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