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
dev_err(ddev, "invalid descriptor for config index %d: "
429
"type = 0x%X, length = %d\n", cfgidx,
430
config->desc.bDescriptorType, config->desc.bLength);
433
cfgno = config->desc.bConfigurationValue;
435
buffer += config->desc.bLength;
436
size -= config->desc.bLength;
438
nintf = nintf_orig = config->desc.bNumInterfaces;
439
if (nintf > USB_MAXINTERFACES) {
440
dev_warn(ddev, "config %d has too many interfaces: %d, "
441
"using maximum allowed: %d\n",
442
cfgno, nintf, USB_MAXINTERFACES);
443
nintf = USB_MAXINTERFACES;
446
/* Go through the descriptors, checking their length and counting the
447
* number of altsettings for each interface */
449
for ((buffer2 = buffer, size2 = size);
451
(buffer2 += header->bLength, size2 -= header->bLength)) {
453
if (size2 < sizeof(struct usb_descriptor_header)) {
454
dev_warn(ddev, "config %d descriptor has %d excess "
455
"byte%s, ignoring\n",
456
cfgno, size2, plural(size2));
460
header = (struct usb_descriptor_header *) buffer2;
461
if ((header->bLength > size2) || (header->bLength < 2)) {
462
dev_warn(ddev, "config %d has an invalid descriptor "
463
"of length %d, skipping remainder of the config\n",
464
cfgno, header->bLength);
468
if (header->bDescriptorType == USB_DT_INTERFACE) {
469
struct usb_interface_descriptor *d;
472
d = (struct usb_interface_descriptor *) header;
473
if (d->bLength < USB_DT_INTERFACE_SIZE) {
474
dev_warn(ddev, "config %d has an invalid "
475
"interface descriptor of length %d, "
476
"skipping\n", cfgno, d->bLength);
480
inum = d->bInterfaceNumber;
482
if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) &&
484
dev_warn(ddev, "config %d has more interface "
485
"descriptors, than it declares in "
486
"bNumInterfaces, ignoring interface "
487
"number: %d\n", cfgno, inum);
491
if (inum >= nintf_orig)
492
dev_warn(ddev, "config %d has an invalid "
493
"interface number: %d but max is %d\n",
494
cfgno, inum, nintf_orig - 1);
496
/* Have we already encountered this interface?
497
* Count its altsettings */
498
for (i = 0; i < n; ++i) {
499
if (inums[i] == inum)
505
} else if (n < USB_MAXINTERFACES) {
511
} else if (header->bDescriptorType ==
512
USB_DT_INTERFACE_ASSOCIATION) {
513
if (iad_num == USB_MAXIADS) {
514
dev_warn(ddev, "found more Interface "
515
"Association Descriptors "
516
"than allocated for in "
517
"configuration %d\n", cfgno);
519
config->intf_assoc[iad_num] =
520
(struct usb_interface_assoc_descriptor
525
} else if (header->bDescriptorType == USB_DT_DEVICE ||
526
header->bDescriptorType == USB_DT_CONFIG)
527
dev_warn(ddev, "config %d contains an unexpected "
528
"descriptor of type 0x%X, skipping\n",
529
cfgno, header->bDescriptorType);
531
} /* for ((buffer2 = buffer, size2 = size); ...) */
532
size = buffer2 - buffer;
533
config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0);
536
dev_warn(ddev, "config %d has %d interface%s, different from "
537
"the descriptor's value: %d\n",
538
cfgno, n, plural(n), nintf_orig);
540
dev_warn(ddev, "config %d has no interfaces?\n", cfgno);
541
config->desc.bNumInterfaces = nintf = n;
543
/* Check for missing interface numbers */
544
for (i = 0; i < nintf; ++i) {
545
for (j = 0; j < nintf; ++j) {
550
dev_warn(ddev, "config %d has no interface number "
554
/* Allocate the usb_interface_caches and altsetting arrays */
555
for (i = 0; i < nintf; ++i) {
557
if (j > USB_MAXALTSETTING) {
558
dev_warn(ddev, "too many alternate settings for "
559
"config %d interface %d: %d, "
560
"using maximum allowed: %d\n",
561
cfgno, inums[i], j, USB_MAXALTSETTING);
562
nalts[i] = j = USB_MAXALTSETTING;
565
len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j;
566
config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL);
569
kref_init(&intfc->ref);
572
/* FIXME: parse the BOS descriptor */
574
/* Skip over any Class Specific or Vendor Specific descriptors;
575
* find the first interface descriptor */
576
config->extra = buffer;
577
i = find_next_descriptor(buffer, size, USB_DT_INTERFACE,
578
USB_DT_INTERFACE, &n);
579
config->extralen = i;
581
dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
582
n, plural(n), "configuration");
586
/* Parse all the interface/altsetting descriptors */
588
retval = usb_parse_interface(ddev, cfgno, config,
589
buffer, size, inums, nalts);
597
/* Check for missing altsettings */
598
for (i = 0; i < nintf; ++i) {
599
intfc = config->intf_cache[i];
600
for (j = 0; j < intfc->num_altsetting; ++j) {
601
for (n = 0; n < intfc->num_altsetting; ++n) {
602
if (intfc->altsetting[n].desc.
603
bAlternateSetting == j)
606
if (n >= intfc->num_altsetting)
607
dev_warn(ddev, "config %d interface %d has no "
608
"altsetting %d\n", cfgno, inums[i], j);
615
/* hub-only!! ... and only exported for reset/reinit path.
616
* otherwise used internally on disconnect/destroy path
618
void usb_destroy_configuration(struct usb_device *dev)
625
if (dev->rawdescriptors) {
626
for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
627
kfree(dev->rawdescriptors[i]);
629
kfree(dev->rawdescriptors);
630
dev->rawdescriptors = NULL;
633
for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
634
struct usb_host_config *cf = &dev->config[c];
637
for (i = 0; i < cf->desc.bNumInterfaces; i++) {
638
if (cf->intf_cache[i])
639
kref_put(&cf->intf_cache[i]->ref,
640
usb_release_interface_cache);
649
* Get the USB config descriptors, cache and parse'em
651
* hub-only!! ... and only in reset path, or usb_new_device()
652
* (used by real hubs and virtual root hubs)
654
* NOTE: if this is a WUSB device and is not authorized, we skip the
655
* whole thing. A non-authorized USB device has no
658
int usb_get_configuration(struct usb_device *dev)
660
struct device *ddev = &dev->dev;
661
int ncfg = dev->descriptor.bNumConfigurations;
663
unsigned int cfgno, length;
664
unsigned char *bigbuffer;
665
struct usb_config_descriptor *desc;
668
if (dev->authorized == 0) /* Not really an error */
669
goto out_not_authorized;
671
if (ncfg > USB_MAXCONFIG) {
672
dev_warn(ddev, "too many configurations: %d, "
673
"using maximum allowed: %d\n", ncfg, USB_MAXCONFIG);
674
dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG;
678
dev_err(ddev, "no configurations\n");
682
length = ncfg * sizeof(struct usb_host_config);
683
dev->config = kzalloc(length, GFP_KERNEL);
687
length = ncfg * sizeof(char *);
688
dev->rawdescriptors = kzalloc(length, GFP_KERNEL);
689
if (!dev->rawdescriptors)
692
desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL);
697
for (; cfgno < ncfg; cfgno++) {
698
/* We grab just the first descriptor so we know how long
699
* the whole configuration is */
700
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
701
desc, USB_DT_CONFIG_SIZE);
703
dev_err(ddev, "unable to read config index %d "
704
"descriptor/%s: %d\n", cfgno, "start", result);
705
dev_err(ddev, "chopping to %d config(s)\n", cfgno);
706
dev->descriptor.bNumConfigurations = cfgno;
708
} else if (result < 4) {
709
dev_err(ddev, "config index %d descriptor too short "
710
"(expected %i, got %i)\n", cfgno,
711
USB_DT_CONFIG_SIZE, result);
715
length = max((int) le16_to_cpu(desc->wTotalLength),
718
/* Now that we know the length, get the whole thing */
719
bigbuffer = kmalloc(length, GFP_KERNEL);
724
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno,
727
dev_err(ddev, "unable to read config index %d "
728
"descriptor/%s\n", cfgno, "all");
732
if (result < length) {
733
dev_warn(ddev, "config index %d descriptor too short "
734
"(expected %i, got %i)\n", cfgno, length, result);
738
dev->rawdescriptors[cfgno] = bigbuffer;
740
result = usb_parse_configuration(dev, cfgno,
741
&dev->config[cfgno], bigbuffer, length);
752
dev->descriptor.bNumConfigurations = cfgno;
754
if (result == -ENOMEM)
755
dev_err(ddev, "out of memory\n");
759
void usb_release_bos_descriptor(struct usb_device *dev)
762
kfree(dev->bos->desc);
768
/* Get BOS descriptor set */
769
int usb_get_bos_descriptor(struct usb_device *dev)
771
struct device *ddev = &dev->dev;
772
struct usb_bos_descriptor *bos;
773
struct usb_dev_cap_header *cap;
774
unsigned char *buffer;
775
int length, total_len, num, i;
778
bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL);
782
/* Get BOS descriptor */
783
ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE);
784
if (ret < USB_DT_BOS_SIZE) {
785
dev_err(ddev, "unable to get BOS descriptor\n");
792
length = bos->bLength;
793
total_len = le16_to_cpu(bos->wTotalLength);
794
num = bos->bNumDeviceCaps;
796
if (total_len < length)
799
dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL);
803
/* Now let's get the whole BOS descriptor set */
804
buffer = kzalloc(total_len, GFP_KERNEL);
809
dev->bos->desc = (struct usb_bos_descriptor *)buffer;
811
ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len);
812
if (ret < total_len) {
813
dev_err(ddev, "unable to get BOS descriptor set\n");
820
for (i = 0; i < num; i++) {
822
cap = (struct usb_dev_cap_header *)buffer;
823
length = cap->bLength;
825
if (total_len < length)
829
if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) {
830
dev_warn(ddev, "descriptor type invalid, skip\n");
834
switch (cap->bDevCapabilityType) {
835
case USB_CAP_TYPE_WIRELESS_USB:
836
/* Wireless USB cap descriptor is handled by wusb */
838
case USB_CAP_TYPE_EXT:
840
(struct usb_ext_cap_descriptor *)buffer;
842
case USB_SS_CAP_TYPE:
844
(struct usb_ss_cap_descriptor *)buffer;
846
case CONTAINER_ID_TYPE:
848
(struct usb_ss_container_id_descriptor *)buffer;
858
usb_release_bos_descriptor(dev);