]>
Commit | Line | Data |
---|---|---|
aa1f3bb5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
b65fba3d GKH |
2 | /* |
3 | * Released under the GPLv2 only. | |
b65fba3d GKH |
4 | */ |
5 | ||
1da177e4 | 6 | #include <linux/usb.h> |
615ae11b | 7 | #include <linux/usb/ch9.h> |
27729aad | 8 | #include <linux/usb/hcd.h> |
317149c6 | 9 | #include <linux/usb/quirks.h> |
1da177e4 | 10 | #include <linux/module.h> |
1da177e4 LT |
11 | #include <linux/slab.h> |
12 | #include <linux/device.h> | |
13 | #include <asm/byteorder.h> | |
6d5e8254 | 14 | #include "usb.h" |
27729aad | 15 | |
1da177e4 LT |
16 | |
17 | #define USB_MAXALTSETTING 128 /* Hard limit */ | |
1da177e4 LT |
18 | |
19 | #define USB_MAXCONFIG 8 /* Arbitrary limit */ | |
20 | ||
21 | ||
22 | static inline const char *plural(int n) | |
23 | { | |
24 | return (n == 1 ? "" : "s"); | |
25 | } | |
26 | ||
27 | static int find_next_descriptor(unsigned char *buffer, int size, | |
28 | int dt1, int dt2, int *num_skipped) | |
29 | { | |
30 | struct usb_descriptor_header *h; | |
31 | int n = 0; | |
32 | unsigned char *buffer0 = buffer; | |
33 | ||
34 | /* Find the next descriptor of type dt1 or dt2 */ | |
35 | while (size > 0) { | |
36 | h = (struct usb_descriptor_header *) buffer; | |
37 | if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2) | |
38 | break; | |
39 | buffer += h->bLength; | |
40 | size -= h->bLength; | |
41 | ++n; | |
42 | } | |
43 | ||
44 | /* Store the number of descriptors skipped and return the | |
45 | * number of bytes skipped */ | |
46 | if (num_skipped) | |
47 | *num_skipped = n; | |
48 | return buffer - buffer0; | |
49 | } | |
50 | ||
b37d83a6 MN |
51 | static void usb_parse_ssp_isoc_endpoint_companion(struct device *ddev, |
52 | int cfgno, int inum, int asnum, struct usb_host_endpoint *ep, | |
53 | unsigned char *buffer, int size) | |
54 | { | |
55 | struct usb_ssp_isoc_ep_comp_descriptor *desc; | |
56 | ||
57 | /* | |
58 | * The SuperSpeedPlus Isoc endpoint companion descriptor immediately | |
59 | * follows the SuperSpeed Endpoint Companion descriptor | |
60 | */ | |
61 | desc = (struct usb_ssp_isoc_ep_comp_descriptor *) buffer; | |
62 | if (desc->bDescriptorType != USB_DT_SSP_ISOC_ENDPOINT_COMP || | |
63 | size < USB_DT_SSP_ISOC_EP_COMP_SIZE) { | |
64 | dev_warn(ddev, "Invalid SuperSpeedPlus isoc endpoint companion" | |
65 | "for config %d interface %d altsetting %d ep %d.\n", | |
66 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
67 | return; | |
68 | } | |
69 | memcpy(&ep->ssp_isoc_ep_comp, desc, USB_DT_SSP_ISOC_EP_COMP_SIZE); | |
70 | } | |
71 | ||
842f1690 | 72 | static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, |
663c30d0 | 73 | int inum, int asnum, struct usb_host_endpoint *ep, |
842f1690 | 74 | unsigned char *buffer, int size) |
663c30d0 | 75 | { |
842f1690 | 76 | struct usb_ss_ep_comp_descriptor *desc; |
663c30d0 | 77 | int max_tx; |
663c30d0 | 78 | |
842f1690 AS |
79 | /* The SuperSpeed endpoint companion descriptor is supposed to |
80 | * be the first thing immediately following the endpoint descriptor. | |
81 | */ | |
f0058c62 | 82 | desc = (struct usb_ss_ep_comp_descriptor *) buffer; |
b37d83a6 | 83 | |
842f1690 AS |
84 | if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP || |
85 | size < USB_DT_SS_EP_COMP_SIZE) { | |
663c30d0 SS |
86 | dev_warn(ddev, "No SuperSpeed endpoint companion for config %d " |
87 | " interface %d altsetting %d ep %d: " | |
88 | "using minimum values\n", | |
89 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
90 | |
91 | /* Fill in some default values. | |
92 | * Leave bmAttributes as zero, which will mean no streams for | |
93 | * bulk, and isoc won't support multiple bursts of packets. | |
94 | * With bursts of only one packet, and a Mult of 1, the max | |
95 | * amount of data moved per endpoint service interval is one | |
96 | * packet. | |
663c30d0 | 97 | */ |
842f1690 AS |
98 | ep->ss_ep_comp.bLength = USB_DT_SS_EP_COMP_SIZE; |
99 | ep->ss_ep_comp.bDescriptorType = USB_DT_SS_ENDPOINT_COMP; | |
100 | if (usb_endpoint_xfer_isoc(&ep->desc) || | |
101 | usb_endpoint_xfer_int(&ep->desc)) | |
102 | ep->ss_ep_comp.wBytesPerInterval = | |
103 | ep->desc.wMaxPacketSize; | |
104 | return; | |
663c30d0 | 105 | } |
59b9023c MN |
106 | buffer += desc->bLength; |
107 | size -= desc->bLength; | |
842f1690 | 108 | memcpy(&ep->ss_ep_comp, desc, USB_DT_SS_EP_COMP_SIZE); |
663c30d0 SS |
109 | |
110 | /* Check the various values */ | |
111 | if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) { | |
112 | dev_warn(ddev, "Control endpoint with bMaxBurst = %d in " | |
113 | "config %d interface %d altsetting %d ep %d: " | |
114 | "setting to zero\n", desc->bMaxBurst, | |
115 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
116 | ep->ss_ep_comp.bMaxBurst = 0; |
117 | } else if (desc->bMaxBurst > 15) { | |
663c30d0 SS |
118 | dev_warn(ddev, "Endpoint with bMaxBurst = %d in " |
119 | "config %d interface %d altsetting %d ep %d: " | |
120 | "setting to 15\n", desc->bMaxBurst, | |
121 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 | 122 | ep->ss_ep_comp.bMaxBurst = 15; |
663c30d0 | 123 | } |
842f1690 AS |
124 | |
125 | if ((usb_endpoint_xfer_control(&ep->desc) || | |
126 | usb_endpoint_xfer_int(&ep->desc)) && | |
127 | desc->bmAttributes != 0) { | |
663c30d0 SS |
128 | dev_warn(ddev, "%s endpoint with bmAttributes = %d in " |
129 | "config %d interface %d altsetting %d ep %d: " | |
130 | "setting to zero\n", | |
131 | usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk", | |
132 | desc->bmAttributes, | |
133 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
134 | ep->ss_ep_comp.bmAttributes = 0; |
135 | } else if (usb_endpoint_xfer_bulk(&ep->desc) && | |
136 | desc->bmAttributes > 16) { | |
663c30d0 SS |
137 | dev_warn(ddev, "Bulk endpoint with more than 65536 streams in " |
138 | "config %d interface %d altsetting %d ep %d: " | |
139 | "setting to max\n", | |
140 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
141 | ep->ss_ep_comp.bmAttributes = 16; |
142 | } else if (usb_endpoint_xfer_isoc(&ep->desc) && | |
b37d83a6 | 143 | !USB_SS_SSP_ISOC_COMP(desc->bmAttributes) && |
ff30cbc8 | 144 | USB_SS_MULT(desc->bmAttributes) > 3) { |
663c30d0 SS |
145 | dev_warn(ddev, "Isoc endpoint has Mult of %d in " |
146 | "config %d interface %d altsetting %d ep %d: " | |
5377adb0 BH |
147 | "setting to 3\n", |
148 | USB_SS_MULT(desc->bmAttributes), | |
663c30d0 | 149 | cfgno, inum, asnum, ep->desc.bEndpointAddress); |
842f1690 | 150 | ep->ss_ep_comp.bmAttributes = 2; |
663c30d0 | 151 | } |
842f1690 AS |
152 | |
153 | if (usb_endpoint_xfer_isoc(&ep->desc)) | |
ff30cbc8 MN |
154 | max_tx = (desc->bMaxBurst + 1) * |
155 | (USB_SS_MULT(desc->bmAttributes)) * | |
29cc8897 | 156 | usb_endpoint_maxp(&ep->desc); |
842f1690 | 157 | else if (usb_endpoint_xfer_int(&ep->desc)) |
29cc8897 | 158 | max_tx = usb_endpoint_maxp(&ep->desc) * |
7de7c7d2 | 159 | (desc->bMaxBurst + 1); |
842f1690 AS |
160 | else |
161 | max_tx = 999999; | |
64b3c304 | 162 | if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) { |
663c30d0 SS |
163 | dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in " |
164 | "config %d interface %d altsetting %d ep %d: " | |
165 | "setting to %d\n", | |
166 | usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int", | |
7de7c7d2 | 167 | le16_to_cpu(desc->wBytesPerInterval), |
663c30d0 SS |
168 | cfgno, inum, asnum, ep->desc.bEndpointAddress, |
169 | max_tx); | |
7de7c7d2 | 170 | ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx); |
663c30d0 | 171 | } |
59b9023c MN |
172 | /* Parse a possible SuperSpeedPlus isoc ep companion descriptor */ |
173 | if (usb_endpoint_xfer_isoc(&ep->desc) && | |
174 | USB_SS_SSP_ISOC_COMP(desc->bmAttributes)) | |
175 | usb_parse_ssp_isoc_endpoint_companion(ddev, cfgno, inum, asnum, | |
176 | ep, buffer, size); | |
663c30d0 SS |
177 | } |
178 | ||
aed9d65a AS |
179 | static const unsigned short low_speed_maxpacket_maxes[4] = { |
180 | [USB_ENDPOINT_XFER_CONTROL] = 8, | |
181 | [USB_ENDPOINT_XFER_ISOC] = 0, | |
182 | [USB_ENDPOINT_XFER_BULK] = 0, | |
183 | [USB_ENDPOINT_XFER_INT] = 8, | |
184 | }; | |
185 | static const unsigned short full_speed_maxpacket_maxes[4] = { | |
186 | [USB_ENDPOINT_XFER_CONTROL] = 64, | |
187 | [USB_ENDPOINT_XFER_ISOC] = 1023, | |
188 | [USB_ENDPOINT_XFER_BULK] = 64, | |
189 | [USB_ENDPOINT_XFER_INT] = 64, | |
190 | }; | |
191 | static const unsigned short high_speed_maxpacket_maxes[4] = { | |
192 | [USB_ENDPOINT_XFER_CONTROL] = 64, | |
193 | [USB_ENDPOINT_XFER_ISOC] = 1024, | |
194 | [USB_ENDPOINT_XFER_BULK] = 512, | |
6c73358c | 195 | [USB_ENDPOINT_XFER_INT] = 1024, |
aed9d65a AS |
196 | }; |
197 | static const unsigned short super_speed_maxpacket_maxes[4] = { | |
198 | [USB_ENDPOINT_XFER_CONTROL] = 512, | |
199 | [USB_ENDPOINT_XFER_ISOC] = 1024, | |
200 | [USB_ENDPOINT_XFER_BULK] = 1024, | |
201 | [USB_ENDPOINT_XFER_INT] = 1024, | |
202 | }; | |
203 | ||
1da177e4 LT |
204 | static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum, |
205 | int asnum, struct usb_host_interface *ifp, int num_ep, | |
206 | unsigned char *buffer, int size) | |
207 | { | |
208 | unsigned char *buffer0 = buffer; | |
209 | struct usb_endpoint_descriptor *d; | |
210 | struct usb_host_endpoint *endpoint; | |
663c30d0 | 211 | int n, i, j, retval; |
aed9d65a AS |
212 | unsigned int maxp; |
213 | const unsigned short *maxpacket_maxes; | |
1da177e4 LT |
214 | |
215 | d = (struct usb_endpoint_descriptor *) buffer; | |
216 | buffer += d->bLength; | |
217 | size -= d->bLength; | |
218 | ||
219 | if (d->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE) | |
220 | n = USB_DT_ENDPOINT_AUDIO_SIZE; | |
221 | else if (d->bLength >= USB_DT_ENDPOINT_SIZE) | |
222 | n = USB_DT_ENDPOINT_SIZE; | |
223 | else { | |
224 | dev_warn(ddev, "config %d interface %d altsetting %d has an " | |
225 | "invalid endpoint descriptor of length %d, skipping\n", | |
226 | cfgno, inum, asnum, d->bLength); | |
227 | goto skip_to_next_endpoint_or_interface_descriptor; | |
228 | } | |
229 | ||
230 | i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK; | |
231 | if (i >= 16 || i == 0) { | |
232 | dev_warn(ddev, "config %d interface %d altsetting %d has an " | |
233 | "invalid endpoint with address 0x%X, skipping\n", | |
234 | cfgno, inum, asnum, d->bEndpointAddress); | |
235 | goto skip_to_next_endpoint_or_interface_descriptor; | |
236 | } | |
237 | ||
238 | /* Only store as many endpoints as we have room for */ | |
239 | if (ifp->desc.bNumEndpoints >= num_ep) | |
240 | goto skip_to_next_endpoint_or_interface_descriptor; | |
241 | ||
0a8fd134 AS |
242 | /* Check for duplicate endpoint addresses */ |
243 | for (i = 0; i < ifp->desc.bNumEndpoints; ++i) { | |
244 | if (ifp->endpoint[i].desc.bEndpointAddress == | |
245 | d->bEndpointAddress) { | |
246 | dev_warn(ddev, "config %d interface %d altsetting %d has a duplicate endpoint with address 0x%X, skipping\n", | |
247 | cfgno, inum, asnum, d->bEndpointAddress); | |
248 | goto skip_to_next_endpoint_or_interface_descriptor; | |
249 | } | |
250 | } | |
251 | ||
1da177e4 LT |
252 | endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints]; |
253 | ++ifp->desc.bNumEndpoints; | |
254 | ||
255 | memcpy(&endpoint->desc, d, n); | |
256 | INIT_LIST_HEAD(&endpoint->urb_list); | |
257 | ||
08c5cd37 AS |
258 | /* |
259 | * Fix up bInterval values outside the legal range. | |
260 | * Use 10 or 8 ms if no proper value can be guessed. | |
261 | */ | |
615ae11b AS |
262 | i = 0; /* i = min, j = max, n = default */ |
263 | j = 255; | |
264 | if (usb_endpoint_xfer_int(d)) { | |
265 | i = 1; | |
266 | switch (to_usb_device(ddev)->speed) { | |
8a1b2725 | 267 | case USB_SPEED_SUPER_PLUS: |
6b403b02 | 268 | case USB_SPEED_SUPER: |
615ae11b | 269 | case USB_SPEED_HIGH: |
08c5cd37 AS |
270 | /* |
271 | * Many device manufacturers are using full-speed | |
300871cd | 272 | * bInterval values in high-speed interrupt endpoint |
08c5cd37 AS |
273 | * descriptors. Try to fix those and fall back to an |
274 | * 8-ms default value otherwise. | |
275 | */ | |
300871cd LP |
276 | n = fls(d->bInterval*8); |
277 | if (n == 0) | |
08c5cd37 | 278 | n = 7; /* 8 ms = 2^(7-1) uframes */ |
615ae11b | 279 | j = 16; |
cd83ce9e JMI |
280 | |
281 | /* | |
282 | * Adjust bInterval for quirked devices. | |
3243367b ST |
283 | */ |
284 | /* | |
285 | * This quirk fixes bIntervals reported in ms. | |
286 | */ | |
287 | if (to_usb_device(ddev)->quirks & | |
288 | USB_QUIRK_LINEAR_FRAME_INTR_BINTERVAL) { | |
289 | n = clamp(fls(d->bInterval) + 3, i, j); | |
290 | i = j = n; | |
291 | } | |
292 | /* | |
cd83ce9e JMI |
293 | * This quirk fixes bIntervals reported in |
294 | * linear microframes. | |
295 | */ | |
296 | if (to_usb_device(ddev)->quirks & | |
297 | USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) { | |
298 | n = clamp(fls(d->bInterval), i, j); | |
299 | i = j = n; | |
300 | } | |
615ae11b AS |
301 | break; |
302 | default: /* USB_SPEED_FULL or _LOW */ | |
08c5cd37 AS |
303 | /* |
304 | * For low-speed, 10 ms is the official minimum. | |
615ae11b | 305 | * But some "overclocked" devices might want faster |
08c5cd37 AS |
306 | * polling so we'll allow it. |
307 | */ | |
308 | n = 10; | |
615ae11b AS |
309 | break; |
310 | } | |
311 | } else if (usb_endpoint_xfer_isoc(d)) { | |
312 | i = 1; | |
313 | j = 16; | |
314 | switch (to_usb_device(ddev)->speed) { | |
315 | case USB_SPEED_HIGH: | |
08c5cd37 | 316 | n = 7; /* 8 ms = 2^(7-1) uframes */ |
615ae11b AS |
317 | break; |
318 | default: /* USB_SPEED_FULL */ | |
08c5cd37 | 319 | n = 4; /* 8 ms = 2^(4-1) frames */ |
615ae11b AS |
320 | break; |
321 | } | |
322 | } | |
323 | if (d->bInterval < i || d->bInterval > j) { | |
324 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
325 | "endpoint 0x%X has an invalid bInterval %d, " | |
326 | "changing to %d\n", | |
327 | cfgno, inum, asnum, | |
328 | d->bEndpointAddress, d->bInterval, n); | |
329 | endpoint->desc.bInterval = n; | |
330 | } | |
331 | ||
60aac1ec AS |
332 | /* Some buggy low-speed devices have Bulk endpoints, which is |
333 | * explicitly forbidden by the USB spec. In an attempt to make | |
334 | * them usable, we will try treating them as Interrupt endpoints. | |
335 | */ | |
336 | if (to_usb_device(ddev)->speed == USB_SPEED_LOW && | |
337 | usb_endpoint_xfer_bulk(d)) { | |
338 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
339 | "endpoint 0x%X is Bulk; changing to Interrupt\n", | |
340 | cfgno, inum, asnum, d->bEndpointAddress); | |
341 | endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT; | |
342 | endpoint->desc.bInterval = 1; | |
29cc8897 | 343 | if (usb_endpoint_maxp(&endpoint->desc) > 8) |
60aac1ec AS |
344 | endpoint->desc.wMaxPacketSize = cpu_to_le16(8); |
345 | } | |
346 | ||
aed9d65a AS |
347 | /* Validate the wMaxPacketSize field */ |
348 | maxp = usb_endpoint_maxp(&endpoint->desc); | |
349 | ||
350 | /* Find the highest legal maxpacket size for this endpoint */ | |
351 | i = 0; /* additional transactions per microframe */ | |
352 | switch (to_usb_device(ddev)->speed) { | |
353 | case USB_SPEED_LOW: | |
354 | maxpacket_maxes = low_speed_maxpacket_maxes; | |
355 | break; | |
356 | case USB_SPEED_FULL: | |
357 | maxpacket_maxes = full_speed_maxpacket_maxes; | |
358 | break; | |
359 | case USB_SPEED_HIGH: | |
360 | /* Bits 12..11 are allowed only for HS periodic endpoints */ | |
361 | if (usb_endpoint_xfer_int(d) || usb_endpoint_xfer_isoc(d)) { | |
362 | i = maxp & (BIT(12) | BIT(11)); | |
363 | maxp &= ~i; | |
364 | } | |
365 | /* fallthrough */ | |
366 | default: | |
367 | maxpacket_maxes = high_speed_maxpacket_maxes; | |
368 | break; | |
369 | case USB_SPEED_SUPER: | |
370 | case USB_SPEED_SUPER_PLUS: | |
371 | maxpacket_maxes = super_speed_maxpacket_maxes; | |
372 | break; | |
373 | } | |
374 | j = maxpacket_maxes[usb_endpoint_type(&endpoint->desc)]; | |
375 | ||
376 | if (maxp > j) { | |
377 | dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid maxpacket %d, setting to %d\n", | |
378 | cfgno, inum, asnum, d->bEndpointAddress, maxp, j); | |
379 | maxp = j; | |
380 | endpoint->desc.wMaxPacketSize = cpu_to_le16(i | maxp); | |
381 | } | |
382 | ||
caa9ef67 DB |
383 | /* |
384 | * Some buggy high speed devices have bulk endpoints using | |
385 | * maxpacket sizes other than 512. High speed HCDs may not | |
386 | * be able to handle that particular bug, so let's warn... | |
387 | */ | |
388 | if (to_usb_device(ddev)->speed == USB_SPEED_HIGH | |
389 | && usb_endpoint_xfer_bulk(d)) { | |
caa9ef67 DB |
390 | if (maxp != 512) |
391 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
392 | "bulk endpoint 0x%X has invalid maxpacket %d\n", | |
393 | cfgno, inum, asnum, d->bEndpointAddress, | |
394 | maxp); | |
395 | } | |
663c30d0 | 396 | |
842f1690 | 397 | /* Parse a possible SuperSpeed endpoint companion descriptor */ |
8a1b2725 | 398 | if (to_usb_device(ddev)->speed >= USB_SPEED_SUPER) |
842f1690 AS |
399 | usb_parse_ss_endpoint_companion(ddev, cfgno, |
400 | inum, asnum, endpoint, buffer, size); | |
9f8e4438 | 401 | |
842f1690 AS |
402 | /* Skip over any Class Specific or Vendor Specific descriptors; |
403 | * find the next endpoint or interface descriptor */ | |
404 | endpoint->extra = buffer; | |
405 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
406 | USB_DT_INTERFACE, &n); | |
407 | endpoint->extralen = i; | |
408 | retval = buffer - buffer0 + i; | |
1da177e4 LT |
409 | if (n > 0) |
410 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
411 | n, plural(n), "endpoint"); | |
663c30d0 | 412 | return retval; |
1da177e4 LT |
413 | |
414 | skip_to_next_endpoint_or_interface_descriptor: | |
415 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
416 | USB_DT_INTERFACE, NULL); | |
417 | return buffer - buffer0 + i; | |
418 | } | |
419 | ||
420 | void usb_release_interface_cache(struct kref *ref) | |
421 | { | |
422 | struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref); | |
423 | int j; | |
424 | ||
4f62efe6 AS |
425 | for (j = 0; j < intfc->num_altsetting; j++) { |
426 | struct usb_host_interface *alt = &intfc->altsetting[j]; | |
427 | ||
428 | kfree(alt->endpoint); | |
429 | kfree(alt->string); | |
430 | } | |
1da177e4 LT |
431 | kfree(intfc); |
432 | } | |
433 | ||
434 | static int usb_parse_interface(struct device *ddev, int cfgno, | |
435 | struct usb_host_config *config, unsigned char *buffer, int size, | |
436 | u8 inums[], u8 nalts[]) | |
437 | { | |
438 | unsigned char *buffer0 = buffer; | |
439 | struct usb_interface_descriptor *d; | |
440 | int inum, asnum; | |
441 | struct usb_interface_cache *intfc; | |
442 | struct usb_host_interface *alt; | |
443 | int i, n; | |
444 | int len, retval; | |
445 | int num_ep, num_ep_orig; | |
446 | ||
447 | d = (struct usb_interface_descriptor *) buffer; | |
448 | buffer += d->bLength; | |
449 | size -= d->bLength; | |
450 | ||
451 | if (d->bLength < USB_DT_INTERFACE_SIZE) | |
452 | goto skip_to_next_interface_descriptor; | |
453 | ||
454 | /* Which interface entry is this? */ | |
455 | intfc = NULL; | |
456 | inum = d->bInterfaceNumber; | |
457 | for (i = 0; i < config->desc.bNumInterfaces; ++i) { | |
458 | if (inums[i] == inum) { | |
459 | intfc = config->intf_cache[i]; | |
460 | break; | |
461 | } | |
462 | } | |
463 | if (!intfc || intfc->num_altsetting >= nalts[i]) | |
464 | goto skip_to_next_interface_descriptor; | |
465 | ||
466 | /* Check for duplicate altsetting entries */ | |
467 | asnum = d->bAlternateSetting; | |
468 | for ((i = 0, alt = &intfc->altsetting[0]); | |
469 | i < intfc->num_altsetting; | |
470 | (++i, ++alt)) { | |
471 | if (alt->desc.bAlternateSetting == asnum) { | |
472 | dev_warn(ddev, "Duplicate descriptor for config %d " | |
473 | "interface %d altsetting %d, skipping\n", | |
474 | cfgno, inum, asnum); | |
475 | goto skip_to_next_interface_descriptor; | |
476 | } | |
477 | } | |
478 | ||
479 | ++intfc->num_altsetting; | |
480 | memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE); | |
481 | ||
482 | /* Skip over any Class Specific or Vendor Specific descriptors; | |
483 | * find the first endpoint or interface descriptor */ | |
484 | alt->extra = buffer; | |
485 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
486 | USB_DT_INTERFACE, &n); | |
487 | alt->extralen = i; | |
488 | if (n > 0) | |
489 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
490 | n, plural(n), "interface"); | |
491 | buffer += i; | |
492 | size -= i; | |
493 | ||
494 | /* Allocate space for the right(?) number of endpoints */ | |
495 | num_ep = num_ep_orig = alt->desc.bNumEndpoints; | |
2c044a48 | 496 | alt->desc.bNumEndpoints = 0; /* Use as a counter */ |
1da177e4 LT |
497 | if (num_ep > USB_MAXENDPOINTS) { |
498 | dev_warn(ddev, "too many endpoints for config %d interface %d " | |
499 | "altsetting %d: %d, using maximum allowed: %d\n", | |
500 | cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS); | |
501 | num_ep = USB_MAXENDPOINTS; | |
502 | } | |
503 | ||
2c044a48 GKH |
504 | if (num_ep > 0) { |
505 | /* Can't allocate 0 bytes */ | |
57a21c1b AS |
506 | len = sizeof(struct usb_host_endpoint) * num_ep; |
507 | alt->endpoint = kzalloc(len, GFP_KERNEL); | |
508 | if (!alt->endpoint) | |
509 | return -ENOMEM; | |
510 | } | |
1da177e4 LT |
511 | |
512 | /* Parse all the endpoint descriptors */ | |
513 | n = 0; | |
514 | while (size > 0) { | |
515 | if (((struct usb_descriptor_header *) buffer)->bDescriptorType | |
516 | == USB_DT_INTERFACE) | |
517 | break; | |
518 | retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt, | |
519 | num_ep, buffer, size); | |
520 | if (retval < 0) | |
521 | return retval; | |
522 | ++n; | |
523 | ||
524 | buffer += retval; | |
525 | size -= retval; | |
526 | } | |
527 | ||
528 | if (n != num_ep_orig) | |
529 | dev_warn(ddev, "config %d interface %d altsetting %d has %d " | |
530 | "endpoint descriptor%s, different from the interface " | |
531 | "descriptor's value: %d\n", | |
532 | cfgno, inum, asnum, n, plural(n), num_ep_orig); | |
533 | return buffer - buffer0; | |
534 | ||
535 | skip_to_next_interface_descriptor: | |
536 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |
537 | USB_DT_INTERFACE, NULL); | |
538 | return buffer - buffer0 + i; | |
539 | } | |
540 | ||
317149c6 | 541 | static int usb_parse_configuration(struct usb_device *dev, int cfgidx, |
1da177e4 LT |
542 | struct usb_host_config *config, unsigned char *buffer, int size) |
543 | { | |
317149c6 | 544 | struct device *ddev = &dev->dev; |
1da177e4 LT |
545 | unsigned char *buffer0 = buffer; |
546 | int cfgno; | |
547 | int nintf, nintf_orig; | |
548 | int i, j, n; | |
549 | struct usb_interface_cache *intfc; | |
550 | unsigned char *buffer2; | |
551 | int size2; | |
552 | struct usb_descriptor_header *header; | |
553 | int len, retval; | |
554 | u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; | |
165fe97e | 555 | unsigned iad_num = 0; |
1da177e4 LT |
556 | |
557 | memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); | |
48a4ff1c AS |
558 | nintf = nintf_orig = config->desc.bNumInterfaces; |
559 | config->desc.bNumInterfaces = 0; // Adjusted later | |
560 | ||
1da177e4 | 561 | if (config->desc.bDescriptorType != USB_DT_CONFIG || |
b4f17a48 HG |
562 | config->desc.bLength < USB_DT_CONFIG_SIZE || |
563 | config->desc.bLength > size) { | |
1da177e4 LT |
564 | dev_err(ddev, "invalid descriptor for config index %d: " |
565 | "type = 0x%X, length = %d\n", cfgidx, | |
566 | config->desc.bDescriptorType, config->desc.bLength); | |
567 | return -EINVAL; | |
568 | } | |
569 | cfgno = config->desc.bConfigurationValue; | |
570 | ||
571 | buffer += config->desc.bLength; | |
572 | size -= config->desc.bLength; | |
573 | ||
1da177e4 LT |
574 | if (nintf > USB_MAXINTERFACES) { |
575 | dev_warn(ddev, "config %d has too many interfaces: %d, " | |
576 | "using maximum allowed: %d\n", | |
577 | cfgno, nintf, USB_MAXINTERFACES); | |
578 | nintf = USB_MAXINTERFACES; | |
579 | } | |
580 | ||
581 | /* Go through the descriptors, checking their length and counting the | |
582 | * number of altsettings for each interface */ | |
583 | n = 0; | |
584 | for ((buffer2 = buffer, size2 = size); | |
585 | size2 > 0; | |
586 | (buffer2 += header->bLength, size2 -= header->bLength)) { | |
587 | ||
588 | if (size2 < sizeof(struct usb_descriptor_header)) { | |
589 | dev_warn(ddev, "config %d descriptor has %d excess " | |
590 | "byte%s, ignoring\n", | |
591 | cfgno, size2, plural(size2)); | |
592 | break; | |
593 | } | |
594 | ||
595 | header = (struct usb_descriptor_header *) buffer2; | |
596 | if ((header->bLength > size2) || (header->bLength < 2)) { | |
597 | dev_warn(ddev, "config %d has an invalid descriptor " | |
598 | "of length %d, skipping remainder of the config\n", | |
599 | cfgno, header->bLength); | |
600 | break; | |
601 | } | |
602 | ||
603 | if (header->bDescriptorType == USB_DT_INTERFACE) { | |
604 | struct usb_interface_descriptor *d; | |
605 | int inum; | |
606 | ||
607 | d = (struct usb_interface_descriptor *) header; | |
608 | if (d->bLength < USB_DT_INTERFACE_SIZE) { | |
609 | dev_warn(ddev, "config %d has an invalid " | |
610 | "interface descriptor of length %d, " | |
611 | "skipping\n", cfgno, d->bLength); | |
612 | continue; | |
613 | } | |
614 | ||
615 | inum = d->bInterfaceNumber; | |
317149c6 HG |
616 | |
617 | if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) && | |
618 | n >= nintf_orig) { | |
619 | dev_warn(ddev, "config %d has more interface " | |
620 | "descriptors, than it declares in " | |
621 | "bNumInterfaces, ignoring interface " | |
622 | "number: %d\n", cfgno, inum); | |
623 | continue; | |
624 | } | |
625 | ||
1da177e4 LT |
626 | if (inum >= nintf_orig) |
627 | dev_warn(ddev, "config %d has an invalid " | |
628 | "interface number: %d but max is %d\n", | |
629 | cfgno, inum, nintf_orig - 1); | |
630 | ||
631 | /* Have we already encountered this interface? | |
632 | * Count its altsettings */ | |
633 | for (i = 0; i < n; ++i) { | |
634 | if (inums[i] == inum) | |
635 | break; | |
636 | } | |
637 | if (i < n) { | |
638 | if (nalts[i] < 255) | |
639 | ++nalts[i]; | |
640 | } else if (n < USB_MAXINTERFACES) { | |
641 | inums[n] = inum; | |
642 | nalts[n] = 1; | |
643 | ++n; | |
644 | } | |
645 | ||
165fe97e CN |
646 | } else if (header->bDescriptorType == |
647 | USB_DT_INTERFACE_ASSOCIATION) { | |
bd7a3fe7 GKH |
648 | struct usb_interface_assoc_descriptor *d; |
649 | ||
650 | d = (struct usb_interface_assoc_descriptor *)header; | |
651 | if (d->bLength < USB_DT_INTERFACE_ASSOCIATION_SIZE) { | |
652 | dev_warn(ddev, | |
653 | "config %d has an invalid interface association descriptor of length %d, skipping\n", | |
654 | cfgno, d->bLength); | |
655 | continue; | |
656 | } | |
657 | ||
165fe97e CN |
658 | if (iad_num == USB_MAXIADS) { |
659 | dev_warn(ddev, "found more Interface " | |
660 | "Association Descriptors " | |
661 | "than allocated for in " | |
662 | "configuration %d\n", cfgno); | |
663 | } else { | |
bd7a3fe7 | 664 | config->intf_assoc[iad_num] = d; |
165fe97e CN |
665 | iad_num++; |
666 | } | |
667 | ||
1da177e4 LT |
668 | } else if (header->bDescriptorType == USB_DT_DEVICE || |
669 | header->bDescriptorType == USB_DT_CONFIG) | |
670 | dev_warn(ddev, "config %d contains an unexpected " | |
671 | "descriptor of type 0x%X, skipping\n", | |
672 | cfgno, header->bDescriptorType); | |
673 | ||
674 | } /* for ((buffer2 = buffer, size2 = size); ...) */ | |
675 | size = buffer2 - buffer; | |
676 | config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0); | |
677 | ||
678 | if (n != nintf) | |
679 | dev_warn(ddev, "config %d has %d interface%s, different from " | |
680 | "the descriptor's value: %d\n", | |
681 | cfgno, n, plural(n), nintf_orig); | |
682 | else if (n == 0) | |
683 | dev_warn(ddev, "config %d has no interfaces?\n", cfgno); | |
684 | config->desc.bNumInterfaces = nintf = n; | |
685 | ||
686 | /* Check for missing interface numbers */ | |
687 | for (i = 0; i < nintf; ++i) { | |
688 | for (j = 0; j < nintf; ++j) { | |
689 | if (inums[j] == i) | |
690 | break; | |
691 | } | |
692 | if (j >= nintf) | |
693 | dev_warn(ddev, "config %d has no interface number " | |
694 | "%d\n", cfgno, i); | |
695 | } | |
696 | ||
697 | /* Allocate the usb_interface_caches and altsetting arrays */ | |
698 | for (i = 0; i < nintf; ++i) { | |
699 | j = nalts[i]; | |
700 | if (j > USB_MAXALTSETTING) { | |
701 | dev_warn(ddev, "too many alternate settings for " | |
702 | "config %d interface %d: %d, " | |
703 | "using maximum allowed: %d\n", | |
704 | cfgno, inums[i], j, USB_MAXALTSETTING); | |
705 | nalts[i] = j = USB_MAXALTSETTING; | |
706 | } | |
707 | ||
708 | len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j; | |
0a1ef3b5 | 709 | config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
710 | if (!intfc) |
711 | return -ENOMEM; | |
1da177e4 LT |
712 | kref_init(&intfc->ref); |
713 | } | |
714 | ||
663c30d0 SS |
715 | /* FIXME: parse the BOS descriptor */ |
716 | ||
1da177e4 LT |
717 | /* Skip over any Class Specific or Vendor Specific descriptors; |
718 | * find the first interface descriptor */ | |
719 | config->extra = buffer; | |
720 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |
721 | USB_DT_INTERFACE, &n); | |
722 | config->extralen = i; | |
723 | if (n > 0) | |
724 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
725 | n, plural(n), "configuration"); | |
726 | buffer += i; | |
727 | size -= i; | |
728 | ||
729 | /* Parse all the interface/altsetting descriptors */ | |
730 | while (size > 0) { | |
731 | retval = usb_parse_interface(ddev, cfgno, config, | |
732 | buffer, size, inums, nalts); | |
733 | if (retval < 0) | |
734 | return retval; | |
735 | ||
736 | buffer += retval; | |
737 | size -= retval; | |
738 | } | |
739 | ||
740 | /* Check for missing altsettings */ | |
741 | for (i = 0; i < nintf; ++i) { | |
742 | intfc = config->intf_cache[i]; | |
743 | for (j = 0; j < intfc->num_altsetting; ++j) { | |
744 | for (n = 0; n < intfc->num_altsetting; ++n) { | |
745 | if (intfc->altsetting[n].desc. | |
746 | bAlternateSetting == j) | |
747 | break; | |
748 | } | |
749 | if (n >= intfc->num_altsetting) | |
750 | dev_warn(ddev, "config %d interface %d has no " | |
751 | "altsetting %d\n", cfgno, inums[i], j); | |
752 | } | |
753 | } | |
754 | ||
755 | return 0; | |
756 | } | |
757 | ||
2c044a48 GKH |
758 | /* hub-only!! ... and only exported for reset/reinit path. |
759 | * otherwise used internally on disconnect/destroy path | |
760 | */ | |
1da177e4 LT |
761 | void usb_destroy_configuration(struct usb_device *dev) |
762 | { | |
763 | int c, i; | |
764 | ||
765 | if (!dev->config) | |
766 | return; | |
767 | ||
768 | if (dev->rawdescriptors) { | |
cf4df407 | 769 | for (i = 0; i < dev->descriptor.bNumConfigurations; i++) |
1da177e4 LT |
770 | kfree(dev->rawdescriptors[i]); |
771 | ||
772 | kfree(dev->rawdescriptors); | |
773 | dev->rawdescriptors = NULL; | |
774 | } | |
775 | ||
cf4df407 | 776 | for (c = 0; c < dev->descriptor.bNumConfigurations; c++) { |
1da177e4 LT |
777 | struct usb_host_config *cf = &dev->config[c]; |
778 | ||
779 | kfree(cf->string); | |
cf4df407 | 780 | for (i = 0; i < cf->desc.bNumInterfaces; i++) { |
1da177e4 | 781 | if (cf->intf_cache[i]) |
2c044a48 | 782 | kref_put(&cf->intf_cache[i]->ref, |
1da177e4 LT |
783 | usb_release_interface_cache); |
784 | } | |
785 | } | |
786 | kfree(dev->config); | |
787 | dev->config = NULL; | |
788 | } | |
789 | ||
790 | ||
1145065c IPG |
791 | /* |
792 | * Get the USB config descriptors, cache and parse'em | |
793 | * | |
794 | * hub-only!! ... and only in reset path, or usb_new_device() | |
795 | * (used by real hubs and virtual root hubs) | |
1145065c | 796 | */ |
1da177e4 LT |
797 | int usb_get_configuration(struct usb_device *dev) |
798 | { | |
799 | struct device *ddev = &dev->dev; | |
800 | int ncfg = dev->descriptor.bNumConfigurations; | |
1145065c | 801 | int result = 0; |
1da177e4 | 802 | unsigned int cfgno, length; |
1da177e4 | 803 | unsigned char *bigbuffer; |
2c044a48 | 804 | struct usb_config_descriptor *desc; |
1da177e4 | 805 | |
1145065c | 806 | cfgno = 0; |
1145065c | 807 | result = -ENOMEM; |
1da177e4 LT |
808 | if (ncfg > USB_MAXCONFIG) { |
809 | dev_warn(ddev, "too many configurations: %d, " | |
810 | "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); | |
811 | dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; | |
812 | } | |
813 | ||
814 | if (ncfg < 1) { | |
815 | dev_err(ddev, "no configurations\n"); | |
816 | return -EINVAL; | |
817 | } | |
818 | ||
819 | length = ncfg * sizeof(struct usb_host_config); | |
0a1ef3b5 | 820 | dev->config = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
821 | if (!dev->config) |
822 | goto err2; | |
1da177e4 LT |
823 | |
824 | length = ncfg * sizeof(char *); | |
0a1ef3b5 | 825 | dev->rawdescriptors = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
826 | if (!dev->rawdescriptors) |
827 | goto err2; | |
1da177e4 | 828 | |
e8f4af30 MN |
829 | desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL); |
830 | if (!desc) | |
1da177e4 | 831 | goto err2; |
1da177e4 | 832 | |
1145065c IPG |
833 | result = 0; |
834 | for (; cfgno < ncfg; cfgno++) { | |
1da177e4 LT |
835 | /* We grab just the first descriptor so we know how long |
836 | * the whole configuration is */ | |
837 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, | |
e8f4af30 | 838 | desc, USB_DT_CONFIG_SIZE); |
1da177e4 LT |
839 | if (result < 0) { |
840 | dev_err(ddev, "unable to read config index %d " | |
1145065c | 841 | "descriptor/%s: %d\n", cfgno, "start", result); |
3a22b872 LT |
842 | if (result != -EPIPE) |
843 | goto err; | |
cb4c8fe5 IPG |
844 | dev_err(ddev, "chopping to %d config(s)\n", cfgno); |
845 | dev->descriptor.bNumConfigurations = cfgno; | |
846 | break; | |
1da177e4 LT |
847 | } else if (result < 4) { |
848 | dev_err(ddev, "config index %d descriptor too short " | |
849 | "(expected %i, got %i)\n", cfgno, | |
850 | USB_DT_CONFIG_SIZE, result); | |
851 | result = -EINVAL; | |
852 | goto err; | |
853 | } | |
854 | length = max((int) le16_to_cpu(desc->wTotalLength), | |
855 | USB_DT_CONFIG_SIZE); | |
856 | ||
857 | /* Now that we know the length, get the whole thing */ | |
858 | bigbuffer = kmalloc(length, GFP_KERNEL); | |
859 | if (!bigbuffer) { | |
860 | result = -ENOMEM; | |
861 | goto err; | |
862 | } | |
d86db25e JW |
863 | |
864 | if (dev->quirks & USB_QUIRK_DELAY_INIT) | |
b2a542bb | 865 | msleep(200); |
d86db25e | 866 | |
1da177e4 LT |
867 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, |
868 | bigbuffer, length); | |
869 | if (result < 0) { | |
870 | dev_err(ddev, "unable to read config index %d " | |
871 | "descriptor/%s\n", cfgno, "all"); | |
872 | kfree(bigbuffer); | |
873 | goto err; | |
874 | } | |
875 | if (result < length) { | |
876 | dev_warn(ddev, "config index %d descriptor too short " | |
877 | "(expected %i, got %i)\n", cfgno, length, result); | |
878 | length = result; | |
879 | } | |
880 | ||
881 | dev->rawdescriptors[cfgno] = bigbuffer; | |
882 | ||
317149c6 | 883 | result = usb_parse_configuration(dev, cfgno, |
1da177e4 LT |
884 | &dev->config[cfgno], bigbuffer, length); |
885 | if (result < 0) { | |
886 | ++cfgno; | |
887 | goto err; | |
888 | } | |
889 | } | |
890 | result = 0; | |
891 | ||
892 | err: | |
e8f4af30 | 893 | kfree(desc); |
1da177e4 LT |
894 | dev->descriptor.bNumConfigurations = cfgno; |
895 | err2: | |
896 | if (result == -ENOMEM) | |
897 | dev_err(ddev, "out of memory\n"); | |
898 | return result; | |
899 | } | |
3148bf04 AX |
900 | |
901 | void usb_release_bos_descriptor(struct usb_device *dev) | |
902 | { | |
903 | if (dev->bos) { | |
904 | kfree(dev->bos->desc); | |
905 | kfree(dev->bos); | |
906 | dev->bos = NULL; | |
907 | } | |
908 | } | |
909 | ||
81cf4a45 MM |
910 | static const __u8 bos_desc_len[256] = { |
911 | [USB_CAP_TYPE_WIRELESS_USB] = USB_DT_USB_WIRELESS_CAP_SIZE, | |
912 | [USB_CAP_TYPE_EXT] = USB_DT_USB_EXT_CAP_SIZE, | |
913 | [USB_SS_CAP_TYPE] = USB_DT_USB_SS_CAP_SIZE, | |
914 | [USB_SSP_CAP_TYPE] = USB_DT_USB_SSP_CAP_SIZE(1), | |
915 | [CONTAINER_ID_TYPE] = USB_DT_USB_SS_CONTN_ID_SIZE, | |
916 | [USB_PTM_CAP_TYPE] = USB_DT_USB_PTM_ID_SIZE, | |
917 | }; | |
918 | ||
3148bf04 AX |
919 | /* Get BOS descriptor set */ |
920 | int usb_get_bos_descriptor(struct usb_device *dev) | |
921 | { | |
922 | struct device *ddev = &dev->dev; | |
923 | struct usb_bos_descriptor *bos; | |
924 | struct usb_dev_cap_header *cap; | |
81cf4a45 | 925 | struct usb_ssp_cap_descriptor *ssp_cap; |
3148bf04 | 926 | unsigned char *buffer; |
81cf4a45 MM |
927 | int length, total_len, num, i, ssac; |
928 | __u8 cap_type; | |
3148bf04 AX |
929 | int ret; |
930 | ||
931 | bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL); | |
932 | if (!bos) | |
933 | return -ENOMEM; | |
934 | ||
935 | /* Get BOS descriptor */ | |
936 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE); | |
937 | if (ret < USB_DT_BOS_SIZE) { | |
938 | dev_err(ddev, "unable to get BOS descriptor\n"); | |
939 | if (ret >= 0) | |
940 | ret = -ENOMSG; | |
941 | kfree(bos); | |
942 | return ret; | |
943 | } | |
944 | ||
945 | length = bos->bLength; | |
946 | total_len = le16_to_cpu(bos->wTotalLength); | |
947 | num = bos->bNumDeviceCaps; | |
948 | kfree(bos); | |
949 | if (total_len < length) | |
950 | return -EINVAL; | |
951 | ||
952 | dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL); | |
953 | if (!dev->bos) | |
954 | return -ENOMEM; | |
955 | ||
956 | /* Now let's get the whole BOS descriptor set */ | |
957 | buffer = kzalloc(total_len, GFP_KERNEL); | |
958 | if (!buffer) { | |
959 | ret = -ENOMEM; | |
960 | goto err; | |
961 | } | |
962 | dev->bos->desc = (struct usb_bos_descriptor *)buffer; | |
963 | ||
964 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len); | |
965 | if (ret < total_len) { | |
966 | dev_err(ddev, "unable to get BOS descriptor set\n"); | |
967 | if (ret >= 0) | |
968 | ret = -ENOMSG; | |
969 | goto err; | |
970 | } | |
971 | total_len -= length; | |
972 | ||
973 | for (i = 0; i < num; i++) { | |
974 | buffer += length; | |
975 | cap = (struct usb_dev_cap_header *)buffer; | |
3148bf04 | 976 | |
1c0edc36 AS |
977 | if (total_len < sizeof(*cap) || total_len < cap->bLength) { |
978 | dev->bos->desc->bNumDeviceCaps = i; | |
3148bf04 | 979 | break; |
1c0edc36 | 980 | } |
81cf4a45 | 981 | cap_type = cap->bDevCapabilityType; |
1c0edc36 | 982 | length = cap->bLength; |
81cf4a45 MM |
983 | if (bos_desc_len[cap_type] && length < bos_desc_len[cap_type]) { |
984 | dev->bos->desc->bNumDeviceCaps = i; | |
985 | break; | |
986 | } | |
987 | ||
3148bf04 AX |
988 | total_len -= length; |
989 | ||
990 | if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { | |
991 | dev_warn(ddev, "descriptor type invalid, skip\n"); | |
992 | continue; | |
993 | } | |
994 | ||
81cf4a45 | 995 | switch (cap_type) { |
3148bf04 AX |
996 | case USB_CAP_TYPE_WIRELESS_USB: |
997 | /* Wireless USB cap descriptor is handled by wusb */ | |
998 | break; | |
999 | case USB_CAP_TYPE_EXT: | |
1000 | dev->bos->ext_cap = | |
1001 | (struct usb_ext_cap_descriptor *)buffer; | |
1002 | break; | |
1003 | case USB_SS_CAP_TYPE: | |
1004 | dev->bos->ss_cap = | |
1005 | (struct usb_ss_cap_descriptor *)buffer; | |
1006 | break; | |
3220befd | 1007 | case USB_SSP_CAP_TYPE: |
81cf4a45 MM |
1008 | ssp_cap = (struct usb_ssp_cap_descriptor *)buffer; |
1009 | ssac = (le32_to_cpu(ssp_cap->bmAttributes) & | |
07b9f128 | 1010 | USB_SSP_SUBLINK_SPEED_ATTRIBS); |
81cf4a45 MM |
1011 | if (length >= USB_DT_USB_SSP_CAP_SIZE(ssac)) |
1012 | dev->bos->ssp_cap = ssp_cap; | |
3220befd | 1013 | break; |
3148bf04 AX |
1014 | case CONTAINER_ID_TYPE: |
1015 | dev->bos->ss_id = | |
1016 | (struct usb_ss_container_id_descriptor *)buffer; | |
1017 | break; | |
faee822c MN |
1018 | case USB_PTM_CAP_TYPE: |
1019 | dev->bos->ptm_cap = | |
1020 | (struct usb_ptm_cap_descriptor *)buffer; | |
3148bf04 AX |
1021 | default: |
1022 | break; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | return 0; | |
1027 | ||
1028 | err: | |
1029 | usb_release_bos_descriptor(dev); | |
1030 | return ret; | |
1031 | } |