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 | ||
300871cd LP |
243 | /* Fix up bInterval values outside the legal range. Use 32 ms if no |
244 | * proper value can be guessed. */ | |
615ae11b AS |
245 | i = 0; /* i = min, j = max, n = default */ |
246 | j = 255; | |
247 | if (usb_endpoint_xfer_int(d)) { | |
248 | i = 1; | |
249 | switch (to_usb_device(ddev)->speed) { | |
8a1b2725 | 250 | case USB_SPEED_SUPER_PLUS: |
6b403b02 | 251 | case USB_SPEED_SUPER: |
615ae11b | 252 | case USB_SPEED_HIGH: |
300871cd LP |
253 | /* Many device manufacturers are using full-speed |
254 | * bInterval values in high-speed interrupt endpoint | |
255 | * descriptors. Try to fix those and fall back to a | |
256 | * 32 ms default value otherwise. */ | |
257 | n = fls(d->bInterval*8); | |
258 | if (n == 0) | |
259 | n = 9; /* 32 ms = 2^(9-1) uframes */ | |
615ae11b | 260 | j = 16; |
cd83ce9e JMI |
261 | |
262 | /* | |
263 | * Adjust bInterval for quirked devices. | |
264 | * This quirk fixes bIntervals reported in | |
265 | * linear microframes. | |
266 | */ | |
267 | if (to_usb_device(ddev)->quirks & | |
268 | USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL) { | |
269 | n = clamp(fls(d->bInterval), i, j); | |
270 | i = j = n; | |
271 | } | |
615ae11b AS |
272 | break; |
273 | default: /* USB_SPEED_FULL or _LOW */ | |
274 | /* For low-speed, 10 ms is the official minimum. | |
275 | * But some "overclocked" devices might want faster | |
276 | * polling so we'll allow it. */ | |
277 | n = 32; | |
278 | break; | |
279 | } | |
280 | } else if (usb_endpoint_xfer_isoc(d)) { | |
281 | i = 1; | |
282 | j = 16; | |
283 | switch (to_usb_device(ddev)->speed) { | |
284 | case USB_SPEED_HIGH: | |
285 | n = 9; /* 32 ms = 2^(9-1) uframes */ | |
286 | break; | |
287 | default: /* USB_SPEED_FULL */ | |
288 | n = 6; /* 32 ms = 2^(6-1) frames */ | |
289 | break; | |
290 | } | |
291 | } | |
292 | if (d->bInterval < i || d->bInterval > j) { | |
293 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
294 | "endpoint 0x%X has an invalid bInterval %d, " | |
295 | "changing to %d\n", | |
296 | cfgno, inum, asnum, | |
297 | d->bEndpointAddress, d->bInterval, n); | |
298 | endpoint->desc.bInterval = n; | |
299 | } | |
300 | ||
60aac1ec AS |
301 | /* Some buggy low-speed devices have Bulk endpoints, which is |
302 | * explicitly forbidden by the USB spec. In an attempt to make | |
303 | * them usable, we will try treating them as Interrupt endpoints. | |
304 | */ | |
305 | if (to_usb_device(ddev)->speed == USB_SPEED_LOW && | |
306 | usb_endpoint_xfer_bulk(d)) { | |
307 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
308 | "endpoint 0x%X is Bulk; changing to Interrupt\n", | |
309 | cfgno, inum, asnum, d->bEndpointAddress); | |
310 | endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT; | |
311 | endpoint->desc.bInterval = 1; | |
29cc8897 | 312 | if (usb_endpoint_maxp(&endpoint->desc) > 8) |
60aac1ec AS |
313 | endpoint->desc.wMaxPacketSize = cpu_to_le16(8); |
314 | } | |
315 | ||
aed9d65a AS |
316 | /* Validate the wMaxPacketSize field */ |
317 | maxp = usb_endpoint_maxp(&endpoint->desc); | |
318 | ||
319 | /* Find the highest legal maxpacket size for this endpoint */ | |
320 | i = 0; /* additional transactions per microframe */ | |
321 | switch (to_usb_device(ddev)->speed) { | |
322 | case USB_SPEED_LOW: | |
323 | maxpacket_maxes = low_speed_maxpacket_maxes; | |
324 | break; | |
325 | case USB_SPEED_FULL: | |
326 | maxpacket_maxes = full_speed_maxpacket_maxes; | |
327 | break; | |
328 | case USB_SPEED_HIGH: | |
329 | /* Bits 12..11 are allowed only for HS periodic endpoints */ | |
330 | if (usb_endpoint_xfer_int(d) || usb_endpoint_xfer_isoc(d)) { | |
331 | i = maxp & (BIT(12) | BIT(11)); | |
332 | maxp &= ~i; | |
333 | } | |
334 | /* fallthrough */ | |
335 | default: | |
336 | maxpacket_maxes = high_speed_maxpacket_maxes; | |
337 | break; | |
338 | case USB_SPEED_SUPER: | |
339 | case USB_SPEED_SUPER_PLUS: | |
340 | maxpacket_maxes = super_speed_maxpacket_maxes; | |
341 | break; | |
342 | } | |
343 | j = maxpacket_maxes[usb_endpoint_type(&endpoint->desc)]; | |
344 | ||
345 | if (maxp > j) { | |
346 | dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid maxpacket %d, setting to %d\n", | |
347 | cfgno, inum, asnum, d->bEndpointAddress, maxp, j); | |
348 | maxp = j; | |
349 | endpoint->desc.wMaxPacketSize = cpu_to_le16(i | maxp); | |
350 | } | |
351 | ||
caa9ef67 DB |
352 | /* |
353 | * Some buggy high speed devices have bulk endpoints using | |
354 | * maxpacket sizes other than 512. High speed HCDs may not | |
355 | * be able to handle that particular bug, so let's warn... | |
356 | */ | |
357 | if (to_usb_device(ddev)->speed == USB_SPEED_HIGH | |
358 | && usb_endpoint_xfer_bulk(d)) { | |
caa9ef67 DB |
359 | if (maxp != 512) |
360 | dev_warn(ddev, "config %d interface %d altsetting %d " | |
361 | "bulk endpoint 0x%X has invalid maxpacket %d\n", | |
362 | cfgno, inum, asnum, d->bEndpointAddress, | |
363 | maxp); | |
364 | } | |
663c30d0 | 365 | |
842f1690 | 366 | /* Parse a possible SuperSpeed endpoint companion descriptor */ |
8a1b2725 | 367 | if (to_usb_device(ddev)->speed >= USB_SPEED_SUPER) |
842f1690 AS |
368 | usb_parse_ss_endpoint_companion(ddev, cfgno, |
369 | inum, asnum, endpoint, buffer, size); | |
9f8e4438 | 370 | |
842f1690 AS |
371 | /* Skip over any Class Specific or Vendor Specific descriptors; |
372 | * find the next endpoint or interface descriptor */ | |
373 | endpoint->extra = buffer; | |
374 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
375 | USB_DT_INTERFACE, &n); | |
376 | endpoint->extralen = i; | |
377 | retval = buffer - buffer0 + i; | |
1da177e4 LT |
378 | if (n > 0) |
379 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
380 | n, plural(n), "endpoint"); | |
663c30d0 | 381 | return retval; |
1da177e4 LT |
382 | |
383 | skip_to_next_endpoint_or_interface_descriptor: | |
384 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
385 | USB_DT_INTERFACE, NULL); | |
386 | return buffer - buffer0 + i; | |
387 | } | |
388 | ||
389 | void usb_release_interface_cache(struct kref *ref) | |
390 | { | |
391 | struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref); | |
392 | int j; | |
393 | ||
4f62efe6 AS |
394 | for (j = 0; j < intfc->num_altsetting; j++) { |
395 | struct usb_host_interface *alt = &intfc->altsetting[j]; | |
396 | ||
397 | kfree(alt->endpoint); | |
398 | kfree(alt->string); | |
399 | } | |
1da177e4 LT |
400 | kfree(intfc); |
401 | } | |
402 | ||
403 | static int usb_parse_interface(struct device *ddev, int cfgno, | |
404 | struct usb_host_config *config, unsigned char *buffer, int size, | |
405 | u8 inums[], u8 nalts[]) | |
406 | { | |
407 | unsigned char *buffer0 = buffer; | |
408 | struct usb_interface_descriptor *d; | |
409 | int inum, asnum; | |
410 | struct usb_interface_cache *intfc; | |
411 | struct usb_host_interface *alt; | |
412 | int i, n; | |
413 | int len, retval; | |
414 | int num_ep, num_ep_orig; | |
415 | ||
416 | d = (struct usb_interface_descriptor *) buffer; | |
417 | buffer += d->bLength; | |
418 | size -= d->bLength; | |
419 | ||
420 | if (d->bLength < USB_DT_INTERFACE_SIZE) | |
421 | goto skip_to_next_interface_descriptor; | |
422 | ||
423 | /* Which interface entry is this? */ | |
424 | intfc = NULL; | |
425 | inum = d->bInterfaceNumber; | |
426 | for (i = 0; i < config->desc.bNumInterfaces; ++i) { | |
427 | if (inums[i] == inum) { | |
428 | intfc = config->intf_cache[i]; | |
429 | break; | |
430 | } | |
431 | } | |
432 | if (!intfc || intfc->num_altsetting >= nalts[i]) | |
433 | goto skip_to_next_interface_descriptor; | |
434 | ||
435 | /* Check for duplicate altsetting entries */ | |
436 | asnum = d->bAlternateSetting; | |
437 | for ((i = 0, alt = &intfc->altsetting[0]); | |
438 | i < intfc->num_altsetting; | |
439 | (++i, ++alt)) { | |
440 | if (alt->desc.bAlternateSetting == asnum) { | |
441 | dev_warn(ddev, "Duplicate descriptor for config %d " | |
442 | "interface %d altsetting %d, skipping\n", | |
443 | cfgno, inum, asnum); | |
444 | goto skip_to_next_interface_descriptor; | |
445 | } | |
446 | } | |
447 | ||
448 | ++intfc->num_altsetting; | |
449 | memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE); | |
450 | ||
451 | /* Skip over any Class Specific or Vendor Specific descriptors; | |
452 | * find the first endpoint or interface descriptor */ | |
453 | alt->extra = buffer; | |
454 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |
455 | USB_DT_INTERFACE, &n); | |
456 | alt->extralen = i; | |
457 | if (n > 0) | |
458 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
459 | n, plural(n), "interface"); | |
460 | buffer += i; | |
461 | size -= i; | |
462 | ||
463 | /* Allocate space for the right(?) number of endpoints */ | |
464 | num_ep = num_ep_orig = alt->desc.bNumEndpoints; | |
2c044a48 | 465 | alt->desc.bNumEndpoints = 0; /* Use as a counter */ |
1da177e4 LT |
466 | if (num_ep > USB_MAXENDPOINTS) { |
467 | dev_warn(ddev, "too many endpoints for config %d interface %d " | |
468 | "altsetting %d: %d, using maximum allowed: %d\n", | |
469 | cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS); | |
470 | num_ep = USB_MAXENDPOINTS; | |
471 | } | |
472 | ||
2c044a48 GKH |
473 | if (num_ep > 0) { |
474 | /* Can't allocate 0 bytes */ | |
57a21c1b AS |
475 | len = sizeof(struct usb_host_endpoint) * num_ep; |
476 | alt->endpoint = kzalloc(len, GFP_KERNEL); | |
477 | if (!alt->endpoint) | |
478 | return -ENOMEM; | |
479 | } | |
1da177e4 LT |
480 | |
481 | /* Parse all the endpoint descriptors */ | |
482 | n = 0; | |
483 | while (size > 0) { | |
484 | if (((struct usb_descriptor_header *) buffer)->bDescriptorType | |
485 | == USB_DT_INTERFACE) | |
486 | break; | |
487 | retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt, | |
488 | num_ep, buffer, size); | |
489 | if (retval < 0) | |
490 | return retval; | |
491 | ++n; | |
492 | ||
493 | buffer += retval; | |
494 | size -= retval; | |
495 | } | |
496 | ||
497 | if (n != num_ep_orig) | |
498 | dev_warn(ddev, "config %d interface %d altsetting %d has %d " | |
499 | "endpoint descriptor%s, different from the interface " | |
500 | "descriptor's value: %d\n", | |
501 | cfgno, inum, asnum, n, plural(n), num_ep_orig); | |
502 | return buffer - buffer0; | |
503 | ||
504 | skip_to_next_interface_descriptor: | |
505 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |
506 | USB_DT_INTERFACE, NULL); | |
507 | return buffer - buffer0 + i; | |
508 | } | |
509 | ||
317149c6 | 510 | static int usb_parse_configuration(struct usb_device *dev, int cfgidx, |
1da177e4 LT |
511 | struct usb_host_config *config, unsigned char *buffer, int size) |
512 | { | |
317149c6 | 513 | struct device *ddev = &dev->dev; |
1da177e4 LT |
514 | unsigned char *buffer0 = buffer; |
515 | int cfgno; | |
516 | int nintf, nintf_orig; | |
517 | int i, j, n; | |
518 | struct usb_interface_cache *intfc; | |
519 | unsigned char *buffer2; | |
520 | int size2; | |
521 | struct usb_descriptor_header *header; | |
522 | int len, retval; | |
523 | u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; | |
165fe97e | 524 | unsigned iad_num = 0; |
1da177e4 LT |
525 | |
526 | memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); | |
527 | if (config->desc.bDescriptorType != USB_DT_CONFIG || | |
b4f17a48 HG |
528 | config->desc.bLength < USB_DT_CONFIG_SIZE || |
529 | config->desc.bLength > size) { | |
1da177e4 LT |
530 | dev_err(ddev, "invalid descriptor for config index %d: " |
531 | "type = 0x%X, length = %d\n", cfgidx, | |
532 | config->desc.bDescriptorType, config->desc.bLength); | |
533 | return -EINVAL; | |
534 | } | |
535 | cfgno = config->desc.bConfigurationValue; | |
536 | ||
537 | buffer += config->desc.bLength; | |
538 | size -= config->desc.bLength; | |
539 | ||
540 | nintf = nintf_orig = config->desc.bNumInterfaces; | |
541 | if (nintf > USB_MAXINTERFACES) { | |
542 | dev_warn(ddev, "config %d has too many interfaces: %d, " | |
543 | "using maximum allowed: %d\n", | |
544 | cfgno, nintf, USB_MAXINTERFACES); | |
545 | nintf = USB_MAXINTERFACES; | |
546 | } | |
547 | ||
548 | /* Go through the descriptors, checking their length and counting the | |
549 | * number of altsettings for each interface */ | |
550 | n = 0; | |
551 | for ((buffer2 = buffer, size2 = size); | |
552 | size2 > 0; | |
553 | (buffer2 += header->bLength, size2 -= header->bLength)) { | |
554 | ||
555 | if (size2 < sizeof(struct usb_descriptor_header)) { | |
556 | dev_warn(ddev, "config %d descriptor has %d excess " | |
557 | "byte%s, ignoring\n", | |
558 | cfgno, size2, plural(size2)); | |
559 | break; | |
560 | } | |
561 | ||
562 | header = (struct usb_descriptor_header *) buffer2; | |
563 | if ((header->bLength > size2) || (header->bLength < 2)) { | |
564 | dev_warn(ddev, "config %d has an invalid descriptor " | |
565 | "of length %d, skipping remainder of the config\n", | |
566 | cfgno, header->bLength); | |
567 | break; | |
568 | } | |
569 | ||
570 | if (header->bDescriptorType == USB_DT_INTERFACE) { | |
571 | struct usb_interface_descriptor *d; | |
572 | int inum; | |
573 | ||
574 | d = (struct usb_interface_descriptor *) header; | |
575 | if (d->bLength < USB_DT_INTERFACE_SIZE) { | |
576 | dev_warn(ddev, "config %d has an invalid " | |
577 | "interface descriptor of length %d, " | |
578 | "skipping\n", cfgno, d->bLength); | |
579 | continue; | |
580 | } | |
581 | ||
582 | inum = d->bInterfaceNumber; | |
317149c6 HG |
583 | |
584 | if ((dev->quirks & USB_QUIRK_HONOR_BNUMINTERFACES) && | |
585 | n >= nintf_orig) { | |
586 | dev_warn(ddev, "config %d has more interface " | |
587 | "descriptors, than it declares in " | |
588 | "bNumInterfaces, ignoring interface " | |
589 | "number: %d\n", cfgno, inum); | |
590 | continue; | |
591 | } | |
592 | ||
1da177e4 LT |
593 | if (inum >= nintf_orig) |
594 | dev_warn(ddev, "config %d has an invalid " | |
595 | "interface number: %d but max is %d\n", | |
596 | cfgno, inum, nintf_orig - 1); | |
597 | ||
598 | /* Have we already encountered this interface? | |
599 | * Count its altsettings */ | |
600 | for (i = 0; i < n; ++i) { | |
601 | if (inums[i] == inum) | |
602 | break; | |
603 | } | |
604 | if (i < n) { | |
605 | if (nalts[i] < 255) | |
606 | ++nalts[i]; | |
607 | } else if (n < USB_MAXINTERFACES) { | |
608 | inums[n] = inum; | |
609 | nalts[n] = 1; | |
610 | ++n; | |
611 | } | |
612 | ||
165fe97e CN |
613 | } else if (header->bDescriptorType == |
614 | USB_DT_INTERFACE_ASSOCIATION) { | |
615 | if (iad_num == USB_MAXIADS) { | |
616 | dev_warn(ddev, "found more Interface " | |
617 | "Association Descriptors " | |
618 | "than allocated for in " | |
619 | "configuration %d\n", cfgno); | |
620 | } else { | |
621 | config->intf_assoc[iad_num] = | |
622 | (struct usb_interface_assoc_descriptor | |
623 | *)header; | |
624 | iad_num++; | |
625 | } | |
626 | ||
1da177e4 LT |
627 | } else if (header->bDescriptorType == USB_DT_DEVICE || |
628 | header->bDescriptorType == USB_DT_CONFIG) | |
629 | dev_warn(ddev, "config %d contains an unexpected " | |
630 | "descriptor of type 0x%X, skipping\n", | |
631 | cfgno, header->bDescriptorType); | |
632 | ||
633 | } /* for ((buffer2 = buffer, size2 = size); ...) */ | |
634 | size = buffer2 - buffer; | |
635 | config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0); | |
636 | ||
637 | if (n != nintf) | |
638 | dev_warn(ddev, "config %d has %d interface%s, different from " | |
639 | "the descriptor's value: %d\n", | |
640 | cfgno, n, plural(n), nintf_orig); | |
641 | else if (n == 0) | |
642 | dev_warn(ddev, "config %d has no interfaces?\n", cfgno); | |
643 | config->desc.bNumInterfaces = nintf = n; | |
644 | ||
645 | /* Check for missing interface numbers */ | |
646 | for (i = 0; i < nintf; ++i) { | |
647 | for (j = 0; j < nintf; ++j) { | |
648 | if (inums[j] == i) | |
649 | break; | |
650 | } | |
651 | if (j >= nintf) | |
652 | dev_warn(ddev, "config %d has no interface number " | |
653 | "%d\n", cfgno, i); | |
654 | } | |
655 | ||
656 | /* Allocate the usb_interface_caches and altsetting arrays */ | |
657 | for (i = 0; i < nintf; ++i) { | |
658 | j = nalts[i]; | |
659 | if (j > USB_MAXALTSETTING) { | |
660 | dev_warn(ddev, "too many alternate settings for " | |
661 | "config %d interface %d: %d, " | |
662 | "using maximum allowed: %d\n", | |
663 | cfgno, inums[i], j, USB_MAXALTSETTING); | |
664 | nalts[i] = j = USB_MAXALTSETTING; | |
665 | } | |
666 | ||
667 | len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j; | |
0a1ef3b5 | 668 | config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL); |
1da177e4 LT |
669 | if (!intfc) |
670 | return -ENOMEM; | |
1da177e4 LT |
671 | kref_init(&intfc->ref); |
672 | } | |
673 | ||
663c30d0 SS |
674 | /* FIXME: parse the BOS descriptor */ |
675 | ||
1da177e4 LT |
676 | /* Skip over any Class Specific or Vendor Specific descriptors; |
677 | * find the first interface descriptor */ | |
678 | config->extra = buffer; | |
679 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |
680 | USB_DT_INTERFACE, &n); | |
681 | config->extralen = i; | |
682 | if (n > 0) | |
683 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |
684 | n, plural(n), "configuration"); | |
685 | buffer += i; | |
686 | size -= i; | |
687 | ||
688 | /* Parse all the interface/altsetting descriptors */ | |
689 | while (size > 0) { | |
690 | retval = usb_parse_interface(ddev, cfgno, config, | |
691 | buffer, size, inums, nalts); | |
692 | if (retval < 0) | |
693 | return retval; | |
694 | ||
695 | buffer += retval; | |
696 | size -= retval; | |
697 | } | |
698 | ||
699 | /* Check for missing altsettings */ | |
700 | for (i = 0; i < nintf; ++i) { | |
701 | intfc = config->intf_cache[i]; | |
702 | for (j = 0; j < intfc->num_altsetting; ++j) { | |
703 | for (n = 0; n < intfc->num_altsetting; ++n) { | |
704 | if (intfc->altsetting[n].desc. | |
705 | bAlternateSetting == j) | |
706 | break; | |
707 | } | |
708 | if (n >= intfc->num_altsetting) | |
709 | dev_warn(ddev, "config %d interface %d has no " | |
710 | "altsetting %d\n", cfgno, inums[i], j); | |
711 | } | |
712 | } | |
713 | ||
714 | return 0; | |
715 | } | |
716 | ||
2c044a48 GKH |
717 | /* hub-only!! ... and only exported for reset/reinit path. |
718 | * otherwise used internally on disconnect/destroy path | |
719 | */ | |
1da177e4 LT |
720 | void usb_destroy_configuration(struct usb_device *dev) |
721 | { | |
722 | int c, i; | |
723 | ||
724 | if (!dev->config) | |
725 | return; | |
726 | ||
727 | if (dev->rawdescriptors) { | |
728 | for (i = 0; i < dev->descriptor.bNumConfigurations; i++) | |
729 | kfree(dev->rawdescriptors[i]); | |
730 | ||
731 | kfree(dev->rawdescriptors); | |
732 | dev->rawdescriptors = NULL; | |
733 | } | |
734 | ||
735 | for (c = 0; c < dev->descriptor.bNumConfigurations; c++) { | |
736 | struct usb_host_config *cf = &dev->config[c]; | |
737 | ||
738 | kfree(cf->string); | |
1da177e4 LT |
739 | for (i = 0; i < cf->desc.bNumInterfaces; i++) { |
740 | if (cf->intf_cache[i]) | |
2c044a48 | 741 | kref_put(&cf->intf_cache[i]->ref, |
1da177e4 LT |
742 | usb_release_interface_cache); |
743 | } | |
744 | } | |
745 | kfree(dev->config); | |
746 | dev->config = NULL; | |
747 | } | |
748 | ||
749 | ||
1145065c IPG |
750 | /* |
751 | * Get the USB config descriptors, cache and parse'em | |
752 | * | |
753 | * hub-only!! ... and only in reset path, or usb_new_device() | |
754 | * (used by real hubs and virtual root hubs) | |
1145065c | 755 | */ |
1da177e4 LT |
756 | int usb_get_configuration(struct usb_device *dev) |
757 | { | |
758 | struct device *ddev = &dev->dev; | |
759 | int ncfg = dev->descriptor.bNumConfigurations; | |
1145065c | 760 | int result = 0; |
1da177e4 | 761 | unsigned int cfgno, length; |
1da177e4 | 762 | unsigned char *bigbuffer; |
2c044a48 | 763 | struct usb_config_descriptor *desc; |
1da177e4 | 764 | |
1145065c | 765 | cfgno = 0; |
1145065c | 766 | result = -ENOMEM; |
1da177e4 LT |
767 | if (ncfg > USB_MAXCONFIG) { |
768 | dev_warn(ddev, "too many configurations: %d, " | |
769 | "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); | |
770 | dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; | |
771 | } | |
772 | ||
773 | if (ncfg < 1) { | |
774 | dev_err(ddev, "no configurations\n"); | |
775 | return -EINVAL; | |
776 | } | |
777 | ||
778 | length = ncfg * sizeof(struct usb_host_config); | |
0a1ef3b5 | 779 | dev->config = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
780 | if (!dev->config) |
781 | goto err2; | |
1da177e4 LT |
782 | |
783 | length = ncfg * sizeof(char *); | |
0a1ef3b5 | 784 | dev->rawdescriptors = kzalloc(length, GFP_KERNEL); |
1da177e4 LT |
785 | if (!dev->rawdescriptors) |
786 | goto err2; | |
1da177e4 | 787 | |
e8f4af30 MN |
788 | desc = kmalloc(USB_DT_CONFIG_SIZE, GFP_KERNEL); |
789 | if (!desc) | |
1da177e4 | 790 | goto err2; |
1da177e4 | 791 | |
1145065c IPG |
792 | result = 0; |
793 | for (; cfgno < ncfg; cfgno++) { | |
1da177e4 LT |
794 | /* We grab just the first descriptor so we know how long |
795 | * the whole configuration is */ | |
796 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, | |
e8f4af30 | 797 | desc, USB_DT_CONFIG_SIZE); |
1da177e4 LT |
798 | if (result < 0) { |
799 | dev_err(ddev, "unable to read config index %d " | |
1145065c | 800 | "descriptor/%s: %d\n", cfgno, "start", result); |
3a22b872 LT |
801 | if (result != -EPIPE) |
802 | goto err; | |
cb4c8fe5 IPG |
803 | dev_err(ddev, "chopping to %d config(s)\n", cfgno); |
804 | dev->descriptor.bNumConfigurations = cfgno; | |
805 | break; | |
1da177e4 LT |
806 | } else if (result < 4) { |
807 | dev_err(ddev, "config index %d descriptor too short " | |
808 | "(expected %i, got %i)\n", cfgno, | |
809 | USB_DT_CONFIG_SIZE, result); | |
810 | result = -EINVAL; | |
811 | goto err; | |
812 | } | |
813 | length = max((int) le16_to_cpu(desc->wTotalLength), | |
814 | USB_DT_CONFIG_SIZE); | |
815 | ||
816 | /* Now that we know the length, get the whole thing */ | |
817 | bigbuffer = kmalloc(length, GFP_KERNEL); | |
818 | if (!bigbuffer) { | |
819 | result = -ENOMEM; | |
820 | goto err; | |
821 | } | |
d86db25e JW |
822 | |
823 | if (dev->quirks & USB_QUIRK_DELAY_INIT) | |
824 | msleep(100); | |
825 | ||
1da177e4 LT |
826 | result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, |
827 | bigbuffer, length); | |
828 | if (result < 0) { | |
829 | dev_err(ddev, "unable to read config index %d " | |
830 | "descriptor/%s\n", cfgno, "all"); | |
831 | kfree(bigbuffer); | |
832 | goto err; | |
833 | } | |
834 | if (result < length) { | |
835 | dev_warn(ddev, "config index %d descriptor too short " | |
836 | "(expected %i, got %i)\n", cfgno, length, result); | |
837 | length = result; | |
838 | } | |
839 | ||
840 | dev->rawdescriptors[cfgno] = bigbuffer; | |
841 | ||
317149c6 | 842 | result = usb_parse_configuration(dev, cfgno, |
1da177e4 LT |
843 | &dev->config[cfgno], bigbuffer, length); |
844 | if (result < 0) { | |
845 | ++cfgno; | |
846 | goto err; | |
847 | } | |
848 | } | |
849 | result = 0; | |
850 | ||
851 | err: | |
e8f4af30 | 852 | kfree(desc); |
1da177e4 LT |
853 | dev->descriptor.bNumConfigurations = cfgno; |
854 | err2: | |
855 | if (result == -ENOMEM) | |
856 | dev_err(ddev, "out of memory\n"); | |
857 | return result; | |
858 | } | |
3148bf04 AX |
859 | |
860 | void usb_release_bos_descriptor(struct usb_device *dev) | |
861 | { | |
862 | if (dev->bos) { | |
863 | kfree(dev->bos->desc); | |
864 | kfree(dev->bos); | |
865 | dev->bos = NULL; | |
866 | } | |
867 | } | |
868 | ||
869 | /* Get BOS descriptor set */ | |
870 | int usb_get_bos_descriptor(struct usb_device *dev) | |
871 | { | |
872 | struct device *ddev = &dev->dev; | |
873 | struct usb_bos_descriptor *bos; | |
874 | struct usb_dev_cap_header *cap; | |
875 | unsigned char *buffer; | |
876 | int length, total_len, num, i; | |
877 | int ret; | |
878 | ||
879 | bos = kzalloc(sizeof(struct usb_bos_descriptor), GFP_KERNEL); | |
880 | if (!bos) | |
881 | return -ENOMEM; | |
882 | ||
883 | /* Get BOS descriptor */ | |
884 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, bos, USB_DT_BOS_SIZE); | |
885 | if (ret < USB_DT_BOS_SIZE) { | |
886 | dev_err(ddev, "unable to get BOS descriptor\n"); | |
887 | if (ret >= 0) | |
888 | ret = -ENOMSG; | |
889 | kfree(bos); | |
890 | return ret; | |
891 | } | |
892 | ||
893 | length = bos->bLength; | |
894 | total_len = le16_to_cpu(bos->wTotalLength); | |
895 | num = bos->bNumDeviceCaps; | |
896 | kfree(bos); | |
897 | if (total_len < length) | |
898 | return -EINVAL; | |
899 | ||
900 | dev->bos = kzalloc(sizeof(struct usb_host_bos), GFP_KERNEL); | |
901 | if (!dev->bos) | |
902 | return -ENOMEM; | |
903 | ||
904 | /* Now let's get the whole BOS descriptor set */ | |
905 | buffer = kzalloc(total_len, GFP_KERNEL); | |
906 | if (!buffer) { | |
907 | ret = -ENOMEM; | |
908 | goto err; | |
909 | } | |
910 | dev->bos->desc = (struct usb_bos_descriptor *)buffer; | |
911 | ||
912 | ret = usb_get_descriptor(dev, USB_DT_BOS, 0, buffer, total_len); | |
913 | if (ret < total_len) { | |
914 | dev_err(ddev, "unable to get BOS descriptor set\n"); | |
915 | if (ret >= 0) | |
916 | ret = -ENOMSG; | |
917 | goto err; | |
918 | } | |
919 | total_len -= length; | |
920 | ||
921 | for (i = 0; i < num; i++) { | |
922 | buffer += length; | |
923 | cap = (struct usb_dev_cap_header *)buffer; | |
924 | length = cap->bLength; | |
925 | ||
926 | if (total_len < length) | |
927 | break; | |
928 | total_len -= length; | |
929 | ||
930 | if (cap->bDescriptorType != USB_DT_DEVICE_CAPABILITY) { | |
931 | dev_warn(ddev, "descriptor type invalid, skip\n"); | |
932 | continue; | |
933 | } | |
934 | ||
935 | switch (cap->bDevCapabilityType) { | |
936 | case USB_CAP_TYPE_WIRELESS_USB: | |
937 | /* Wireless USB cap descriptor is handled by wusb */ | |
938 | break; | |
939 | case USB_CAP_TYPE_EXT: | |
940 | dev->bos->ext_cap = | |
941 | (struct usb_ext_cap_descriptor *)buffer; | |
942 | break; | |
943 | case USB_SS_CAP_TYPE: | |
944 | dev->bos->ss_cap = | |
945 | (struct usb_ss_cap_descriptor *)buffer; | |
946 | break; | |
3220befd MN |
947 | case USB_SSP_CAP_TYPE: |
948 | dev->bos->ssp_cap = | |
949 | (struct usb_ssp_cap_descriptor *)buffer; | |
950 | break; | |
3148bf04 AX |
951 | case CONTAINER_ID_TYPE: |
952 | dev->bos->ss_id = | |
953 | (struct usb_ss_container_id_descriptor *)buffer; | |
954 | break; | |
faee822c MN |
955 | case USB_PTM_CAP_TYPE: |
956 | dev->bos->ptm_cap = | |
957 | (struct usb_ptm_cap_descriptor *)buffer; | |
3148bf04 AX |
958 | default: |
959 | break; | |
960 | } | |
961 | } | |
962 | ||
963 | return 0; | |
964 | ||
965 | err: | |
966 | usb_release_bos_descriptor(dev); | |
967 | return ret; | |
968 | } |