Commit | Line | Data |
---|---|---|
1da177e4 | 1 | #include <linux/usb.h> |
615ae11b | 2 | #include <linux/usb/ch9.h> |
27729aad | 3 | #include <linux/usb/hcd.h> |
317149c6 | 4 | #include <linux/usb/quirks.h> |
1da177e4 | 5 | #include <linux/module.h> |
1da177e4 LT |
6 | #include <linux/slab.h> |
7 | #include <linux/device.h> | |
8 | #include <asm/byteorder.h> | |
6d5e8254 | 9 | #include "usb.h" |
27729aad | 10 | |
1da177e4 LT |
11 | |
12 | #define USB_MAXALTSETTING 128 /* Hard limit */ | |
1da177e4 LT |
13 | |
14 | #define USB_MAXCONFIG 8 /* Arbitrary limit */ | |
15 | ||
16 | ||
17 | static inline const char *plural(int n) | |
18 | { | |
19 | return (n == 1 ? "" : "s"); | |
20 | } | |
21 | ||
22 | static int find_next_descriptor(unsigned char *buffer, int size, | |
23 | int dt1, int dt2, int *num_skipped) | |
24 | { | |
25 | struct usb_descriptor_header *h; | |
26 | int n = 0; | |
27 | unsigned char *buffer0 = buffer; | |
28 | ||
29 | /* Find the next descriptor of type dt1 or dt2 */ | |
30 | while (size > 0) { | |
31 | h = (struct usb_descriptor_header *) buffer; | |
32 | if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2) | |
33 | break; | |
34 | buffer += h->bLength; | |
35 | size -= h->bLength; | |
36 | ++n; | |
37 | } | |
38 | ||
39 | /* Store the number of descriptors skipped and return the | |
40 | * number of bytes skipped */ | |
41 | if (num_skipped) | |
42 | *num_skipped = n; | |
43 | return buffer - buffer0; | |
44 | } | |
45 | ||
842f1690 | 46 | static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno, |
663c30d0 | 47 | int inum, int asnum, struct usb_host_endpoint *ep, |
842f1690 | 48 | unsigned char *buffer, int size) |
663c30d0 | 49 | { |
842f1690 | 50 | struct usb_ss_ep_comp_descriptor *desc; |
663c30d0 | 51 | int max_tx; |
663c30d0 | 52 | |
842f1690 AS |
53 | /* The SuperSpeed endpoint companion descriptor is supposed to |
54 | * be the first thing immediately following the endpoint descriptor. | |
55 | */ | |
f0058c62 | 56 | desc = (struct usb_ss_ep_comp_descriptor *) buffer; |
842f1690 AS |
57 | if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP || |
58 | size < USB_DT_SS_EP_COMP_SIZE) { | |
663c30d0 SS |
59 | dev_warn(ddev, "No SuperSpeed endpoint companion for config %d " |
60 | " interface %d altsetting %d ep %d: " | |
61 | "using minimum values\n", | |
62 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
63 | |
64 | /* Fill in some default values. | |
65 | * Leave bmAttributes as zero, which will mean no streams for | |
66 | * bulk, and isoc won't support multiple bursts of packets. | |
67 | * With bursts of only one packet, and a Mult of 1, the max | |
68 | * amount of data moved per endpoint service interval is one | |
69 | * packet. | |
663c30d0 | 70 | */ |
842f1690 AS |
71 | ep->ss_ep_comp.bLength = USB_DT_SS_EP_COMP_SIZE; |
72 | ep->ss_ep_comp.bDescriptorType = USB_DT_SS_ENDPOINT_COMP; | |
73 | if (usb_endpoint_xfer_isoc(&ep->desc) || | |
74 | usb_endpoint_xfer_int(&ep->desc)) | |
75 | ep->ss_ep_comp.wBytesPerInterval = | |
76 | ep->desc.wMaxPacketSize; | |
77 | return; | |
663c30d0 | 78 | } |
663c30d0 | 79 | |
842f1690 | 80 | memcpy(&ep->ss_ep_comp, desc, USB_DT_SS_EP_COMP_SIZE); |
663c30d0 SS |
81 | |
82 | /* Check the various values */ | |
83 | if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) { | |
84 | dev_warn(ddev, "Control endpoint with bMaxBurst = %d in " | |
85 | "config %d interface %d altsetting %d ep %d: " | |
86 | "setting to zero\n", desc->bMaxBurst, | |
87 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
88 | ep->ss_ep_comp.bMaxBurst = 0; |
89 | } else if (desc->bMaxBurst > 15) { | |
663c30d0 SS |
90 | dev_warn(ddev, "Endpoint with bMaxBurst = %d in " |
91 | "config %d interface %d altsetting %d ep %d: " | |
92 | "setting to 15\n", desc->bMaxBurst, | |
93 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 | 94 | ep->ss_ep_comp.bMaxBurst = 15; |
663c30d0 | 95 | } |
842f1690 AS |
96 | |
97 | if ((usb_endpoint_xfer_control(&ep->desc) || | |
98 | usb_endpoint_xfer_int(&ep->desc)) && | |
99 | desc->bmAttributes != 0) { | |
663c30d0 SS |
100 | dev_warn(ddev, "%s endpoint with bmAttributes = %d in " |
101 | "config %d interface %d altsetting %d ep %d: " | |
102 | "setting to zero\n", | |
103 | usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk", | |
104 | desc->bmAttributes, | |
105 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
106 | ep->ss_ep_comp.bmAttributes = 0; |
107 | } else if (usb_endpoint_xfer_bulk(&ep->desc) && | |
108 | desc->bmAttributes > 16) { | |
663c30d0 SS |
109 | dev_warn(ddev, "Bulk endpoint with more than 65536 streams in " |
110 | "config %d interface %d altsetting %d ep %d: " | |
111 | "setting to max\n", | |
112 | cfgno, inum, asnum, ep->desc.bEndpointAddress); | |
842f1690 AS |
113 | ep->ss_ep_comp.bmAttributes = 16; |
114 | } else if (usb_endpoint_xfer_isoc(&ep->desc) && | |
ff30cbc8 | 115 | USB_SS_MULT(desc->bmAttributes) > 3) { |
663c30d0 SS |
116 | dev_warn(ddev, "Isoc endpoint has Mult of %d in " |
117 | "config %d interface %d altsetting %d ep %d: " | |
5377adb0 BH |
118 | "setting to 3\n", |
119 | USB_SS_MULT(desc->bmAttributes), | |
663c30d0 | 120 | cfgno, inum, asnum, ep->desc.bEndpointAddress); |
842f1690 | 121 | ep->ss_ep_comp.bmAttributes = 2; |
663c30d0 | 122 | } |
842f1690 AS |
123 | |
124 | if (usb_endpoint_xfer_isoc(&ep->desc)) | |
ff30cbc8 MN |
125 | max_tx = (desc->bMaxBurst + 1) * |
126 | (USB_SS_MULT(desc->bmAttributes)) * | |
29cc8897 | 127 | usb_endpoint_maxp(&ep->desc); |
842f1690 | 128 | else if (usb_endpoint_xfer_int(&ep->desc)) |
29cc8897 | 129 | max_tx = usb_endpoint_maxp(&ep->desc) * |
7de7c7d2 | 130 | (desc->bMaxBurst + 1); |
842f1690 AS |
131 | else |
132 | max_tx = 999999; | |
64b3c304 | 133 | if (le16_to_cpu(desc->wBytesPerInterval) > max_tx) { |
663c30d0 SS |
134 | dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in " |
135 | "config %d interface %d altsetting %d ep %d: " | |
136 | "setting to %d\n", | |
137 | usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int", | |
7de7c7d2 | 138 | le16_to_cpu(desc->wBytesPerInterval), |
663c30d0 SS |
139 | cfgno, inum, asnum, ep->desc.bEndpointAddress, |
140 | max_tx); | |
7de7c7d2 | 141 | ep->ss_ep_comp.wBytesPerInterval = cpu_to_le16(max_tx); |
663c30d0 | 142 | } |
663c30d0 SS |
143 | } |
144 | ||
1da177e4 LT |
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) | |
148 | { | |
149 | unsigned char *buffer0 = buffer; | |
150 | struct usb_endpoint_descriptor *d; | |
151 | struct usb_host_endpoint *endpoint; | |
663c30d0 | 152 | int n, i, j, retval; |
1da177e4 LT |
153 | |
154 | d = (struct usb_endpoint_descriptor *) buffer; | |
155 | buffer += d->bLength; | |
156 | size -= d->bLength; | |
157 | ||
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; | |
162 | else { | |
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; | |
167 | } | |
168 | ||
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; | |
175 | } | |
176 | ||
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; | |
180 | ||
181 | endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints]; | |
182 | ++ifp->desc.bNumEndpoints; | |
183 | ||
184 | memcpy(&endpoint->desc, d, n); | |
185 | INIT_LIST_HEAD(&endpoint->urb_list); | |
186 | ||
300871cd LP |
187 | /* Fix up bInterval values outside the legal range. Use 32 ms if no |
188 | * proper value can be guessed. */ | |
615ae11b AS |
189 | i = 0; /* i = min, j = max, n = default */ |
190 | j = 255; | |
191 | if (usb_endpoint_xfer_int(d)) { | |
192 | i = 1; | |
193 | switch (to_usb_device(ddev)->speed) { | |
6b403b02 | 194 | case USB_SPEED_SUPER: |
615ae11b | 195 | case USB_SPEED_HIGH: |
300871cd LP |
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); | |
201 | if (n == 0) | |
202 | n = 9; /* 32 ms = 2^(9-1) uframes */ | |
615ae11b | 203 | j = 16; |
cd83ce9e JMI |
204 | |
205 | /* | |
206 | * Adjust bInterval for quirked devices. | |
207 | * This quirk fixes bIntervals reported in | |
208 | * linear microframes. | |
209 | */ | |
210 | if (to_usb_device(ddev)->quirks & | |
211 | USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) { | |
212 | n = clamp(fls(d->bInterval), i, j); | |
213 | i = j = n; | |
214 | } | |
615ae11b AS |
215 | break; |
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. */ | |
220 | n = 32; | |
221 | break; | |
222 | } | |
223 | } else if (usb_endpoint_xfer_isoc(d)) { | |
224 | i = 1; | |
225 | j = 16; | |
226 | switch (to_usb_device(ddev)->speed) { | |
227 | case USB_SPEED_HIGH: | |
228 | n = 9; /* 32 ms = 2^(9-1) uframes */ | |
229 | break; | |
230 | default: /* USB_SPEED_FULL */ | |
231 | n = 6; /* 32 ms = 2^(6-1) frames */ | |
232 | break; | |
233 | } | |
234 | } | |
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, " | |
238 | "changing to %d\n", | |
239 | cfgno, inum, asnum, | |
240 | d->bEndpointAddress, d->bInterval, n); | |
241 | endpoint->desc.bInterval = n; | |
242 | } | |
243 | ||
60aac1ec AS |
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. | |
247 | */ | |
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; | |
29cc8897 | 255 | if (usb_endpoint_maxp(&endpoint->desc) > 8) |
60aac1ec AS |
256 | endpoint->desc.wMaxPacketSize = cpu_to_le16(8); |
257 | } | |
258 | ||
caa9ef67 DB |
259 | /* |
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... | |
263 | */ | |
264 | if (to_usb_device(ddev)->speed == USB_SPEED_HIGH | |
265 | && usb_endpoint_xfer_bulk(d)) { | |
266 | unsigned maxp; | |
267 | ||
29cc8897 | 268 | maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff; |
caa9ef67 DB |
269 | if (maxp != 512) |
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, | |
273 | maxp); | |
274 | } | |
663c30d0 | 275 | |
842f1690 AS |
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); | |
9f8e4438 | 280 | |
842f1690 AS |
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; | |
1da177e4 LT |
288 | if (n > 0) |
289 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
290 | n, plural(n), "endpoint"); | |
663c30d0 | 291 | return retval; |
1da177e4 LT |
292 | |
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; | |
297 | } | |
298 | ||
299 | void usb_release_interface_cache(struct kref *ref) | |
300 | { | |
301 | struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref); | |
302 | int j; | |
303 | ||
4f62efe6 AS |
304 | for (j = 0; j < intfc->num_altsetting; j++) { |
305 | struct usb_host_interface *alt = &intfc->altsetting[j]; | |
306 | ||
307 | kfree(alt->endpoint); | |
308 | kfree(alt->string); | |
309 | } | |
1da177e4 LT |
310 | kfree(intfc); |
311 | } | |
312 | ||
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[]) | |
316 | { | |
317 | unsigned char *buffer0 = buffer; | |
318 | struct usb_interface_descriptor *d; | |
319 | int inum, asnum; | |
320 | struct usb_interface_cache *intfc; | |
321 | struct usb_host_interface *alt; | |
322 | int i, n; | |
323 | int len, retval; | |
324 | int num_ep, num_ep_orig; | |
325 | ||
326 | d = (struct usb_interface_descriptor *) buffer; | |
327 | buffer += d->bLength; | |
328 | size -= d->bLength; | |
329 | ||
330 | if (d->bLength < USB_DT_INTERFACE_SIZE) | |
331 | goto skip_to_next_interface_descriptor; | |
332 | ||
333 | /* Which interface entry is this? */ | |
334 | intfc = NULL; | |
335 | inum = d->bInterfaceNumber; | |
336 | for (i = 0; i < config->desc.bNumInterfaces; ++i) { | |
337 | if (inums[i] == inum) { | |
338 | intfc = config->intf_cache[i]; | |
339 | break; | |
340 | } | |
341 | } | |
342 | if (!intfc || intfc->num_altsetting >= nalts[i]) | |
343 | goto skip_to_next_interface_descriptor; | |
344 | ||
345 | /* Check for duplicate altsetting entries */ | |
346 | asnum = d->bAlternateSetting; | |
347 | for ((i = 0, alt = &intfc->altsetting[0]); | |
348 | i < intfc->num_altsetting; | |
349 | (++i, ++alt)) { | |
350 | if (alt->desc.bAlternateSetting == asnum) { | |
351 | dev_warn(ddev, "Duplicate descriptor for config %d " | |
352 | "interface %d altsetting %d, skipping\n", | |
353 | cfgno, inum, asnum); | |
354 | goto skip_to_next_interface_descriptor; | |
355 | } | |
356 | } | |
357 | ||
358 | ++intfc->num_altsetting; | |
359 | memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE); | |
360 | ||
361 | /* Skip over any Class Specific or Vendor Specific descriptors; | |
362 | * find the first endpoint or interface descriptor */ | |
363 | alt->extra = buffer; | |
364 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
365 | USB_DT_INTERFACE, &n); | |
366 | alt->extralen = i; | |
367 | if (n > 0) | |
368 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
369 | n, plural(n), "interface"); | |
370 | buffer += i; | |
371 | size -= i; | |
372 | ||
373 | /* Allocate space for the right(?) number of endpoints */ | |
374 | num_ep = num_ep_orig = alt->desc.bNumEndpoints; | |
2c044a48 | 375 | alt->desc.bNumEndpoints = 0; /* Use as a counter */ |
1da177e4 LT |
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; | |
381 | } | |
382 | ||
2c044a48 GKH |
383 | if (num_ep > 0) { |
384 | /* Can't allocate 0 bytes */ | |
57a21c1b AS |
385 | len = sizeof(struct usb_host_endpoint) * num_ep; |
386 | alt->endpoint = kzalloc(len, GFP_KERNEL); | |
387 | if (!alt->endpoint) | |
388 | return -ENOMEM; | |
389 | } | |
1da177e4 LT |
390 | |
391 | /* Parse all the endpoint descriptors */ | |
392 | n = 0; | |
393 | while (size > 0) { | |
394 | if (((struct usb_descriptor_header *) buffer)->bDescriptorType | |
395 | == USB_DT_INTERFACE) | |
396 | break; | |
397 | retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt, | |
398 | num_ep, buffer, size); | |
399 | if (retval < 0) | |
400 | return retval; | |
401 | ++n; | |
402 | ||
403 | buffer += retval; | |
404 | size -= retval; | |
405 | } | |
406 | ||
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; | |
413 | ||
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; | |
418 | } | |
419 | ||
317149c6 | 420 | static int usb_parse_configuration(struct usb_device *dev, int cfgidx, |
1da177e4 LT |
421 | struct usb_host_config *config, unsigned char *buffer, int size) |
422 | { | |
317149c6 | 423 | struct device *ddev = &dev->dev; |
1da177e4 LT |
424 | unsigned char *buffer0 = buffer; |
425 | int cfgno; | |
426 | int nintf, nintf_orig; | |
427 | int i, j, n; | |
428 | struct usb_interface_cache *intfc; | |
429 | unsigned char *buffer2; | |
430 | int size2; | |
431 | struct usb_descriptor_header *header; | |
432 | int len, retval; | |
433 | u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; | |
165fe97e | 434 | unsigned iad_num = 0; |
1da177e4 LT |
435 | |
436 | memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); | |
437 | if (config->desc.bDescriptorType != USB_DT_CONFIG || | |
b4f17a48 HG |
438 | config->desc.bLength < USB_DT_CONFIG_SIZE || |
439 | config->desc.bLength > size) { | |
1da177e4 LT |
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); | |
443 | return -EINVAL; | |
444 | } | |
445 | cfgno = config->desc.bConfigurationValue; | |
446 | ||
447 | buffer += config->desc.bLength; | |
448 | size -= config->desc.bLength; | |
449 | ||
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; | |
456 | } | |
457 | ||
458 | /* Go through the descriptors, checking their length and counting the | |
459 | * number of altsettings for each interface */ | |
460 | n = 0; | |
461 | for ((buffer2 = buffer, size2 = size); | |
462 | size2 > 0; | |
463 | (buffer2 += header->bLength, size2 -= header->bLength)) { | |
464 | ||
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)); | |
469 | break; | |
470 | } | |
471 | ||
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); | |
477 | break; | |
478 | } | |
479 | ||
480 | if (header->bDescriptorType == USB_DT_INTERFACE) { | |
481 | struct usb_interface_descriptor *d; | |
482 | int inum; | |
483 | ||
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); | |
489 | continue; | |
490 | } | |
491 | ||
492 | inum = d->bInterfaceNumber; | |
317149c6 HG |
493 | |
494 | if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) && | |
495 | n >= nintf_orig) { | |
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); | |
500 | continue; | |
501 | } | |
502 | ||
1da177e4 LT |
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); | |
507 | ||
508 | /* Have we already encountered this interface? | |
509 | * Count its altsettings */ | |
510 | for (i = 0; i < n; ++i) { | |
511 | if (inums[i] == inum) | |
512 | break; | |
513 | } | |
514 | if (i < n) { | |
515 | if (nalts[i] < 255) | |
516 | ++nalts[i]; | |
517 | } else if (n < USB_MAXINTERFACES) { | |
518 | inums[n] = inum; | |
519 | nalts[n] = 1; | |
520 | ++n; | |
521 | } | |
522 | ||
165fe97e CN |
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); | |
530 | } else { | |
531 | config->intf_assoc[iad_num] = | |
532 | (struct usb_interface_assoc_descriptor | |
533 | *)header; | |
534 | iad_num++; | |
535 | } | |
536 | ||
1da177e4 LT |
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); | |
542 | ||
543 | } /* for ((buffer2 = buffer, size2 = size); ...) */ | |
544 | size = buffer2 - buffer; | |
545 | config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0); | |
546 | ||
547 | if (n != nintf) | |
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); | |
551 | else if (n == 0) | |
552 | dev_warn(ddev, "config %d has no interfaces?\n", cfgno); | |
553 | config->desc.bNumInterfaces = nintf = n; | |
554 | ||
555 | /* Check for missing interface numbers */ | |
556 | for (i = 0; i < nintf; ++i) { | |
557 | for (j = 0; j < nintf; ++j) { | |
558 | if (inums[j] == i) | |
559 | break; | |
560 | } | |
561 | if (j >= nintf) | |
562 | dev_warn(ddev, "config %d has no interface number " | |
563 | "%d\n", cfgno, i); | |
564 | } | |
565 | ||
566 | /* Allocate the usb_interface_caches and altsetting arrays */ | |
567 | for (i = 0; i < nintf; ++i) { | |
568 | j = nalts[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; | |
575 | } | |
576 | ||
577 | len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j; | |
0a1ef3b5 | 578 | config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
579 | if (!intfc) |
580 | return -ENOMEM; | |
1da177e4 LT |
581 | kref_init(&intfc->ref); |
582 | } | |
583 | ||
663c30d0 SS |
584 | /* FIXME: parse the BOS descriptor */ |
585 | ||
1da177e4 LT |
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; | |
592 | if (n > 0) | |
593 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
594 | n, plural(n), "configuration"); | |
595 | buffer += i; | |
596 | size -= i; | |
597 | ||
598 | /* Parse all the interface/altsetting descriptors */ | |
599 | while (size > 0) { | |
600 | retval = usb_parse_interface(ddev, cfgno, config, | |
601 | buffer, size, inums, nalts); | |
602 | if (retval < 0) | |
603 | return retval; | |
604 | ||
605 | buffer += retval; | |
606 | size -= retval; | |
607 | } | |
608 | ||
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) | |
616 | break; | |
617 | } | |
618 | if (n >= intfc->num_altsetting) | |
619 | dev_warn(ddev, "config %d interface %d has no " | |
620 | "altsetting %d\n", cfgno, inums[i], j); | |
621 | } | |
622 | } | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
2c044a48 GKH |
627 | /* hub-only!! ... and only exported for reset/reinit path. |
628 | * otherwise used internally on disconnect/destroy path | |
629 | */ | |
1da177e4 LT |
630 | void usb_destroy_configuration(struct usb_device *dev) |
631 | { | |
632 | int c, i; | |
633 | ||
634 | if (!dev->config) | |
635 | return; | |
636 | ||
637 | if (dev->rawdescriptors) { | |
638 | for (i = 0; i < dev->descriptor.bNumConfigurations; i++) | |
639 | kfree(dev->rawdescriptors[i]); | |
640 | ||
641 | kfree(dev->rawdescriptors); | |
642 | dev->rawdescriptors = NULL; | |
643 | } | |
644 | ||
645 | for (c = 0; c < dev->descriptor.bNumConfigurations; c++) { | |
646 | struct usb_host_config *cf = &dev->config[c]; | |
647 | ||
648 | kfree(cf->string); | |
1da177e4 LT |
649 | for (i = 0; i < cf->desc.bNumInterfaces; i++) { |
650 | if (cf->intf_cache[i]) | |
2c044a48 | 651 | kref_put(&cf->intf_cache[i]->ref, |
1da177e4 LT |
652 | usb_release_interface_cache); |
653 | } | |
654 | } | |
655 | kfree(dev->config); | |
656 | dev->config = NULL; | |
657 | } | |
658 | ||
659 | ||
1145065c IPG |
660 | /* |
661 | * Get the USB config descriptors, cache and parse'em | |
662 | * | |
663 | * hub-only!! ... and only in reset path, or usb_new_device() | |
664 | * (used by real hubs and virtual root hubs) | |
1145065c | 665 | */ |
1da177e4 LT |
666 | int usb_get_configuration(struct usb_device *dev) |
667 | { | |
668 | struct device *ddev = &dev->dev; | |
669 | int ncfg = dev->descriptor.bNumConfigurations; | |
1145065c | 670 | int result = 0; |
1da177e4 | 671 | unsigned int cfgno, length; |
1da177e4 | 672 | unsigned char *bigbuffer; |
2c044a48 | 673 | struct usb_config_descriptor *desc; |
1da177e4 | 674 | |
1145065c | 675 | cfgno = 0; |
1145065c | 676 | result = -ENOMEM; |
1da177e4 LT |
677 | if (ncfg > USB_MAXCONFIG) { |
678 | dev_warn(ddev, "too many configurations: %d, " | |
679 | "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); | |
680 | dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; | |
681 | } | |
682 | ||
683 | if (ncfg < 1) { | |
684 | dev_err(ddev, "no configurations\n"); | |
685 | return -EINVAL; | |
686 | } | |
687 | ||
688 | length = ncfg * sizeof(struct usb_host_config); | |
0a1ef3b5 | 689 | dev->config = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
690 | if (!dev->config) |
691 | goto err2; | |
1da177e4 LT |
692 | |
693 | length = ncfg * sizeof(char *); | |
0a1ef3b5 | 694 | dev->rawdescriptors = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
695 | if (!dev->rawdescriptors) |
696 | goto err2; | |
1da177e4 | 697 | |
e8f4af30 MN |
698 | desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL); |
699 | if (!desc) | |
1da177e4 | 700 | goto err2; |
1da177e4 | 701 | |
1145065c IPG |
702 | result = 0; |
703 | for (; cfgno < ncfg; cfgno++) { | |
1da177e4 LT |
704 | /* We grab just the first descriptor so we know how long |
705 | * the whole configuration is */ | |
706 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, | |
e8f4af30 | 707 | desc, USB_DT_CONFIG_SIZE); |
1da177e4 LT |
708 | if (result < 0) { |
709 | dev_err(ddev, "unable to read config index %d " | |
1145065c | 710 | "descriptor/%s: %d\n", cfgno, "start", result); |
3a22b872 LT |
711 | if (result != -EPIPE) |
712 | goto err; | |
cb4c8fe5 IPG |
713 | dev_err(ddev, "chopping to %d config(s)\n", cfgno); |
714 | dev->descriptor.bNumConfigurations = cfgno; | |
715 | break; | |
1da177e4 LT |
716 | } else if (result < 4) { |
717 | dev_err(ddev, "config index %d descriptor too short " | |
718 | "(expected %i, got %i)\n", cfgno, | |
719 | USB_DT_CONFIG_SIZE, result); | |
720 | result = -EINVAL; | |
721 | goto err; | |
722 | } | |
723 | length = max((int) le16_to_cpu(desc->wTotalLength), | |
724 | USB_DT_CONFIG_SIZE); | |
725 | ||
726 | /* Now that we know the length, get the whole thing */ | |
727 | bigbuffer = kmalloc(length, GFP_KERNEL); | |
728 | if (!bigbuffer) { | |
729 | result = -ENOMEM; | |
730 | goto err; | |
731 | } | |
d86db25e JW |
732 | |
733 | if (dev->quirks & USB_QUIRK_DELAY_INIT) | |
734 | msleep(100); | |
735 | ||
1da177e4 LT |
736 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, |
737 | bigbuffer, length); | |
738 | if (result < 0) { | |
739 | dev_err(ddev, "unable to read config index %d " | |
740 | "descriptor/%s\n", cfgno, "all"); | |
741 | kfree(bigbuffer); | |
742 | goto err; | |
743 | } | |
744 | if (result < length) { | |
745 | dev_warn(ddev, "config index %d descriptor too short " | |
746 | "(expected %i, got %i)\n", cfgno, length, result); | |
747 | length = result; | |
748 | } | |
749 | ||
750 | dev->rawdescriptors[cfgno] = bigbuffer; | |
751 | ||
317149c6 | 752 | result = usb_parse_configuration(dev, cfgno, |
1da177e4 LT |
753 | &dev->config[cfgno], bigbuffer, length); |
754 | if (result < 0) { | |
755 | ++cfgno; | |
756 | goto err; | |
757 | } | |
758 | } | |
759 | result = 0; | |
760 | ||
761 | err: | |
e8f4af30 | 762 | kfree(desc); |
1da177e4 LT |
763 | dev->descriptor.bNumConfigurations = cfgno; |
764 | err2: | |
765 | if (result == -ENOMEM) | |
766 | dev_err(ddev, "out of memory\n"); | |
767 | return result; | |
768 | } | |
3148bf04 AX |
769 | |
770 | void usb_release_bos_descriptor(struct usb_device *dev) | |
771 | { | |
772 | if (dev->bos) { | |
773 | kfree(dev->bos->desc); | |
774 | kfree(dev->bos); | |
775 | dev->bos = NULL; | |
776 | } | |
777 | } | |
778 | ||
779 | /* Get BOS descriptor set */ | |
780 | int usb_get_bos_descriptor(struct usb_device *dev) | |
781 | { | |
782 | struct device *ddev = &dev->dev; | |
783 | struct usb_bos_descriptor *bos; | |
784 | struct usb_dev_cap_header *cap; | |
785 | unsigned char *buffer; | |
786 | int length, total_len, num, i; | |
787 | int ret; | |
788 | ||
789 | bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL); | |
790 | if (!bos) | |
791 | return -ENOMEM; | |
792 | ||
793 | /* Get BOS descriptor */ | |
794 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE); | |
795 | if (ret < USB_DT_BOS_SIZE) { | |
796 | dev_err(ddev, "unable to get BOS descriptor\n"); | |
797 | if (ret >= 0) | |
798 | ret = -ENOMSG; | |
799 | kfree(bos); | |
800 | return ret; | |
801 | } | |
802 | ||
803 | length = bos->bLength; | |
804 | total_len = le16_to_cpu(bos->wTotalLength); | |
805 | num = bos->bNumDeviceCaps; | |
806 | kfree(bos); | |
807 | if (total_len < length) | |
808 | return -EINVAL; | |
809 | ||
810 | dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL); | |
811 | if (!dev->bos) | |
812 | return -ENOMEM; | |
813 | ||
814 | /* Now let's get the whole BOS descriptor set */ | |
815 | buffer = kzalloc(total_len, GFP_KERNEL); | |
816 | if (!buffer) { | |
817 | ret = -ENOMEM; | |
818 | goto err; | |
819 | } | |
820 | dev->bos->desc = (struct usb_bos_descriptor *)buffer; | |
821 | ||
822 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len); | |
823 | if (ret < total_len) { | |
824 | dev_err(ddev, "unable to get BOS descriptor set\n"); | |
825 | if (ret >= 0) | |
826 | ret = -ENOMSG; | |
827 | goto err; | |
828 | } | |
829 | total_len -= length; | |
830 | ||
831 | for (i = 0; i < num; i++) { | |
832 | buffer += length; | |
833 | cap = (struct usb_dev_cap_header *)buffer; | |
834 | length = cap->bLength; | |
835 | ||
836 | if (total_len < length) | |
837 | break; | |
838 | total_len -= length; | |
839 | ||
840 | if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { | |
841 | dev_warn(ddev, "descriptor type invalid, skip\n"); | |
842 | continue; | |
843 | } | |
844 | ||
845 | switch (cap->bDevCapabilityType) { | |
846 | case USB_CAP_TYPE_WIRELESS_USB: | |
847 | /* Wireless USB cap descriptor is handled by wusb */ | |
848 | break; | |
849 | case USB_CAP_TYPE_EXT: | |
850 | dev->bos->ext_cap = | |
851 | (struct usb_ext_cap_descriptor *)buffer; | |
852 | break; | |
853 | case USB_SS_CAP_TYPE: | |
854 | dev->bos->ss_cap = | |
855 | (struct usb_ss_cap_descriptor *)buffer; | |
856 | break; | |
3220befd MN |
857 | case USB_SSP_CAP_TYPE: |
858 | dev->bos->ssp_cap = | |
859 | (struct usb_ssp_cap_descriptor *)buffer; | |
860 | break; | |
3148bf04 AX |
861 | case CONTAINER_ID_TYPE: |
862 | dev->bos->ss_id = | |
863 | (struct usb_ss_container_id_descriptor *)buffer; | |
864 | break; | |
865 | default: | |
866 | break; | |
867 | } | |
868 | } | |
869 | ||
870 | return 0; | |
871 | ||
872 | err: | |
873 | usb_release_bos_descriptor(dev); | |
874 | return ret; | |
875 | } |