Commit | Line | Data |
---|---|---|
40982be5 DB |
1 | /* |
2 | * composite.c - infrastructure for Composite USB Gadgets | |
3 | * | |
4 | * Copyright (C) 2006-2008 David Brownell | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
40982be5 DB |
10 | */ |
11 | ||
12 | /* #define VERBOSE_DEBUG */ | |
13 | ||
14 | #include <linux/kallsyms.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
6eb0de82 | 17 | #include <linux/module.h> |
40982be5 | 18 | #include <linux/device.h> |
ad1a8102 | 19 | #include <linux/utsname.h> |
40982be5 DB |
20 | |
21 | #include <linux/usb/composite.h> | |
bdb64d72 | 22 | #include <asm/unaligned.h> |
40982be5 | 23 | |
37a3a533 AP |
24 | #include "u_os_desc.h" |
25 | ||
19824d5e AP |
26 | /** |
27 | * struct usb_os_string - represents OS String to be reported by a gadget | |
28 | * @bLength: total length of the entire descritor, always 0x12 | |
29 | * @bDescriptorType: USB_DT_STRING | |
30 | * @qwSignature: the OS String proper | |
31 | * @bMS_VendorCode: code used by the host for subsequent requests | |
32 | * @bPad: not used, must be zero | |
33 | */ | |
34 | struct usb_os_string { | |
35 | __u8 bLength; | |
36 | __u8 bDescriptorType; | |
37 | __u8 qwSignature[OS_STRING_QW_SIGN_LEN]; | |
38 | __u8 bMS_VendorCode; | |
39 | __u8 bPad; | |
40 | } __packed; | |
41 | ||
40982be5 DB |
42 | /* |
43 | * The code in this file is utility code, used to build a gadget driver | |
44 | * from one or more "function" drivers, one or more "configuration" | |
45 | * objects, and a "usb_composite_driver" by gluing them together along | |
46 | * with the relevant device-wide data. | |
47 | */ | |
48 | ||
9bb2859f SAS |
49 | static struct usb_gadget_strings **get_containers_gs( |
50 | struct usb_gadget_string_container *uc) | |
51 | { | |
52 | return (struct usb_gadget_strings **)uc->stash; | |
53 | } | |
54 | ||
48767a4e TB |
55 | /** |
56 | * next_ep_desc() - advance to the next EP descriptor | |
57 | * @t: currect pointer within descriptor array | |
58 | * | |
59 | * Return: next EP descriptor or NULL | |
60 | * | |
61 | * Iterate over @t until either EP descriptor found or | |
62 | * NULL (that indicates end of list) encountered | |
63 | */ | |
64 | static struct usb_descriptor_header** | |
65 | next_ep_desc(struct usb_descriptor_header **t) | |
66 | { | |
67 | for (; *t; t++) { | |
68 | if ((*t)->bDescriptorType == USB_DT_ENDPOINT) | |
69 | return t; | |
70 | } | |
71 | return NULL; | |
72 | } | |
73 | ||
74 | /* | |
75 | * for_each_ep_desc()- iterate over endpoint descriptors in the | |
76 | * descriptors list | |
77 | * @start: pointer within descriptor array. | |
78 | * @ep_desc: endpoint descriptor to use as the loop cursor | |
79 | */ | |
80 | #define for_each_ep_desc(start, ep_desc) \ | |
81 | for (ep_desc = next_ep_desc(start); \ | |
82 | ep_desc; ep_desc = next_ep_desc(ep_desc+1)) | |
83 | ||
84 | /** | |
85 | * config_ep_by_speed() - configures the given endpoint | |
86 | * according to gadget speed. | |
87 | * @g: pointer to the gadget | |
88 | * @f: usb function | |
89 | * @_ep: the endpoint to configure | |
90 | * | |
91 | * Return: error code, 0 on success | |
92 | * | |
93 | * This function chooses the right descriptors for a given | |
94 | * endpoint according to gadget speed and saves it in the | |
95 | * endpoint desc field. If the endpoint already has a descriptor | |
96 | * assigned to it - overwrites it with currently corresponding | |
97 | * descriptor. The endpoint maxpacket field is updated according | |
98 | * to the chosen descriptor. | |
99 | * Note: the supplied function should hold all the descriptors | |
100 | * for supported speeds | |
101 | */ | |
102 | int config_ep_by_speed(struct usb_gadget *g, | |
103 | struct usb_function *f, | |
104 | struct usb_ep *_ep) | |
105 | { | |
b785ea7c | 106 | struct usb_composite_dev *cdev = get_gadget_data(g); |
48767a4e TB |
107 | struct usb_endpoint_descriptor *chosen_desc = NULL; |
108 | struct usb_descriptor_header **speed_desc = NULL; | |
109 | ||
bdb64d72 TB |
110 | struct usb_ss_ep_comp_descriptor *comp_desc = NULL; |
111 | int want_comp_desc = 0; | |
112 | ||
48767a4e TB |
113 | struct usb_descriptor_header **d_spd; /* cursor for speed desc */ |
114 | ||
115 | if (!g || !f || !_ep) | |
116 | return -EIO; | |
117 | ||
118 | /* select desired speed */ | |
119 | switch (g->speed) { | |
bdb64d72 TB |
120 | case USB_SPEED_SUPER: |
121 | if (gadget_is_superspeed(g)) { | |
122 | speed_desc = f->ss_descriptors; | |
123 | want_comp_desc = 1; | |
124 | break; | |
125 | } | |
126 | /* else: Fall trough */ | |
48767a4e TB |
127 | case USB_SPEED_HIGH: |
128 | if (gadget_is_dualspeed(g)) { | |
129 | speed_desc = f->hs_descriptors; | |
130 | break; | |
131 | } | |
132 | /* else: fall through */ | |
133 | default: | |
10287bae | 134 | speed_desc = f->fs_descriptors; |
48767a4e TB |
135 | } |
136 | /* find descriptors */ | |
137 | for_each_ep_desc(speed_desc, d_spd) { | |
138 | chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; | |
139 | if (chosen_desc->bEndpointAddress == _ep->address) | |
140 | goto ep_found; | |
141 | } | |
142 | return -EIO; | |
143 | ||
144 | ep_found: | |
145 | /* commit results */ | |
29cc8897 | 146 | _ep->maxpacket = usb_endpoint_maxp(chosen_desc); |
48767a4e | 147 | _ep->desc = chosen_desc; |
bdb64d72 TB |
148 | _ep->comp_desc = NULL; |
149 | _ep->maxburst = 0; | |
150 | _ep->mult = 0; | |
151 | if (!want_comp_desc) | |
152 | return 0; | |
48767a4e | 153 | |
bdb64d72 TB |
154 | /* |
155 | * Companion descriptor should follow EP descriptor | |
156 | * USB 3.0 spec, #9.6.7 | |
157 | */ | |
158 | comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); | |
159 | if (!comp_desc || | |
160 | (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) | |
161 | return -EIO; | |
162 | _ep->comp_desc = comp_desc; | |
163 | if (g->speed == USB_SPEED_SUPER) { | |
164 | switch (usb_endpoint_type(_ep->desc)) { | |
bdb64d72 TB |
165 | case USB_ENDPOINT_XFER_ISOC: |
166 | /* mult: bits 1:0 of bmAttributes */ | |
167 | _ep->mult = comp_desc->bmAttributes & 0x3; | |
9e878a6b PZ |
168 | case USB_ENDPOINT_XFER_BULK: |
169 | case USB_ENDPOINT_XFER_INT: | |
b785ea7c | 170 | _ep->maxburst = comp_desc->bMaxBurst + 1; |
bdb64d72 TB |
171 | break; |
172 | default: | |
b785ea7c FB |
173 | if (comp_desc->bMaxBurst != 0) |
174 | ERROR(cdev, "ep0 bMaxBurst must be 0\n"); | |
175 | _ep->maxburst = 1; | |
bdb64d72 TB |
176 | break; |
177 | } | |
178 | } | |
48767a4e TB |
179 | return 0; |
180 | } | |
721e2e91 | 181 | EXPORT_SYMBOL_GPL(config_ep_by_speed); |
40982be5 DB |
182 | |
183 | /** | |
184 | * usb_add_function() - add a function to a configuration | |
185 | * @config: the configuration | |
186 | * @function: the function being added | |
187 | * Context: single threaded during gadget setup | |
188 | * | |
189 | * After initialization, each configuration must have one or more | |
190 | * functions added to it. Adding a function involves calling its @bind() | |
191 | * method to allocate resources such as interface and string identifiers | |
192 | * and endpoints. | |
193 | * | |
194 | * This function returns the value of the function's bind(), which is | |
195 | * zero for success else a negative errno value. | |
196 | */ | |
28824b18 | 197 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
198 | struct usb_function *function) |
199 | { | |
200 | int value = -EINVAL; | |
201 | ||
202 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
203 | function->name, function, | |
204 | config->label, config); | |
205 | ||
206 | if (!function->set_alt || !function->disable) | |
207 | goto done; | |
208 | ||
209 | function->config = config; | |
210 | list_add_tail(&function->list, &config->functions); | |
211 | ||
212 | /* REVISIT *require* function->bind? */ | |
213 | if (function->bind) { | |
214 | value = function->bind(config, function); | |
215 | if (value < 0) { | |
216 | list_del(&function->list); | |
217 | function->config = NULL; | |
218 | } | |
219 | } else | |
220 | value = 0; | |
221 | ||
222 | /* We allow configurations that don't work at both speeds. | |
223 | * If we run into a lowspeed Linux system, treat it the same | |
224 | * as full speed ... it's the function drivers that will need | |
225 | * to avoid bulk and ISO transfers. | |
226 | */ | |
10287bae | 227 | if (!config->fullspeed && function->fs_descriptors) |
40982be5 DB |
228 | config->fullspeed = true; |
229 | if (!config->highspeed && function->hs_descriptors) | |
230 | config->highspeed = true; | |
bdb64d72 TB |
231 | if (!config->superspeed && function->ss_descriptors) |
232 | config->superspeed = true; | |
40982be5 DB |
233 | |
234 | done: | |
235 | if (value) | |
236 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
237 | function->name, function, value); | |
238 | return value; | |
239 | } | |
721e2e91 | 240 | EXPORT_SYMBOL_GPL(usb_add_function); |
40982be5 | 241 | |
b4735778 SAS |
242 | void usb_remove_function(struct usb_configuration *c, struct usb_function *f) |
243 | { | |
244 | if (f->disable) | |
245 | f->disable(f); | |
246 | ||
247 | bitmap_zero(f->endpoints, 32); | |
248 | list_del(&f->list); | |
249 | if (f->unbind) | |
250 | f->unbind(c, f); | |
251 | } | |
252 | EXPORT_SYMBOL_GPL(usb_remove_function); | |
253 | ||
60beed95 DB |
254 | /** |
255 | * usb_function_deactivate - prevent function and gadget enumeration | |
256 | * @function: the function that isn't yet ready to respond | |
257 | * | |
258 | * Blocks response of the gadget driver to host enumeration by | |
259 | * preventing the data line pullup from being activated. This is | |
260 | * normally called during @bind() processing to change from the | |
261 | * initial "ready to respond" state, or when a required resource | |
262 | * becomes available. | |
263 | * | |
264 | * For example, drivers that serve as a passthrough to a userspace | |
265 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
266 | * MTP, or print server) is ready to handle host requests. | |
267 | * | |
268 | * Not all systems support software control of their USB peripheral | |
269 | * data pullups. | |
270 | * | |
271 | * Returns zero on success, else negative errno. | |
272 | */ | |
273 | int usb_function_deactivate(struct usb_function *function) | |
274 | { | |
275 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 276 | unsigned long flags; |
60beed95 DB |
277 | int status = 0; |
278 | ||
b2bdf3a7 | 279 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
280 | |
281 | if (cdev->deactivations == 0) | |
282 | status = usb_gadget_disconnect(cdev->gadget); | |
283 | if (status == 0) | |
284 | cdev->deactivations++; | |
285 | ||
b2bdf3a7 | 286 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
287 | return status; |
288 | } | |
721e2e91 | 289 | EXPORT_SYMBOL_GPL(usb_function_deactivate); |
60beed95 DB |
290 | |
291 | /** | |
292 | * usb_function_activate - allow function and gadget enumeration | |
293 | * @function: function on which usb_function_activate() was called | |
294 | * | |
295 | * Reverses effect of usb_function_deactivate(). If no more functions | |
296 | * are delaying their activation, the gadget driver will respond to | |
297 | * host enumeration procedures. | |
298 | * | |
299 | * Returns zero on success, else negative errno. | |
300 | */ | |
301 | int usb_function_activate(struct usb_function *function) | |
302 | { | |
303 | struct usb_composite_dev *cdev = function->config->cdev; | |
4fefe9f6 | 304 | unsigned long flags; |
60beed95 DB |
305 | int status = 0; |
306 | ||
4fefe9f6 | 307 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
308 | |
309 | if (WARN_ON(cdev->deactivations == 0)) | |
310 | status = -EINVAL; | |
311 | else { | |
312 | cdev->deactivations--; | |
313 | if (cdev->deactivations == 0) | |
314 | status = usb_gadget_connect(cdev->gadget); | |
315 | } | |
316 | ||
4fefe9f6 | 317 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
318 | return status; |
319 | } | |
721e2e91 | 320 | EXPORT_SYMBOL_GPL(usb_function_activate); |
60beed95 | 321 | |
40982be5 DB |
322 | /** |
323 | * usb_interface_id() - allocate an unused interface ID | |
324 | * @config: configuration associated with the interface | |
325 | * @function: function handling the interface | |
326 | * Context: single threaded during gadget setup | |
327 | * | |
328 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
329 | * allocate new interface IDs. The function driver will then store that | |
330 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 331 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
332 | * particularly changing its altsetting via set_alt(). There may |
333 | * also be class-specific or vendor-specific requests to handle. | |
334 | * | |
335 | * All interface identifier should be allocated using this routine, to | |
336 | * ensure that for example different functions don't wrongly assign | |
337 | * different meanings to the same identifier. Note that since interface | |
25985edc | 338 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
339 | * one configuration (or more than once in a given configuration) need |
340 | * multiple versions of the relevant descriptors. | |
341 | * | |
342 | * Returns the interface ID which was allocated; or -ENODEV if no | |
343 | * more interface IDs can be allocated. | |
344 | */ | |
28824b18 | 345 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
346 | struct usb_function *function) |
347 | { | |
348 | unsigned id = config->next_interface_id; | |
349 | ||
350 | if (id < MAX_CONFIG_INTERFACES) { | |
351 | config->interface[id] = function; | |
352 | config->next_interface_id = id + 1; | |
353 | return id; | |
354 | } | |
355 | return -ENODEV; | |
356 | } | |
721e2e91 | 357 | EXPORT_SYMBOL_GPL(usb_interface_id); |
40982be5 | 358 | |
8f900a9a SAS |
359 | static u8 encode_bMaxPower(enum usb_device_speed speed, |
360 | struct usb_configuration *c) | |
361 | { | |
362 | unsigned val; | |
363 | ||
364 | if (c->MaxPower) | |
365 | val = c->MaxPower; | |
366 | else | |
367 | val = CONFIG_USB_GADGET_VBUS_DRAW; | |
368 | if (!val) | |
369 | return 0; | |
370 | switch (speed) { | |
371 | case USB_SPEED_SUPER: | |
372 | return DIV_ROUND_UP(val, 8); | |
373 | default: | |
374 | return DIV_ROUND_UP(val, 2); | |
2b84f92b | 375 | } |
8f900a9a SAS |
376 | } |
377 | ||
40982be5 DB |
378 | static int config_buf(struct usb_configuration *config, |
379 | enum usb_device_speed speed, void *buf, u8 type) | |
380 | { | |
381 | struct usb_config_descriptor *c = buf; | |
382 | void *next = buf + USB_DT_CONFIG_SIZE; | |
e13f17ff | 383 | int len; |
40982be5 DB |
384 | struct usb_function *f; |
385 | int status; | |
386 | ||
e13f17ff | 387 | len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE; |
40982be5 DB |
388 | /* write the config descriptor */ |
389 | c = buf; | |
390 | c->bLength = USB_DT_CONFIG_SIZE; | |
391 | c->bDescriptorType = type; | |
392 | /* wTotalLength is written later */ | |
393 | c->bNumInterfaces = config->next_interface_id; | |
394 | c->bConfigurationValue = config->bConfigurationValue; | |
395 | c->iConfiguration = config->iConfiguration; | |
396 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
8f900a9a | 397 | c->bMaxPower = encode_bMaxPower(speed, config); |
40982be5 DB |
398 | |
399 | /* There may be e.g. OTG descriptors */ | |
400 | if (config->descriptors) { | |
401 | status = usb_descriptor_fillbuf(next, len, | |
402 | config->descriptors); | |
403 | if (status < 0) | |
404 | return status; | |
405 | len -= status; | |
406 | next += status; | |
407 | } | |
408 | ||
409 | /* add each function's descriptors */ | |
410 | list_for_each_entry(f, &config->functions, list) { | |
411 | struct usb_descriptor_header **descriptors; | |
412 | ||
bdb64d72 TB |
413 | switch (speed) { |
414 | case USB_SPEED_SUPER: | |
415 | descriptors = f->ss_descriptors; | |
416 | break; | |
417 | case USB_SPEED_HIGH: | |
40982be5 | 418 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
419 | break; |
420 | default: | |
10287bae | 421 | descriptors = f->fs_descriptors; |
bdb64d72 TB |
422 | } |
423 | ||
40982be5 DB |
424 | if (!descriptors) |
425 | continue; | |
426 | status = usb_descriptor_fillbuf(next, len, | |
427 | (const struct usb_descriptor_header **) descriptors); | |
428 | if (status < 0) | |
429 | return status; | |
430 | len -= status; | |
431 | next += status; | |
432 | } | |
433 | ||
434 | len = next - buf; | |
435 | c->wTotalLength = cpu_to_le16(len); | |
436 | return len; | |
437 | } | |
438 | ||
439 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
440 | { | |
441 | struct usb_gadget *gadget = cdev->gadget; | |
442 | struct usb_configuration *c; | |
37a3a533 | 443 | struct list_head *pos; |
40982be5 DB |
444 | u8 type = w_value >> 8; |
445 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
446 | ||
bdb64d72 TB |
447 | if (gadget->speed == USB_SPEED_SUPER) |
448 | speed = gadget->speed; | |
449 | else if (gadget_is_dualspeed(gadget)) { | |
450 | int hs = 0; | |
40982be5 DB |
451 | if (gadget->speed == USB_SPEED_HIGH) |
452 | hs = 1; | |
453 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
454 | hs = !hs; | |
455 | if (hs) | |
456 | speed = USB_SPEED_HIGH; | |
457 | ||
458 | } | |
459 | ||
460 | /* This is a lookup by config *INDEX* */ | |
461 | w_value &= 0xff; | |
37a3a533 AP |
462 | |
463 | pos = &cdev->configs; | |
464 | c = cdev->os_desc_config; | |
465 | if (c) | |
466 | goto check_config; | |
467 | ||
468 | while ((pos = pos->next) != &cdev->configs) { | |
469 | c = list_entry(pos, typeof(*c), list); | |
470 | ||
471 | /* skip OS Descriptors config which is handled separately */ | |
472 | if (c == cdev->os_desc_config) | |
473 | continue; | |
474 | ||
475 | check_config: | |
40982be5 | 476 | /* ignore configs that won't work at this speed */ |
bdb64d72 TB |
477 | switch (speed) { |
478 | case USB_SPEED_SUPER: | |
479 | if (!c->superspeed) | |
480 | continue; | |
481 | break; | |
482 | case USB_SPEED_HIGH: | |
40982be5 DB |
483 | if (!c->highspeed) |
484 | continue; | |
bdb64d72 TB |
485 | break; |
486 | default: | |
40982be5 DB |
487 | if (!c->fullspeed) |
488 | continue; | |
489 | } | |
bdb64d72 | 490 | |
40982be5 DB |
491 | if (w_value == 0) |
492 | return config_buf(c, speed, cdev->req->buf, type); | |
493 | w_value--; | |
494 | } | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
499 | { | |
500 | struct usb_gadget *gadget = cdev->gadget; | |
501 | struct usb_configuration *c; | |
502 | unsigned count = 0; | |
503 | int hs = 0; | |
bdb64d72 | 504 | int ss = 0; |
40982be5 DB |
505 | |
506 | if (gadget_is_dualspeed(gadget)) { | |
507 | if (gadget->speed == USB_SPEED_HIGH) | |
508 | hs = 1; | |
bdb64d72 TB |
509 | if (gadget->speed == USB_SPEED_SUPER) |
510 | ss = 1; | |
40982be5 DB |
511 | if (type == USB_DT_DEVICE_QUALIFIER) |
512 | hs = !hs; | |
513 | } | |
514 | list_for_each_entry(c, &cdev->configs, list) { | |
515 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
516 | if (ss) { |
517 | if (!c->superspeed) | |
518 | continue; | |
519 | } else if (hs) { | |
40982be5 DB |
520 | if (!c->highspeed) |
521 | continue; | |
522 | } else { | |
523 | if (!c->fullspeed) | |
524 | continue; | |
525 | } | |
526 | count++; | |
527 | } | |
528 | return count; | |
529 | } | |
530 | ||
bdb64d72 TB |
531 | /** |
532 | * bos_desc() - prepares the BOS descriptor. | |
533 | * @cdev: pointer to usb_composite device to generate the bos | |
534 | * descriptor for | |
535 | * | |
536 | * This function generates the BOS (Binary Device Object) | |
537 | * descriptor and its device capabilities descriptors. The BOS | |
538 | * descriptor should be supported by a SuperSpeed device. | |
539 | */ | |
540 | static int bos_desc(struct usb_composite_dev *cdev) | |
541 | { | |
542 | struct usb_ext_cap_descriptor *usb_ext; | |
543 | struct usb_ss_cap_descriptor *ss_cap; | |
544 | struct usb_dcd_config_params dcd_config_params; | |
545 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
546 | ||
547 | bos->bLength = USB_DT_BOS_SIZE; | |
548 | bos->bDescriptorType = USB_DT_BOS; | |
549 | ||
550 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
551 | bos->bNumDeviceCaps = 0; | |
552 | ||
553 | /* | |
554 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
555 | * and shall support LPM when operating in USB2.0 HS mode. | |
556 | */ | |
557 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
558 | bos->bNumDeviceCaps++; | |
559 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
560 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
561 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
562 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
563 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT); | |
564 | ||
565 | /* | |
566 | * The Superspeed USB Capability descriptor shall be implemented by all | |
567 | * SuperSpeed devices. | |
568 | */ | |
569 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
570 | bos->bNumDeviceCaps++; | |
571 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
572 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
573 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
574 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
575 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
576 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
577 | USB_FULL_SPEED_OPERATION | | |
578 | USB_HIGH_SPEED_OPERATION | | |
579 | USB_5GBPS_OPERATION); | |
580 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
581 | ||
582 | /* Get Controller configuration */ | |
583 | if (cdev->gadget->ops->get_config_params) | |
584 | cdev->gadget->ops->get_config_params(&dcd_config_params); | |
585 | else { | |
089b837a | 586 | dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; |
bdb64d72 | 587 | dcd_config_params.bU2DevExitLat = |
089b837a | 588 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); |
bdb64d72 TB |
589 | } |
590 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
591 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
592 | ||
593 | return le16_to_cpu(bos->wTotalLength); | |
594 | } | |
595 | ||
40982be5 DB |
596 | static void device_qual(struct usb_composite_dev *cdev) |
597 | { | |
598 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
599 | ||
600 | qual->bLength = sizeof(*qual); | |
601 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
602 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
603 | qual->bcdUSB = cdev->desc.bcdUSB; | |
604 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
605 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
606 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
607 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 608 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 609 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 610 | qual->bRESERVED = 0; |
40982be5 DB |
611 | } |
612 | ||
613 | /*-------------------------------------------------------------------------*/ | |
614 | ||
615 | static void reset_config(struct usb_composite_dev *cdev) | |
616 | { | |
617 | struct usb_function *f; | |
618 | ||
619 | DBG(cdev, "reset config\n"); | |
620 | ||
621 | list_for_each_entry(f, &cdev->config->functions, list) { | |
622 | if (f->disable) | |
623 | f->disable(f); | |
5242658d LP |
624 | |
625 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
626 | } |
627 | cdev->config = NULL; | |
2bac51a1 | 628 | cdev->delayed_status = 0; |
40982be5 DB |
629 | } |
630 | ||
631 | static int set_config(struct usb_composite_dev *cdev, | |
632 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
633 | { | |
634 | struct usb_gadget *gadget = cdev->gadget; | |
635 | struct usb_configuration *c = NULL; | |
636 | int result = -EINVAL; | |
637 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
638 | int tmp; | |
639 | ||
40982be5 DB |
640 | if (number) { |
641 | list_for_each_entry(c, &cdev->configs, list) { | |
642 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
643 | /* |
644 | * We disable the FDs of the previous | |
645 | * configuration only if the new configuration | |
646 | * is a valid one | |
647 | */ | |
648 | if (cdev->config) | |
649 | reset_config(cdev); | |
40982be5 DB |
650 | result = 0; |
651 | break; | |
652 | } | |
653 | } | |
654 | if (result < 0) | |
655 | goto done; | |
bdb64d72 TB |
656 | } else { /* Zero configuration value - need to reset the config */ |
657 | if (cdev->config) | |
658 | reset_config(cdev); | |
40982be5 | 659 | result = 0; |
bdb64d72 | 660 | } |
40982be5 | 661 | |
e538dfda MN |
662 | INFO(cdev, "%s config #%d: %s\n", |
663 | usb_speed_string(gadget->speed), | |
664 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
665 | |
666 | if (!c) | |
667 | goto done; | |
668 | ||
6027f317 | 669 | usb_gadget_set_state(gadget, USB_STATE_CONFIGURED); |
40982be5 DB |
670 | cdev->config = c; |
671 | ||
672 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
673 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
674 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 675 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
676 | |
677 | if (!f) | |
678 | break; | |
679 | ||
5242658d LP |
680 | /* |
681 | * Record which endpoints are used by the function. This is used | |
682 | * to dispatch control requests targeted at that endpoint to the | |
683 | * function's setup callback instead of the current | |
684 | * configuration's setup callback. | |
685 | */ | |
bdb64d72 TB |
686 | switch (gadget->speed) { |
687 | case USB_SPEED_SUPER: | |
688 | descriptors = f->ss_descriptors; | |
689 | break; | |
690 | case USB_SPEED_HIGH: | |
5242658d | 691 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
692 | break; |
693 | default: | |
10287bae | 694 | descriptors = f->fs_descriptors; |
bdb64d72 | 695 | } |
5242658d LP |
696 | |
697 | for (; *descriptors; ++descriptors) { | |
698 | struct usb_endpoint_descriptor *ep; | |
699 | int addr; | |
700 | ||
701 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
702 | continue; | |
703 | ||
704 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
705 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
706 | | (ep->bEndpointAddress & 0x0f); | |
707 | set_bit(addr, f->endpoints); | |
708 | } | |
709 | ||
40982be5 DB |
710 | result = f->set_alt(f, tmp, 0); |
711 | if (result < 0) { | |
712 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
713 | tmp, f->name, f, result); | |
714 | ||
715 | reset_config(cdev); | |
716 | goto done; | |
717 | } | |
1b9ba000 RQ |
718 | |
719 | if (result == USB_GADGET_DELAYED_STATUS) { | |
720 | DBG(cdev, | |
721 | "%s: interface %d (%s) requested delayed status\n", | |
722 | __func__, tmp, f->name); | |
723 | cdev->delayed_status++; | |
724 | DBG(cdev, "delayed_status count %d\n", | |
725 | cdev->delayed_status); | |
726 | } | |
40982be5 DB |
727 | } |
728 | ||
729 | /* when we return, be sure our power usage is valid */ | |
8f900a9a | 730 | power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
731 | done: |
732 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
733 | if (result >= 0 && cdev->delayed_status) |
734 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
735 | return result; |
736 | } | |
737 | ||
de53c254 SAS |
738 | int usb_add_config_only(struct usb_composite_dev *cdev, |
739 | struct usb_configuration *config) | |
740 | { | |
741 | struct usb_configuration *c; | |
742 | ||
743 | if (!config->bConfigurationValue) | |
744 | return -EINVAL; | |
745 | ||
746 | /* Prevent duplicate configuration identifiers */ | |
747 | list_for_each_entry(c, &cdev->configs, list) { | |
748 | if (c->bConfigurationValue == config->bConfigurationValue) | |
749 | return -EBUSY; | |
750 | } | |
751 | ||
752 | config->cdev = cdev; | |
753 | list_add_tail(&config->list, &cdev->configs); | |
754 | ||
755 | INIT_LIST_HEAD(&config->functions); | |
756 | config->next_interface_id = 0; | |
757 | memset(config->interface, 0, sizeof(config->interface)); | |
758 | ||
759 | return 0; | |
760 | } | |
761 | EXPORT_SYMBOL_GPL(usb_add_config_only); | |
762 | ||
40982be5 DB |
763 | /** |
764 | * usb_add_config() - add a configuration to a device. | |
765 | * @cdev: wraps the USB gadget | |
766 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 767 | * @bind: the configuration's bind function |
40982be5 DB |
768 | * Context: single threaded during gadget setup |
769 | * | |
c9bfff9c | 770 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
771 | * add each of the configurations it supports, using this routine. |
772 | * | |
c9bfff9c | 773 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
774 | * is zero for success else a negative errno value. Binding configurations |
775 | * assigns global resources including string IDs, and per-configuration | |
776 | * resources such as interface IDs and endpoints. | |
777 | */ | |
28824b18 | 778 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
779 | struct usb_configuration *config, |
780 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
781 | { |
782 | int status = -EINVAL; | |
de53c254 SAS |
783 | |
784 | if (!bind) | |
785 | goto done; | |
40982be5 DB |
786 | |
787 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
788 | config->bConfigurationValue, | |
789 | config->label, config); | |
790 | ||
de53c254 SAS |
791 | status = usb_add_config_only(cdev, config); |
792 | if (status) | |
40982be5 DB |
793 | goto done; |
794 | ||
c9bfff9c | 795 | status = bind(config); |
40982be5 | 796 | if (status < 0) { |
124ef389 YO |
797 | while (!list_empty(&config->functions)) { |
798 | struct usb_function *f; | |
799 | ||
800 | f = list_first_entry(&config->functions, | |
801 | struct usb_function, list); | |
802 | list_del(&f->list); | |
803 | if (f->unbind) { | |
804 | DBG(cdev, "unbind function '%s'/%p\n", | |
805 | f->name, f); | |
806 | f->unbind(config, f); | |
807 | /* may free memory for "f" */ | |
808 | } | |
809 | } | |
40982be5 DB |
810 | list_del(&config->list); |
811 | config->cdev = NULL; | |
812 | } else { | |
813 | unsigned i; | |
814 | ||
bdb64d72 | 815 | DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", |
40982be5 | 816 | config->bConfigurationValue, config, |
bdb64d72 | 817 | config->superspeed ? " super" : "", |
40982be5 DB |
818 | config->highspeed ? " high" : "", |
819 | config->fullspeed | |
820 | ? (gadget_is_dualspeed(cdev->gadget) | |
821 | ? " full" | |
822 | : " full/low") | |
823 | : ""); | |
824 | ||
825 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
826 | struct usb_function *f = config->interface[i]; | |
827 | ||
828 | if (!f) | |
829 | continue; | |
830 | DBG(cdev, " interface %d = %s/%p\n", | |
831 | i, f->name, f); | |
832 | } | |
833 | } | |
834 | ||
c9bfff9c | 835 | /* set_alt(), or next bind(), sets up |
40982be5 DB |
836 | * ep->driver_data as needed. |
837 | */ | |
838 | usb_ep_autoconfig_reset(cdev->gadget); | |
839 | ||
840 | done: | |
841 | if (status) | |
842 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
843 | config->bConfigurationValue, status); | |
844 | return status; | |
845 | } | |
721e2e91 | 846 | EXPORT_SYMBOL_GPL(usb_add_config); |
40982be5 | 847 | |
51cce6fc BG |
848 | static void remove_config(struct usb_composite_dev *cdev, |
849 | struct usb_configuration *config) | |
850 | { | |
851 | while (!list_empty(&config->functions)) { | |
852 | struct usb_function *f; | |
853 | ||
854 | f = list_first_entry(&config->functions, | |
855 | struct usb_function, list); | |
856 | list_del(&f->list); | |
857 | if (f->unbind) { | |
858 | DBG(cdev, "unbind function '%s'/%p\n", f->name, f); | |
859 | f->unbind(config, f); | |
860 | /* may free memory for "f" */ | |
861 | } | |
862 | } | |
863 | list_del(&config->list); | |
864 | if (config->unbind) { | |
865 | DBG(cdev, "unbind config '%s'/%p\n", config->label, config); | |
866 | config->unbind(config); | |
867 | /* may free memory for "c" */ | |
868 | } | |
869 | } | |
870 | ||
871 | /** | |
872 | * usb_remove_config() - remove a configuration from a device. | |
873 | * @cdev: wraps the USB gadget | |
874 | * @config: the configuration | |
875 | * | |
876 | * Drivers must call usb_gadget_disconnect before calling this function | |
877 | * to disconnect the device from the host and make sure the host will not | |
878 | * try to enumerate the device while we are changing the config list. | |
879 | */ | |
880 | void usb_remove_config(struct usb_composite_dev *cdev, | |
881 | struct usb_configuration *config) | |
882 | { | |
883 | unsigned long flags; | |
884 | ||
885 | spin_lock_irqsave(&cdev->lock, flags); | |
886 | ||
887 | if (cdev->config == config) | |
888 | reset_config(cdev); | |
889 | ||
890 | spin_unlock_irqrestore(&cdev->lock, flags); | |
891 | ||
892 | remove_config(cdev, config); | |
893 | } | |
894 | ||
40982be5 DB |
895 | /*-------------------------------------------------------------------------*/ |
896 | ||
897 | /* We support strings in multiple languages ... string descriptor zero | |
898 | * says which languages are supported. The typical case will be that | |
899 | * only one language (probably English) is used, with I18N handled on | |
900 | * the host side. | |
901 | */ | |
902 | ||
903 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
904 | { | |
905 | const struct usb_gadget_strings *s; | |
20c5e74c | 906 | __le16 language; |
40982be5 DB |
907 | __le16 *tmp; |
908 | ||
909 | while (*sp) { | |
910 | s = *sp; | |
911 | language = cpu_to_le16(s->language); | |
912 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
913 | if (*tmp == language) | |
914 | goto repeat; | |
915 | } | |
916 | *tmp++ = language; | |
917 | repeat: | |
918 | sp++; | |
919 | } | |
920 | } | |
921 | ||
922 | static int lookup_string( | |
923 | struct usb_gadget_strings **sp, | |
924 | void *buf, | |
925 | u16 language, | |
926 | int id | |
927 | ) | |
928 | { | |
929 | struct usb_gadget_strings *s; | |
930 | int value; | |
931 | ||
932 | while (*sp) { | |
933 | s = *sp++; | |
934 | if (s->language != language) | |
935 | continue; | |
936 | value = usb_gadget_get_string(s, id, buf); | |
937 | if (value > 0) | |
938 | return value; | |
939 | } | |
940 | return -EINVAL; | |
941 | } | |
942 | ||
943 | static int get_string(struct usb_composite_dev *cdev, | |
944 | void *buf, u16 language, int id) | |
945 | { | |
ffe0b335 | 946 | struct usb_composite_driver *composite = cdev->driver; |
9bb2859f | 947 | struct usb_gadget_string_container *uc; |
40982be5 DB |
948 | struct usb_configuration *c; |
949 | struct usb_function *f; | |
950 | int len; | |
951 | ||
952 | /* Yes, not only is USB's I18N support probably more than most | |
953 | * folk will ever care about ... also, it's all supported here. | |
954 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
955 | */ | |
956 | ||
957 | /* 0 == report all available language codes */ | |
958 | if (id == 0) { | |
959 | struct usb_string_descriptor *s = buf; | |
960 | struct usb_gadget_strings **sp; | |
961 | ||
962 | memset(s, 0, 256); | |
963 | s->bDescriptorType = USB_DT_STRING; | |
964 | ||
965 | sp = composite->strings; | |
966 | if (sp) | |
967 | collect_langs(sp, s->wData); | |
968 | ||
969 | list_for_each_entry(c, &cdev->configs, list) { | |
970 | sp = c->strings; | |
971 | if (sp) | |
972 | collect_langs(sp, s->wData); | |
973 | ||
974 | list_for_each_entry(f, &c->functions, list) { | |
975 | sp = f->strings; | |
976 | if (sp) | |
977 | collect_langs(sp, s->wData); | |
978 | } | |
979 | } | |
27a46633 SAS |
980 | list_for_each_entry(uc, &cdev->gstrings, list) { |
981 | struct usb_gadget_strings **sp; | |
982 | ||
983 | sp = get_containers_gs(uc); | |
984 | collect_langs(sp, s->wData); | |
985 | } | |
40982be5 | 986 | |
417b57b3 | 987 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
988 | continue; |
989 | if (!len) | |
990 | return -EINVAL; | |
991 | ||
992 | s->bLength = 2 * (len + 1); | |
993 | return s->bLength; | |
994 | } | |
995 | ||
19824d5e AP |
996 | if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) { |
997 | struct usb_os_string *b = buf; | |
998 | b->bLength = sizeof(*b); | |
999 | b->bDescriptorType = USB_DT_STRING; | |
1000 | compiletime_assert( | |
1001 | sizeof(b->qwSignature) == sizeof(cdev->qw_sign), | |
1002 | "qwSignature size must be equal to qw_sign"); | |
1003 | memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature)); | |
1004 | b->bMS_VendorCode = cdev->b_vendor_code; | |
1005 | b->bPad = 0; | |
1006 | return sizeof(*b); | |
1007 | } | |
1008 | ||
9bb2859f SAS |
1009 | list_for_each_entry(uc, &cdev->gstrings, list) { |
1010 | struct usb_gadget_strings **sp; | |
1011 | ||
1012 | sp = get_containers_gs(uc); | |
1013 | len = lookup_string(sp, buf, language, id); | |
1014 | if (len > 0) | |
1015 | return len; | |
1016 | } | |
1017 | ||
ad1a8102 MN |
1018 | /* String IDs are device-scoped, so we look up each string |
1019 | * table we're told about. These lookups are infrequent; | |
1020 | * simpler-is-better here. | |
40982be5 DB |
1021 | */ |
1022 | if (composite->strings) { | |
1023 | len = lookup_string(composite->strings, buf, language, id); | |
1024 | if (len > 0) | |
1025 | return len; | |
1026 | } | |
1027 | list_for_each_entry(c, &cdev->configs, list) { | |
1028 | if (c->strings) { | |
1029 | len = lookup_string(c->strings, buf, language, id); | |
1030 | if (len > 0) | |
1031 | return len; | |
1032 | } | |
1033 | list_for_each_entry(f, &c->functions, list) { | |
1034 | if (!f->strings) | |
1035 | continue; | |
1036 | len = lookup_string(f->strings, buf, language, id); | |
1037 | if (len > 0) | |
1038 | return len; | |
1039 | } | |
1040 | } | |
1041 | return -EINVAL; | |
1042 | } | |
1043 | ||
1044 | /** | |
1045 | * usb_string_id() - allocate an unused string ID | |
1046 | * @cdev: the device whose string descriptor IDs are being allocated | |
1047 | * Context: single threaded during gadget setup | |
1048 | * | |
1049 | * @usb_string_id() is called from bind() callbacks to allocate | |
1050 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1051 | * then store that ID in the appropriate descriptors and string table. | |
1052 | * | |
f2adc4f8 MN |
1053 | * All string identifier should be allocated using this, |
1054 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
1055 | * that for example different functions don't wrongly assign different | |
1056 | * meanings to the same identifier. | |
40982be5 | 1057 | */ |
28824b18 | 1058 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
1059 | { |
1060 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
1061 | /* string id 0 is reserved by USB spec for list of |
1062 | * supported languages */ | |
1063 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
1064 | cdev->next_string_id++; |
1065 | return cdev->next_string_id; | |
1066 | } | |
1067 | return -ENODEV; | |
1068 | } | |
721e2e91 | 1069 | EXPORT_SYMBOL_GPL(usb_string_id); |
40982be5 | 1070 | |
f2adc4f8 MN |
1071 | /** |
1072 | * usb_string_ids() - allocate unused string IDs in batch | |
1073 | * @cdev: the device whose string descriptor IDs are being allocated | |
1074 | * @str: an array of usb_string objects to assign numbers to | |
1075 | * Context: single threaded during gadget setup | |
1076 | * | |
1077 | * @usb_string_ids() is called from bind() callbacks to allocate | |
1078 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1079 | * then copy IDs from the string table to the appropriate descriptors | |
1080 | * and string table for other languages. | |
1081 | * | |
1082 | * All string identifier should be allocated using this, | |
1083 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1084 | * example different functions don't wrongly assign different meanings | |
1085 | * to the same identifier. | |
1086 | */ | |
1087 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
1088 | { | |
1089 | int next = cdev->next_string_id; | |
1090 | ||
1091 | for (; str->s; ++str) { | |
1092 | if (unlikely(next >= 254)) | |
1093 | return -ENODEV; | |
1094 | str->id = ++next; | |
1095 | } | |
1096 | ||
1097 | cdev->next_string_id = next; | |
1098 | ||
1099 | return 0; | |
1100 | } | |
721e2e91 | 1101 | EXPORT_SYMBOL_GPL(usb_string_ids_tab); |
f2adc4f8 | 1102 | |
9bb2859f SAS |
1103 | static struct usb_gadget_string_container *copy_gadget_strings( |
1104 | struct usb_gadget_strings **sp, unsigned n_gstrings, | |
1105 | unsigned n_strings) | |
1106 | { | |
1107 | struct usb_gadget_string_container *uc; | |
1108 | struct usb_gadget_strings **gs_array; | |
1109 | struct usb_gadget_strings *gs; | |
1110 | struct usb_string *s; | |
1111 | unsigned mem; | |
1112 | unsigned n_gs; | |
1113 | unsigned n_s; | |
1114 | void *stash; | |
1115 | ||
1116 | mem = sizeof(*uc); | |
1117 | mem += sizeof(void *) * (n_gstrings + 1); | |
1118 | mem += sizeof(struct usb_gadget_strings) * n_gstrings; | |
1119 | mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings); | |
1120 | uc = kmalloc(mem, GFP_KERNEL); | |
1121 | if (!uc) | |
1122 | return ERR_PTR(-ENOMEM); | |
1123 | gs_array = get_containers_gs(uc); | |
1124 | stash = uc->stash; | |
1125 | stash += sizeof(void *) * (n_gstrings + 1); | |
1126 | for (n_gs = 0; n_gs < n_gstrings; n_gs++) { | |
1127 | struct usb_string *org_s; | |
1128 | ||
1129 | gs_array[n_gs] = stash; | |
1130 | gs = gs_array[n_gs]; | |
1131 | stash += sizeof(struct usb_gadget_strings); | |
1132 | gs->language = sp[n_gs]->language; | |
1133 | gs->strings = stash; | |
1134 | org_s = sp[n_gs]->strings; | |
1135 | ||
1136 | for (n_s = 0; n_s < n_strings; n_s++) { | |
1137 | s = stash; | |
1138 | stash += sizeof(struct usb_string); | |
1139 | if (org_s->s) | |
1140 | s->s = org_s->s; | |
1141 | else | |
1142 | s->s = ""; | |
1143 | org_s++; | |
1144 | } | |
1145 | s = stash; | |
1146 | s->s = NULL; | |
1147 | stash += sizeof(struct usb_string); | |
1148 | ||
1149 | } | |
1150 | gs_array[n_gs] = NULL; | |
1151 | return uc; | |
1152 | } | |
1153 | ||
1154 | /** | |
1155 | * usb_gstrings_attach() - attach gadget strings to a cdev and assign ids | |
1156 | * @cdev: the device whose string descriptor IDs are being allocated | |
1157 | * and attached. | |
1158 | * @sp: an array of usb_gadget_strings to attach. | |
1159 | * @n_strings: number of entries in each usb_strings array (sp[]->strings) | |
1160 | * | |
1161 | * This function will create a deep copy of usb_gadget_strings and usb_string | |
1162 | * and attach it to the cdev. The actual string (usb_string.s) will not be | |
1163 | * copied but only a referenced will be made. The struct usb_gadget_strings | |
1164 | * array may contain multiple languges and should be NULL terminated. | |
1165 | * The ->language pointer of each struct usb_gadget_strings has to contain the | |
1166 | * same amount of entries. | |
1167 | * For instance: sp[0] is en-US, sp[1] is es-ES. It is expected that the first | |
1168 | * usb_string entry of es-ES containts the translation of the first usb_string | |
1169 | * entry of en-US. Therefore both entries become the same id assign. | |
1170 | */ | |
1171 | struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, | |
1172 | struct usb_gadget_strings **sp, unsigned n_strings) | |
1173 | { | |
1174 | struct usb_gadget_string_container *uc; | |
1175 | struct usb_gadget_strings **n_gs; | |
1176 | unsigned n_gstrings = 0; | |
1177 | unsigned i; | |
1178 | int ret; | |
1179 | ||
1180 | for (i = 0; sp[i]; i++) | |
1181 | n_gstrings++; | |
1182 | ||
1183 | if (!n_gstrings) | |
1184 | return ERR_PTR(-EINVAL); | |
1185 | ||
1186 | uc = copy_gadget_strings(sp, n_gstrings, n_strings); | |
1187 | if (IS_ERR(uc)) | |
dad4babe | 1188 | return ERR_CAST(uc); |
9bb2859f SAS |
1189 | |
1190 | n_gs = get_containers_gs(uc); | |
1191 | ret = usb_string_ids_tab(cdev, n_gs[0]->strings); | |
1192 | if (ret) | |
1193 | goto err; | |
1194 | ||
1195 | for (i = 1; i < n_gstrings; i++) { | |
1196 | struct usb_string *m_s; | |
1197 | struct usb_string *s; | |
1198 | unsigned n; | |
1199 | ||
1200 | m_s = n_gs[0]->strings; | |
1201 | s = n_gs[i]->strings; | |
1202 | for (n = 0; n < n_strings; n++) { | |
1203 | s->id = m_s->id; | |
1204 | s++; | |
1205 | m_s++; | |
1206 | } | |
1207 | } | |
1208 | list_add_tail(&uc->list, &cdev->gstrings); | |
1209 | return n_gs[0]->strings; | |
1210 | err: | |
1211 | kfree(uc); | |
1212 | return ERR_PTR(ret); | |
1213 | } | |
1214 | EXPORT_SYMBOL_GPL(usb_gstrings_attach); | |
1215 | ||
f2adc4f8 MN |
1216 | /** |
1217 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 1218 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
1219 | * @n: number of string IDs to allocate |
1220 | * Context: single threaded during gadget setup | |
1221 | * | |
1222 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 1223 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
1224 | * is, returns last requested ID which is now very useful information. |
1225 | * | |
1226 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
1227 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1228 | * then store that ID in the appropriate descriptors and string table. | |
1229 | * | |
1230 | * All string identifier should be allocated using this, | |
1231 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1232 | * example different functions don't wrongly assign different meanings | |
1233 | * to the same identifier. | |
1234 | */ | |
1235 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
1236 | { | |
1237 | unsigned next = c->next_string_id; | |
1238 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
1239 | return -ENODEV; | |
1240 | c->next_string_id += n; | |
1241 | return next + 1; | |
1242 | } | |
721e2e91 | 1243 | EXPORT_SYMBOL_GPL(usb_string_ids_n); |
f2adc4f8 | 1244 | |
40982be5 DB |
1245 | /*-------------------------------------------------------------------------*/ |
1246 | ||
1247 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1248 | { | |
1249 | if (req->status || req->actual != req->length) | |
1250 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1251 | "setup complete --> %d, %d/%d\n", | |
1252 | req->status, req->actual, req->length); | |
1253 | } | |
1254 | ||
37a3a533 AP |
1255 | static int count_ext_compat(struct usb_configuration *c) |
1256 | { | |
1257 | int i, res; | |
1258 | ||
1259 | res = 0; | |
1260 | for (i = 0; i < c->next_interface_id; ++i) { | |
1261 | struct usb_function *f; | |
1262 | int j; | |
1263 | ||
1264 | f = c->interface[i]; | |
1265 | for (j = 0; j < f->os_desc_n; ++j) { | |
1266 | struct usb_os_desc *d; | |
1267 | ||
1268 | if (i != f->os_desc_table[j].if_id) | |
1269 | continue; | |
1270 | d = f->os_desc_table[j].os_desc; | |
1271 | if (d && d->ext_compat_id) | |
1272 | ++res; | |
1273 | } | |
1274 | } | |
1275 | BUG_ON(res > 255); | |
1276 | return res; | |
1277 | } | |
1278 | ||
1279 | static void fill_ext_compat(struct usb_configuration *c, u8 *buf) | |
1280 | { | |
1281 | int i, count; | |
1282 | ||
1283 | count = 16; | |
1284 | for (i = 0; i < c->next_interface_id; ++i) { | |
1285 | struct usb_function *f; | |
1286 | int j; | |
1287 | ||
1288 | f = c->interface[i]; | |
1289 | for (j = 0; j < f->os_desc_n; ++j) { | |
1290 | struct usb_os_desc *d; | |
1291 | ||
1292 | if (i != f->os_desc_table[j].if_id) | |
1293 | continue; | |
1294 | d = f->os_desc_table[j].os_desc; | |
1295 | if (d && d->ext_compat_id) { | |
1296 | *buf++ = i; | |
1297 | *buf++ = 0x01; | |
1298 | memcpy(buf, d->ext_compat_id, 16); | |
1299 | buf += 22; | |
1300 | } else { | |
1301 | ++buf; | |
1302 | *buf = 0x01; | |
1303 | buf += 23; | |
1304 | } | |
1305 | count += 24; | |
1306 | if (count >= 4096) | |
1307 | return; | |
1308 | } | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | static int count_ext_prop(struct usb_configuration *c, int interface) | |
1313 | { | |
1314 | struct usb_function *f; | |
849b1333 | 1315 | int j; |
37a3a533 AP |
1316 | |
1317 | f = c->interface[interface]; | |
1318 | for (j = 0; j < f->os_desc_n; ++j) { | |
1319 | struct usb_os_desc *d; | |
1320 | ||
1321 | if (interface != f->os_desc_table[j].if_id) | |
1322 | continue; | |
1323 | d = f->os_desc_table[j].os_desc; | |
1324 | if (d && d->ext_compat_id) | |
1325 | return d->ext_prop_count; | |
1326 | } | |
849b1333 | 1327 | return 0; |
37a3a533 AP |
1328 | } |
1329 | ||
1330 | static int len_ext_prop(struct usb_configuration *c, int interface) | |
1331 | { | |
1332 | struct usb_function *f; | |
1333 | struct usb_os_desc *d; | |
1334 | int j, res; | |
1335 | ||
1336 | res = 10; /* header length */ | |
1337 | f = c->interface[interface]; | |
1338 | for (j = 0; j < f->os_desc_n; ++j) { | |
1339 | if (interface != f->os_desc_table[j].if_id) | |
1340 | continue; | |
1341 | d = f->os_desc_table[j].os_desc; | |
1342 | if (d) | |
1343 | return min(res + d->ext_prop_len, 4096); | |
1344 | } | |
1345 | return res; | |
1346 | } | |
1347 | ||
1348 | static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf) | |
1349 | { | |
1350 | struct usb_function *f; | |
1351 | struct usb_os_desc *d; | |
1352 | struct usb_os_desc_ext_prop *ext_prop; | |
1353 | int j, count, n, ret; | |
1354 | u8 *start = buf; | |
1355 | ||
1356 | f = c->interface[interface]; | |
1357 | for (j = 0; j < f->os_desc_n; ++j) { | |
1358 | if (interface != f->os_desc_table[j].if_id) | |
1359 | continue; | |
1360 | d = f->os_desc_table[j].os_desc; | |
1361 | if (d) | |
1362 | list_for_each_entry(ext_prop, &d->ext_prop, entry) { | |
1363 | /* 4kB minus header length */ | |
1364 | n = buf - start; | |
1365 | if (n >= 4086) | |
1366 | return 0; | |
1367 | ||
1368 | count = ext_prop->data_len + | |
1369 | ext_prop->name_len + 14; | |
1370 | if (count > 4086 - n) | |
1371 | return -EINVAL; | |
1372 | usb_ext_prop_put_size(buf, count); | |
1373 | usb_ext_prop_put_type(buf, ext_prop->type); | |
1374 | ret = usb_ext_prop_put_name(buf, ext_prop->name, | |
1375 | ext_prop->name_len); | |
1376 | if (ret < 0) | |
1377 | return ret; | |
1378 | switch (ext_prop->type) { | |
1379 | case USB_EXT_PROP_UNICODE: | |
1380 | case USB_EXT_PROP_UNICODE_ENV: | |
1381 | case USB_EXT_PROP_UNICODE_LINK: | |
1382 | usb_ext_prop_put_unicode(buf, ret, | |
1383 | ext_prop->data, | |
1384 | ext_prop->data_len); | |
1385 | break; | |
1386 | case USB_EXT_PROP_BINARY: | |
1387 | usb_ext_prop_put_binary(buf, ret, | |
1388 | ext_prop->data, | |
1389 | ext_prop->data_len); | |
1390 | break; | |
1391 | case USB_EXT_PROP_LE32: | |
1392 | /* not implemented */ | |
1393 | case USB_EXT_PROP_BE32: | |
1394 | /* not implemented */ | |
1395 | default: | |
1396 | return -EINVAL; | |
1397 | } | |
1398 | buf += count; | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | return 0; | |
1403 | } | |
1404 | ||
40982be5 DB |
1405 | /* |
1406 | * The setup() callback implements all the ep0 functionality that's | |
1407 | * not handled lower down, in hardware or the hardware driver(like | |
1408 | * device and endpoint feature flags, and their status). It's all | |
1409 | * housekeeping for the gadget function we're implementing. Most of | |
1410 | * the work is in config and function specific setup. | |
1411 | */ | |
2d5a8899 | 1412 | int |
40982be5 DB |
1413 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) |
1414 | { | |
1415 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1416 | struct usb_request *req = cdev->req; | |
1417 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1418 | int status = 0; |
40982be5 | 1419 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1420 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1421 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1422 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1423 | struct usb_function *f = NULL; | |
5242658d | 1424 | u8 endp; |
40982be5 DB |
1425 | |
1426 | /* partial re-init of the response message; the function or the | |
1427 | * gadget might need to intercept e.g. a control-OUT completion | |
1428 | * when we delegate to it. | |
1429 | */ | |
1430 | req->zero = 0; | |
1431 | req->complete = composite_setup_complete; | |
2edb11cb | 1432 | req->length = 0; |
40982be5 DB |
1433 | gadget->ep0->driver_data = cdev; |
1434 | ||
1435 | switch (ctrl->bRequest) { | |
1436 | ||
1437 | /* we handle all standard USB descriptors */ | |
1438 | case USB_REQ_GET_DESCRIPTOR: | |
1439 | if (ctrl->bRequestType != USB_DIR_IN) | |
1440 | goto unknown; | |
1441 | switch (w_value >> 8) { | |
1442 | ||
1443 | case USB_DT_DEVICE: | |
1444 | cdev->desc.bNumConfigurations = | |
1445 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1446 | cdev->desc.bMaxPacketSize0 = |
1447 | cdev->gadget->ep0->maxpacket; | |
1448 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1449 | if (gadget->speed >= USB_SPEED_SUPER) { |
bdb64d72 | 1450 | cdev->desc.bcdUSB = cpu_to_le16(0x0300); |
a8f21156 SAS |
1451 | cdev->desc.bMaxPacketSize0 = 9; |
1452 | } else { | |
bdb64d72 | 1453 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1454 | } |
bdb64d72 TB |
1455 | } |
1456 | ||
40982be5 DB |
1457 | value = min(w_length, (u16) sizeof cdev->desc); |
1458 | memcpy(req->buf, &cdev->desc, value); | |
1459 | break; | |
1460 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1461 | if (!gadget_is_dualspeed(gadget) || |
1462 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1463 | break; |
1464 | device_qual(cdev); | |
1465 | value = min_t(int, w_length, | |
1466 | sizeof(struct usb_qualifier_descriptor)); | |
1467 | break; | |
1468 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1469 | if (!gadget_is_dualspeed(gadget) || |
1470 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1471 | break; |
1472 | /* FALLTHROUGH */ | |
1473 | case USB_DT_CONFIG: | |
1474 | value = config_desc(cdev, w_value); | |
1475 | if (value >= 0) | |
1476 | value = min(w_length, (u16) value); | |
1477 | break; | |
1478 | case USB_DT_STRING: | |
1479 | value = get_string(cdev, req->buf, | |
1480 | w_index, w_value & 0xff); | |
1481 | if (value >= 0) | |
1482 | value = min(w_length, (u16) value); | |
1483 | break; | |
bdb64d72 TB |
1484 | case USB_DT_BOS: |
1485 | if (gadget_is_superspeed(gadget)) { | |
1486 | value = bos_desc(cdev); | |
1487 | value = min(w_length, (u16) value); | |
1488 | } | |
1489 | break; | |
40982be5 DB |
1490 | } |
1491 | break; | |
1492 | ||
1493 | /* any number of configs can work */ | |
1494 | case USB_REQ_SET_CONFIGURATION: | |
1495 | if (ctrl->bRequestType != 0) | |
1496 | goto unknown; | |
1497 | if (gadget_is_otg(gadget)) { | |
1498 | if (gadget->a_hnp_support) | |
1499 | DBG(cdev, "HNP available\n"); | |
1500 | else if (gadget->a_alt_hnp_support) | |
1501 | DBG(cdev, "HNP on another port\n"); | |
1502 | else | |
1503 | VDBG(cdev, "HNP inactive\n"); | |
1504 | } | |
1505 | spin_lock(&cdev->lock); | |
1506 | value = set_config(cdev, ctrl, w_value); | |
1507 | spin_unlock(&cdev->lock); | |
1508 | break; | |
1509 | case USB_REQ_GET_CONFIGURATION: | |
1510 | if (ctrl->bRequestType != USB_DIR_IN) | |
1511 | goto unknown; | |
1512 | if (cdev->config) | |
1513 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1514 | else | |
1515 | *(u8 *)req->buf = 0; | |
1516 | value = min(w_length, (u16) 1); | |
1517 | break; | |
1518 | ||
1519 | /* function drivers must handle get/set altsetting; if there's | |
1520 | * no get() method, we know only altsetting zero works. | |
1521 | */ | |
1522 | case USB_REQ_SET_INTERFACE: | |
1523 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1524 | goto unknown; | |
ff085de7 | 1525 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1526 | break; |
08889517 | 1527 | f = cdev->config->interface[intf]; |
40982be5 DB |
1528 | if (!f) |
1529 | break; | |
dd4dff8b | 1530 | if (w_value && !f->set_alt) |
40982be5 DB |
1531 | break; |
1532 | value = f->set_alt(f, w_index, w_value); | |
1b9ba000 RQ |
1533 | if (value == USB_GADGET_DELAYED_STATUS) { |
1534 | DBG(cdev, | |
1535 | "%s: interface %d (%s) requested delayed status\n", | |
1536 | __func__, intf, f->name); | |
1537 | cdev->delayed_status++; | |
1538 | DBG(cdev, "delayed_status count %d\n", | |
1539 | cdev->delayed_status); | |
1540 | } | |
40982be5 DB |
1541 | break; |
1542 | case USB_REQ_GET_INTERFACE: | |
1543 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1544 | goto unknown; | |
ff085de7 | 1545 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1546 | break; |
08889517 | 1547 | f = cdev->config->interface[intf]; |
40982be5 DB |
1548 | if (!f) |
1549 | break; | |
1550 | /* lots of interfaces only need altsetting zero... */ | |
1551 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1552 | if (value < 0) | |
1553 | break; | |
1554 | *((u8 *)req->buf) = value; | |
1555 | value = min(w_length, (u16) 1); | |
1556 | break; | |
bdb64d72 TB |
1557 | |
1558 | /* | |
1559 | * USB 3.0 additions: | |
1560 | * Function driver should handle get_status request. If such cb | |
1561 | * wasn't supplied we respond with default value = 0 | |
1562 | * Note: function driver should supply such cb only for the first | |
1563 | * interface of the function | |
1564 | */ | |
1565 | case USB_REQ_GET_STATUS: | |
1566 | if (!gadget_is_superspeed(gadget)) | |
1567 | goto unknown; | |
1568 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1569 | goto unknown; | |
1570 | value = 2; /* This is the length of the get_status reply */ | |
1571 | put_unaligned_le16(0, req->buf); | |
1572 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1573 | break; | |
1574 | f = cdev->config->interface[intf]; | |
1575 | if (!f) | |
1576 | break; | |
1577 | status = f->get_status ? f->get_status(f) : 0; | |
1578 | if (status < 0) | |
1579 | break; | |
1580 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1581 | break; | |
1582 | /* | |
1583 | * Function drivers should handle SetFeature/ClearFeature | |
1584 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1585 | * only for the first interface of the function | |
1586 | */ | |
1587 | case USB_REQ_CLEAR_FEATURE: | |
1588 | case USB_REQ_SET_FEATURE: | |
1589 | if (!gadget_is_superspeed(gadget)) | |
1590 | goto unknown; | |
1591 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1592 | goto unknown; | |
1593 | switch (w_value) { | |
1594 | case USB_INTRF_FUNC_SUSPEND: | |
1595 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1596 | break; | |
1597 | f = cdev->config->interface[intf]; | |
1598 | if (!f) | |
1599 | break; | |
1600 | value = 0; | |
1601 | if (f->func_suspend) | |
1602 | value = f->func_suspend(f, w_index >> 8); | |
1603 | if (value < 0) { | |
1604 | ERROR(cdev, | |
1605 | "func_suspend() returned error %d\n", | |
1606 | value); | |
1607 | value = 0; | |
1608 | } | |
1609 | break; | |
1610 | } | |
1611 | break; | |
40982be5 DB |
1612 | default: |
1613 | unknown: | |
37a3a533 AP |
1614 | /* |
1615 | * OS descriptors handling | |
1616 | */ | |
1617 | if (cdev->use_os_string && cdev->os_desc_config && | |
1618 | (ctrl->bRequest & USB_TYPE_VENDOR) && | |
1619 | ctrl->bRequest == cdev->b_vendor_code) { | |
1620 | struct usb_request *req; | |
1621 | struct usb_configuration *os_desc_cfg; | |
1622 | u8 *buf; | |
1623 | int interface; | |
1624 | int count = 0; | |
1625 | ||
1626 | req = cdev->os_desc_req; | |
1627 | req->complete = composite_setup_complete; | |
1628 | buf = req->buf; | |
1629 | os_desc_cfg = cdev->os_desc_config; | |
1630 | memset(buf, 0, w_length); | |
1631 | buf[5] = 0x01; | |
1632 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1633 | case USB_RECIP_DEVICE: | |
1634 | if (w_index != 0x4 || (w_value >> 8)) | |
1635 | break; | |
1636 | buf[6] = w_index; | |
1637 | if (w_length == 0x10) { | |
1638 | /* Number of ext compat interfaces */ | |
1639 | count = count_ext_compat(os_desc_cfg); | |
1640 | buf[8] = count; | |
1641 | count *= 24; /* 24 B/ext compat desc */ | |
1642 | count += 16; /* header */ | |
1643 | put_unaligned_le32(count, buf); | |
1644 | value = w_length; | |
1645 | } else { | |
1646 | /* "extended compatibility ID"s */ | |
1647 | count = count_ext_compat(os_desc_cfg); | |
1648 | buf[8] = count; | |
1649 | count *= 24; /* 24 B/ext compat desc */ | |
1650 | count += 16; /* header */ | |
1651 | put_unaligned_le32(count, buf); | |
1652 | buf += 16; | |
1653 | fill_ext_compat(os_desc_cfg, buf); | |
1654 | value = w_length; | |
1655 | } | |
1656 | break; | |
1657 | case USB_RECIP_INTERFACE: | |
1658 | if (w_index != 0x5 || (w_value >> 8)) | |
1659 | break; | |
1660 | interface = w_value & 0xFF; | |
1661 | buf[6] = w_index; | |
1662 | if (w_length == 0x0A) { | |
1663 | count = count_ext_prop(os_desc_cfg, | |
1664 | interface); | |
1665 | put_unaligned_le16(count, buf + 8); | |
1666 | count = len_ext_prop(os_desc_cfg, | |
1667 | interface); | |
1668 | put_unaligned_le32(count, buf); | |
1669 | ||
1670 | value = w_length; | |
1671 | } else { | |
1672 | count = count_ext_prop(os_desc_cfg, | |
1673 | interface); | |
1674 | put_unaligned_le16(count, buf + 8); | |
1675 | count = len_ext_prop(os_desc_cfg, | |
1676 | interface); | |
1677 | put_unaligned_le32(count, buf); | |
1678 | buf += 10; | |
1679 | value = fill_ext_prop(os_desc_cfg, | |
1680 | interface, buf); | |
1681 | if (value < 0) | |
1682 | return value; | |
1683 | ||
1684 | value = w_length; | |
1685 | } | |
1686 | break; | |
1687 | } | |
1688 | req->length = value; | |
1689 | req->zero = value < w_length; | |
1690 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1691 | if (value < 0) { | |
1692 | DBG(cdev, "ep_queue --> %d\n", value); | |
1693 | req->status = 0; | |
1694 | composite_setup_complete(gadget->ep0, req); | |
1695 | } | |
1696 | return value; | |
1697 | } | |
1698 | ||
40982be5 DB |
1699 | VDBG(cdev, |
1700 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1701 | ctrl->bRequestType, ctrl->bRequest, | |
1702 | w_value, w_index, w_length); | |
1703 | ||
5242658d LP |
1704 | /* functions always handle their interfaces and endpoints... |
1705 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 DB |
1706 | * configuration code. |
1707 | * | |
1708 | * REVISIT it could make sense to let the composite device | |
1709 | * take such requests too, if that's ever needed: to work | |
1710 | * in config 0, etc. | |
1711 | */ | |
5242658d LP |
1712 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1713 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1714 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1715 | break; |
1716 | f = cdev->config->interface[intf]; | |
5242658d LP |
1717 | break; |
1718 | ||
1719 | case USB_RECIP_ENDPOINT: | |
1720 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); | |
1721 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1722 | if (test_bit(endp, f->endpoints)) | |
1723 | break; | |
1724 | } | |
1725 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1726 | f = NULL; |
5242658d | 1727 | break; |
40982be5 | 1728 | } |
5242658d LP |
1729 | |
1730 | if (f && f->setup) | |
1731 | value = f->setup(f, ctrl); | |
1732 | else { | |
40982be5 DB |
1733 | struct usb_configuration *c; |
1734 | ||
1735 | c = cdev->config; | |
a01091e5 AP |
1736 | if (!c) |
1737 | goto done; | |
1738 | ||
1739 | /* try current config's setup */ | |
1740 | if (c->setup) { | |
40982be5 | 1741 | value = c->setup(c, ctrl); |
a01091e5 AP |
1742 | goto done; |
1743 | } | |
1744 | ||
1745 | /* try the only function in the current config */ | |
1746 | if (!list_is_singular(&c->functions)) | |
1747 | goto done; | |
1748 | f = list_first_entry(&c->functions, struct usb_function, | |
1749 | list); | |
1750 | if (f->setup) | |
1751 | value = f->setup(f, ctrl); | |
40982be5 DB |
1752 | } |
1753 | ||
1754 | goto done; | |
1755 | } | |
1756 | ||
1757 | /* respond with data transfer before status phase? */ | |
1b9ba000 | 1758 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 DB |
1759 | req->length = value; |
1760 | req->zero = value < w_length; | |
1761 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1762 | if (value < 0) { | |
1763 | DBG(cdev, "ep_queue --> %d\n", value); | |
1764 | req->status = 0; | |
1765 | composite_setup_complete(gadget->ep0, req); | |
1766 | } | |
1b9ba000 RQ |
1767 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1768 | WARN(cdev, | |
1769 | "%s: Delayed status not supported for w_length != 0", | |
1770 | __func__); | |
40982be5 DB |
1771 | } |
1772 | ||
1773 | done: | |
1774 | /* device either stalls (value < 0) or reports success */ | |
1775 | return value; | |
1776 | } | |
1777 | ||
2d5a8899 | 1778 | void composite_disconnect(struct usb_gadget *gadget) |
40982be5 DB |
1779 | { |
1780 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1781 | unsigned long flags; | |
1782 | ||
1783 | /* REVISIT: should we have config and device level | |
1784 | * disconnect callbacks? | |
1785 | */ | |
1786 | spin_lock_irqsave(&cdev->lock, flags); | |
1787 | if (cdev->config) | |
1788 | reset_config(cdev); | |
ffe0b335 SAS |
1789 | if (cdev->driver->disconnect) |
1790 | cdev->driver->disconnect(cdev); | |
40982be5 DB |
1791 | spin_unlock_irqrestore(&cdev->lock, flags); |
1792 | } | |
1793 | ||
1794 | /*-------------------------------------------------------------------------*/ | |
1795 | ||
ce26bd23 GKH |
1796 | static ssize_t suspended_show(struct device *dev, struct device_attribute *attr, |
1797 | char *buf) | |
f48cf80f FC |
1798 | { |
1799 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1800 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1801 | ||
1802 | return sprintf(buf, "%d\n", cdev->suspended); | |
1803 | } | |
ce26bd23 | 1804 | static DEVICE_ATTR_RO(suspended); |
f48cf80f | 1805 | |
779d516c | 1806 | static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver) |
40982be5 DB |
1807 | { |
1808 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1809 | ||
1810 | /* composite_disconnect() must already have been called | |
1811 | * by the underlying peripheral controller driver! | |
1812 | * so there's no i/o concurrency that could affect the | |
1813 | * state protected by cdev->lock. | |
1814 | */ | |
1815 | WARN_ON(cdev->config); | |
1816 | ||
1817 | while (!list_empty(&cdev->configs)) { | |
1818 | struct usb_configuration *c; | |
40982be5 DB |
1819 | c = list_first_entry(&cdev->configs, |
1820 | struct usb_configuration, list); | |
51cce6fc | 1821 | remove_config(cdev, c); |
40982be5 | 1822 | } |
779d516c | 1823 | if (cdev->driver->unbind && unbind_driver) |
ffe0b335 | 1824 | cdev->driver->unbind(cdev); |
40982be5 | 1825 | |
a5923340 SAS |
1826 | composite_dev_cleanup(cdev); |
1827 | ||
cc2683c3 | 1828 | kfree(cdev->def_manufacturer); |
40982be5 DB |
1829 | kfree(cdev); |
1830 | set_gadget_data(gadget, NULL); | |
40982be5 DB |
1831 | } |
1832 | ||
779d516c SAS |
1833 | static void composite_unbind(struct usb_gadget *gadget) |
1834 | { | |
1835 | __composite_unbind(gadget, true); | |
1836 | } | |
1837 | ||
7d16e8d3 SAS |
1838 | static void update_unchanged_dev_desc(struct usb_device_descriptor *new, |
1839 | const struct usb_device_descriptor *old) | |
1840 | { | |
1841 | __le16 idVendor; | |
1842 | __le16 idProduct; | |
1843 | __le16 bcdDevice; | |
1cf0d264 | 1844 | u8 iSerialNumber; |
03de9bf6 | 1845 | u8 iManufacturer; |
2d35ee47 | 1846 | u8 iProduct; |
7d16e8d3 SAS |
1847 | |
1848 | /* | |
1849 | * these variables may have been set in | |
1850 | * usb_composite_overwrite_options() | |
1851 | */ | |
1852 | idVendor = new->idVendor; | |
1853 | idProduct = new->idProduct; | |
1854 | bcdDevice = new->bcdDevice; | |
1cf0d264 | 1855 | iSerialNumber = new->iSerialNumber; |
03de9bf6 | 1856 | iManufacturer = new->iManufacturer; |
2d35ee47 | 1857 | iProduct = new->iProduct; |
7d16e8d3 SAS |
1858 | |
1859 | *new = *old; | |
1860 | if (idVendor) | |
1861 | new->idVendor = idVendor; | |
1862 | if (idProduct) | |
1863 | new->idProduct = idProduct; | |
1864 | if (bcdDevice) | |
1865 | new->bcdDevice = bcdDevice; | |
ed9cbda6 SAS |
1866 | else |
1867 | new->bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1cf0d264 SAS |
1868 | if (iSerialNumber) |
1869 | new->iSerialNumber = iSerialNumber; | |
03de9bf6 SAS |
1870 | if (iManufacturer) |
1871 | new->iManufacturer = iManufacturer; | |
2d35ee47 SAS |
1872 | if (iProduct) |
1873 | new->iProduct = iProduct; | |
7d16e8d3 SAS |
1874 | } |
1875 | ||
a5923340 SAS |
1876 | int composite_dev_prepare(struct usb_composite_driver *composite, |
1877 | struct usb_composite_dev *cdev) | |
ffe0b335 | 1878 | { |
a5923340 SAS |
1879 | struct usb_gadget *gadget = cdev->gadget; |
1880 | int ret = -ENOMEM; | |
40982be5 DB |
1881 | |
1882 | /* preallocate control response and buffer */ | |
1883 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
1884 | if (!cdev->req) | |
a5923340 SAS |
1885 | return -ENOMEM; |
1886 | ||
e13f17ff | 1887 | cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); |
40982be5 DB |
1888 | if (!cdev->req->buf) |
1889 | goto fail; | |
a5923340 SAS |
1890 | |
1891 | ret = device_create_file(&gadget->dev, &dev_attr_suspended); | |
1892 | if (ret) | |
1893 | goto fail_dev; | |
1894 | ||
40982be5 DB |
1895 | cdev->req->complete = composite_setup_complete; |
1896 | gadget->ep0->driver_data = cdev; | |
1897 | ||
40982be5 DB |
1898 | cdev->driver = composite; |
1899 | ||
37b5801e PM |
1900 | /* |
1901 | * As per USB compliance update, a device that is actively drawing | |
1902 | * more than 100mA from USB must report itself as bus-powered in | |
1903 | * the GetStatus(DEVICE) call. | |
1904 | */ | |
1905 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
1906 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
1907 | |
1908 | /* interface and string IDs start at zero via kzalloc. | |
1909 | * we force endpoints to start unassigned; few controller | |
1910 | * drivers will zero ep->driver_data. | |
1911 | */ | |
a5923340 SAS |
1912 | usb_ep_autoconfig_reset(gadget); |
1913 | return 0; | |
1914 | fail_dev: | |
1915 | kfree(cdev->req->buf); | |
1916 | fail: | |
1917 | usb_ep_free_request(gadget->ep0, cdev->req); | |
1918 | cdev->req = NULL; | |
1919 | return ret; | |
1920 | } | |
1921 | ||
37a3a533 AP |
1922 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1923 | struct usb_ep *ep0) | |
1924 | { | |
1925 | int ret = 0; | |
1926 | ||
1927 | cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL); | |
1928 | if (!cdev->os_desc_req) { | |
1929 | ret = PTR_ERR(cdev->os_desc_req); | |
1930 | goto end; | |
1931 | } | |
1932 | ||
1933 | /* OS feature descriptor length <= 4kB */ | |
1934 | cdev->os_desc_req->buf = kmalloc(4096, GFP_KERNEL); | |
1935 | if (!cdev->os_desc_req->buf) { | |
1936 | ret = PTR_ERR(cdev->os_desc_req->buf); | |
1937 | kfree(cdev->os_desc_req); | |
1938 | goto end; | |
1939 | } | |
1940 | cdev->os_desc_req->complete = composite_setup_complete; | |
1941 | end: | |
1942 | return ret; | |
1943 | } | |
1944 | ||
a5923340 SAS |
1945 | void composite_dev_cleanup(struct usb_composite_dev *cdev) |
1946 | { | |
27a46633 SAS |
1947 | struct usb_gadget_string_container *uc, *tmp; |
1948 | ||
1949 | list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) { | |
1950 | list_del(&uc->list); | |
1951 | kfree(uc); | |
1952 | } | |
37a3a533 AP |
1953 | if (cdev->os_desc_req) { |
1954 | kfree(cdev->os_desc_req->buf); | |
1955 | usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req); | |
1956 | } | |
a5923340 | 1957 | if (cdev->req) { |
be0a8887 | 1958 | kfree(cdev->req->buf); |
72a65a0d | 1959 | usb_ep_dequeue(cdev->gadget->ep0, cdev->req); |
a5923340 SAS |
1960 | usb_ep_free_request(cdev->gadget->ep0, cdev->req); |
1961 | } | |
88af8bbe | 1962 | cdev->next_string_id = 0; |
a5923340 SAS |
1963 | device_remove_file(&cdev->gadget->dev, &dev_attr_suspended); |
1964 | } | |
1965 | ||
1966 | static int composite_bind(struct usb_gadget *gadget, | |
1967 | struct usb_gadget_driver *gdriver) | |
1968 | { | |
1969 | struct usb_composite_dev *cdev; | |
1970 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1971 | int status = -ENOMEM; | |
1972 | ||
1973 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
1974 | if (!cdev) | |
1975 | return status; | |
1976 | ||
1977 | spin_lock_init(&cdev->lock); | |
1978 | cdev->gadget = gadget; | |
1979 | set_gadget_data(gadget, cdev); | |
1980 | INIT_LIST_HEAD(&cdev->configs); | |
9bb2859f | 1981 | INIT_LIST_HEAD(&cdev->gstrings); |
a5923340 SAS |
1982 | |
1983 | status = composite_dev_prepare(composite, cdev); | |
1984 | if (status) | |
1985 | goto fail; | |
40982be5 DB |
1986 | |
1987 | /* composite gadget needs to assign strings for whole device (like | |
1988 | * serial number), register function drivers, potentially update | |
1989 | * power state and consumption, etc | |
1990 | */ | |
fac3a43e | 1991 | status = composite->bind(cdev); |
40982be5 DB |
1992 | if (status < 0) |
1993 | goto fail; | |
1994 | ||
37a3a533 AP |
1995 | if (cdev->use_os_string) { |
1996 | status = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1997 | if (status) | |
1998 | goto fail; | |
1999 | } | |
2000 | ||
7d16e8d3 | 2001 | update_unchanged_dev_desc(&cdev->desc, composite->dev); |
dbb442b8 | 2002 | |
ad1a8102 MN |
2003 | /* has userspace failed to provide a serial number? */ |
2004 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
2005 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 DB |
2006 | |
2007 | INFO(cdev, "%s ready\n", composite->name); | |
2008 | return 0; | |
2009 | ||
2010 | fail: | |
779d516c | 2011 | __composite_unbind(gadget, false); |
40982be5 DB |
2012 | return status; |
2013 | } | |
2014 | ||
2015 | /*-------------------------------------------------------------------------*/ | |
2016 | ||
2017 | static void | |
2018 | composite_suspend(struct usb_gadget *gadget) | |
2019 | { | |
2020 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2021 | struct usb_function *f; | |
2022 | ||
8942939a | 2023 | /* REVISIT: should we have config level |
40982be5 DB |
2024 | * suspend/resume callbacks? |
2025 | */ | |
2026 | DBG(cdev, "suspend\n"); | |
2027 | if (cdev->config) { | |
2028 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2029 | if (f->suspend) | |
2030 | f->suspend(f); | |
2031 | } | |
2032 | } | |
ffe0b335 SAS |
2033 | if (cdev->driver->suspend) |
2034 | cdev->driver->suspend(cdev); | |
f48cf80f FC |
2035 | |
2036 | cdev->suspended = 1; | |
b23f2f94 HW |
2037 | |
2038 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
2039 | } |
2040 | ||
2041 | static void | |
2042 | composite_resume(struct usb_gadget *gadget) | |
2043 | { | |
2044 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2045 | struct usb_function *f; | |
56b1b909 | 2046 | u16 maxpower; |
40982be5 | 2047 | |
8942939a | 2048 | /* REVISIT: should we have config level |
40982be5 DB |
2049 | * suspend/resume callbacks? |
2050 | */ | |
2051 | DBG(cdev, "resume\n"); | |
ffe0b335 SAS |
2052 | if (cdev->driver->resume) |
2053 | cdev->driver->resume(cdev); | |
40982be5 DB |
2054 | if (cdev->config) { |
2055 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2056 | if (f->resume) | |
2057 | f->resume(f); | |
2058 | } | |
b23f2f94 | 2059 | |
8f900a9a | 2060 | maxpower = cdev->config->MaxPower; |
b23f2f94 HW |
2061 | |
2062 | usb_gadget_vbus_draw(gadget, maxpower ? | |
8f900a9a | 2063 | maxpower : CONFIG_USB_GADGET_VBUS_DRAW); |
40982be5 | 2064 | } |
f48cf80f FC |
2065 | |
2066 | cdev->suspended = 0; | |
40982be5 DB |
2067 | } |
2068 | ||
2069 | /*-------------------------------------------------------------------------*/ | |
2070 | ||
ffe0b335 | 2071 | static const struct usb_gadget_driver composite_driver_template = { |
93952956 | 2072 | .bind = composite_bind, |
915c8bef | 2073 | .unbind = composite_unbind, |
40982be5 DB |
2074 | |
2075 | .setup = composite_setup, | |
d8a816fc | 2076 | .reset = composite_disconnect, |
40982be5 DB |
2077 | .disconnect = composite_disconnect, |
2078 | ||
2079 | .suspend = composite_suspend, | |
2080 | .resume = composite_resume, | |
2081 | ||
2082 | .driver = { | |
2083 | .owner = THIS_MODULE, | |
2084 | }, | |
2085 | }; | |
2086 | ||
2087 | /** | |
07a18bd7 | 2088 | * usb_composite_probe() - register a composite driver |
40982be5 | 2089 | * @driver: the driver to register |
43febb27 | 2090 | * |
40982be5 DB |
2091 | * Context: single threaded during gadget setup |
2092 | * | |
2093 | * This function is used to register drivers using the composite driver | |
2094 | * framework. The return value is zero, or a negative errno value. | |
2095 | * Those values normally come from the driver's @bind method, which does | |
2096 | * all the work of setting up the driver to match the hardware. | |
2097 | * | |
2098 | * On successful return, the gadget is ready to respond to requests from | |
2099 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
2100 | * while it was binding. That would usually be done in order to wait for | |
2101 | * some userspace participation. | |
2102 | */ | |
03e42bd5 | 2103 | int usb_composite_probe(struct usb_composite_driver *driver) |
40982be5 | 2104 | { |
ffe0b335 SAS |
2105 | struct usb_gadget_driver *gadget_driver; |
2106 | ||
2107 | if (!driver || !driver->dev || !driver->bind) | |
40982be5 DB |
2108 | return -EINVAL; |
2109 | ||
2110 | if (!driver->name) | |
2111 | driver->name = "composite"; | |
40982be5 | 2112 | |
ffe0b335 SAS |
2113 | driver->gadget_driver = composite_driver_template; |
2114 | gadget_driver = &driver->gadget_driver; | |
2115 | ||
2116 | gadget_driver->function = (char *) driver->name; | |
2117 | gadget_driver->driver.name = driver->name; | |
2118 | gadget_driver->max_speed = driver->max_speed; | |
2119 | ||
2120 | return usb_gadget_probe_driver(gadget_driver); | |
40982be5 | 2121 | } |
721e2e91 | 2122 | EXPORT_SYMBOL_GPL(usb_composite_probe); |
40982be5 DB |
2123 | |
2124 | /** | |
2125 | * usb_composite_unregister() - unregister a composite driver | |
2126 | * @driver: the driver to unregister | |
2127 | * | |
2128 | * This function is used to unregister drivers using the composite | |
2129 | * driver framework. | |
2130 | */ | |
28824b18 | 2131 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 | 2132 | { |
ffe0b335 | 2133 | usb_gadget_unregister_driver(&driver->gadget_driver); |
40982be5 | 2134 | } |
721e2e91 | 2135 | EXPORT_SYMBOL_GPL(usb_composite_unregister); |
1b9ba000 RQ |
2136 | |
2137 | /** | |
2138 | * usb_composite_setup_continue() - Continue with the control transfer | |
2139 | * @cdev: the composite device who's control transfer was kept waiting | |
2140 | * | |
2141 | * This function must be called by the USB function driver to continue | |
2142 | * with the control transfer's data/status stage in case it had requested to | |
2143 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
2144 | * can request the composite framework to delay the setup request's data/status | |
2145 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
2146 | */ | |
2147 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
2148 | { | |
2149 | int value; | |
2150 | struct usb_request *req = cdev->req; | |
2151 | unsigned long flags; | |
2152 | ||
2153 | DBG(cdev, "%s\n", __func__); | |
2154 | spin_lock_irqsave(&cdev->lock, flags); | |
2155 | ||
2156 | if (cdev->delayed_status == 0) { | |
2157 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
2158 | ||
2159 | } else if (--cdev->delayed_status == 0) { | |
2160 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
2161 | req->length = 0; | |
2162 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
2163 | if (value < 0) { | |
2164 | DBG(cdev, "ep_queue --> %d\n", value); | |
2165 | req->status = 0; | |
2166 | composite_setup_complete(cdev->gadget->ep0, req); | |
2167 | } | |
2168 | } | |
2169 | ||
2170 | spin_unlock_irqrestore(&cdev->lock, flags); | |
2171 | } | |
721e2e91 | 2172 | EXPORT_SYMBOL_GPL(usb_composite_setup_continue); |
1b9ba000 | 2173 | |
cc2683c3 SAS |
2174 | static char *composite_default_mfr(struct usb_gadget *gadget) |
2175 | { | |
2176 | char *mfr; | |
2177 | int len; | |
2178 | ||
2179 | len = snprintf(NULL, 0, "%s %s with %s", init_utsname()->sysname, | |
2180 | init_utsname()->release, gadget->name); | |
2181 | len++; | |
2182 | mfr = kmalloc(len, GFP_KERNEL); | |
2183 | if (!mfr) | |
2184 | return NULL; | |
2185 | snprintf(mfr, len, "%s %s with %s", init_utsname()->sysname, | |
2186 | init_utsname()->release, gadget->name); | |
2187 | return mfr; | |
2188 | } | |
2189 | ||
7d16e8d3 SAS |
2190 | void usb_composite_overwrite_options(struct usb_composite_dev *cdev, |
2191 | struct usb_composite_overwrite *covr) | |
2192 | { | |
2193 | struct usb_device_descriptor *desc = &cdev->desc; | |
1cf0d264 SAS |
2194 | struct usb_gadget_strings *gstr = cdev->driver->strings[0]; |
2195 | struct usb_string *dev_str = gstr->strings; | |
7d16e8d3 SAS |
2196 | |
2197 | if (covr->idVendor) | |
2198 | desc->idVendor = cpu_to_le16(covr->idVendor); | |
2199 | ||
2200 | if (covr->idProduct) | |
2201 | desc->idProduct = cpu_to_le16(covr->idProduct); | |
2202 | ||
2203 | if (covr->bcdDevice) | |
2204 | desc->bcdDevice = cpu_to_le16(covr->bcdDevice); | |
1cf0d264 SAS |
2205 | |
2206 | if (covr->serial_number) { | |
2207 | desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id; | |
2208 | dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number; | |
2209 | } | |
03de9bf6 SAS |
2210 | if (covr->manufacturer) { |
2211 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2212 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer; | |
cc2683c3 SAS |
2213 | |
2214 | } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) { | |
2215 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2216 | cdev->def_manufacturer = composite_default_mfr(cdev->gadget); | |
2217 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer; | |
03de9bf6 | 2218 | } |
2d35ee47 SAS |
2219 | |
2220 | if (covr->product) { | |
2221 | desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id; | |
2222 | dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product; | |
2223 | } | |
7d16e8d3 | 2224 | } |
721e2e91 | 2225 | EXPORT_SYMBOL_GPL(usb_composite_overwrite_options); |
d80c304b SAS |
2226 | |
2227 | MODULE_LICENSE("GPL"); | |
2228 | MODULE_AUTHOR("David Brownell"); |