT:
856 (struct usb_ext_cap_descriptor *)buffer;
858 case USB_SS_CAP_TYPE:
860 (struct usb_ss_cap_descriptor *)buffer;
862 case CONTAINER_ID_TYPE:
864 (struct usb_ss_container_id_descriptor *)buffer;
874 usb_release_bos_descriptor(dev);