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Commit | Line | Data |
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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> | |
53e6242d | 22 | #include <linux/usb/otg.h> |
bdb64d72 | 23 | #include <asm/unaligned.h> |
40982be5 | 24 | |
37a3a533 AP |
25 | #include "u_os_desc.h" |
26 | ||
19824d5e AP |
27 | /** |
28 | * struct usb_os_string - represents OS String to be reported by a gadget | |
29 | * @bLength: total length of the entire descritor, always 0x12 | |
30 | * @bDescriptorType: USB_DT_STRING | |
31 | * @qwSignature: the OS String proper | |
32 | * @bMS_VendorCode: code used by the host for subsequent requests | |
33 | * @bPad: not used, must be zero | |
34 | */ | |
35 | struct usb_os_string { | |
36 | __u8 bLength; | |
37 | __u8 bDescriptorType; | |
38 | __u8 qwSignature[OS_STRING_QW_SIGN_LEN]; | |
39 | __u8 bMS_VendorCode; | |
40 | __u8 bPad; | |
41 | } __packed; | |
42 | ||
40982be5 DB |
43 | /* |
44 | * The code in this file is utility code, used to build a gadget driver | |
45 | * from one or more "function" drivers, one or more "configuration" | |
46 | * objects, and a "usb_composite_driver" by gluing them together along | |
47 | * with the relevant device-wide data. | |
48 | */ | |
49 | ||
9bb2859f SAS |
50 | static struct usb_gadget_strings **get_containers_gs( |
51 | struct usb_gadget_string_container *uc) | |
52 | { | |
53 | return (struct usb_gadget_strings **)uc->stash; | |
54 | } | |
55 | ||
48767a4e TB |
56 | /** |
57 | * next_ep_desc() - advance to the next EP descriptor | |
58 | * @t: currect pointer within descriptor array | |
59 | * | |
60 | * Return: next EP descriptor or NULL | |
61 | * | |
62 | * Iterate over @t until either EP descriptor found or | |
63 | * NULL (that indicates end of list) encountered | |
64 | */ | |
65 | static struct usb_descriptor_header** | |
66 | next_ep_desc(struct usb_descriptor_header **t) | |
67 | { | |
68 | for (; *t; t++) { | |
69 | if ((*t)->bDescriptorType == USB_DT_ENDPOINT) | |
70 | return t; | |
71 | } | |
72 | return NULL; | |
73 | } | |
74 | ||
75 | /* | |
76 | * for_each_ep_desc()- iterate over endpoint descriptors in the | |
77 | * descriptors list | |
78 | * @start: pointer within descriptor array. | |
79 | * @ep_desc: endpoint descriptor to use as the loop cursor | |
80 | */ | |
81 | #define for_each_ep_desc(start, ep_desc) \ | |
82 | for (ep_desc = next_ep_desc(start); \ | |
83 | ep_desc; ep_desc = next_ep_desc(ep_desc+1)) | |
84 | ||
85 | /** | |
86 | * config_ep_by_speed() - configures the given endpoint | |
87 | * according to gadget speed. | |
88 | * @g: pointer to the gadget | |
89 | * @f: usb function | |
90 | * @_ep: the endpoint to configure | |
91 | * | |
92 | * Return: error code, 0 on success | |
93 | * | |
94 | * This function chooses the right descriptors for a given | |
95 | * endpoint according to gadget speed and saves it in the | |
96 | * endpoint desc field. If the endpoint already has a descriptor | |
97 | * assigned to it - overwrites it with currently corresponding | |
98 | * descriptor. The endpoint maxpacket field is updated according | |
99 | * to the chosen descriptor. | |
100 | * Note: the supplied function should hold all the descriptors | |
101 | * for supported speeds | |
102 | */ | |
103 | int config_ep_by_speed(struct usb_gadget *g, | |
104 | struct usb_function *f, | |
105 | struct usb_ep *_ep) | |
106 | { | |
b785ea7c | 107 | struct usb_composite_dev *cdev = get_gadget_data(g); |
48767a4e TB |
108 | struct usb_endpoint_descriptor *chosen_desc = NULL; |
109 | struct usb_descriptor_header **speed_desc = NULL; | |
110 | ||
bdb64d72 TB |
111 | struct usb_ss_ep_comp_descriptor *comp_desc = NULL; |
112 | int want_comp_desc = 0; | |
113 | ||
48767a4e TB |
114 | struct usb_descriptor_header **d_spd; /* cursor for speed desc */ |
115 | ||
116 | if (!g || !f || !_ep) | |
117 | return -EIO; | |
118 | ||
119 | /* select desired speed */ | |
120 | switch (g->speed) { | |
bdb64d72 TB |
121 | case USB_SPEED_SUPER: |
122 | if (gadget_is_superspeed(g)) { | |
123 | speed_desc = f->ss_descriptors; | |
124 | want_comp_desc = 1; | |
125 | break; | |
126 | } | |
127 | /* else: Fall trough */ | |
48767a4e TB |
128 | case USB_SPEED_HIGH: |
129 | if (gadget_is_dualspeed(g)) { | |
130 | speed_desc = f->hs_descriptors; | |
131 | break; | |
132 | } | |
133 | /* else: fall through */ | |
134 | default: | |
10287bae | 135 | speed_desc = f->fs_descriptors; |
48767a4e TB |
136 | } |
137 | /* find descriptors */ | |
138 | for_each_ep_desc(speed_desc, d_spd) { | |
139 | chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; | |
140 | if (chosen_desc->bEndpointAddress == _ep->address) | |
141 | goto ep_found; | |
142 | } | |
143 | return -EIO; | |
144 | ||
145 | ep_found: | |
146 | /* commit results */ | |
29cc8897 | 147 | _ep->maxpacket = usb_endpoint_maxp(chosen_desc); |
48767a4e | 148 | _ep->desc = chosen_desc; |
bdb64d72 TB |
149 | _ep->comp_desc = NULL; |
150 | _ep->maxburst = 0; | |
151 | _ep->mult = 0; | |
152 | if (!want_comp_desc) | |
153 | return 0; | |
48767a4e | 154 | |
bdb64d72 TB |
155 | /* |
156 | * Companion descriptor should follow EP descriptor | |
157 | * USB 3.0 spec, #9.6.7 | |
158 | */ | |
159 | comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); | |
160 | if (!comp_desc || | |
161 | (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) | |
162 | return -EIO; | |
163 | _ep->comp_desc = comp_desc; | |
164 | if (g->speed == USB_SPEED_SUPER) { | |
165 | switch (usb_endpoint_type(_ep->desc)) { | |
bdb64d72 TB |
166 | case USB_ENDPOINT_XFER_ISOC: |
167 | /* mult: bits 1:0 of bmAttributes */ | |
168 | _ep->mult = comp_desc->bmAttributes & 0x3; | |
9e878a6b PZ |
169 | case USB_ENDPOINT_XFER_BULK: |
170 | case USB_ENDPOINT_XFER_INT: | |
b785ea7c | 171 | _ep->maxburst = comp_desc->bMaxBurst + 1; |
bdb64d72 TB |
172 | break; |
173 | default: | |
b785ea7c FB |
174 | if (comp_desc->bMaxBurst != 0) |
175 | ERROR(cdev, "ep0 bMaxBurst must be 0\n"); | |
176 | _ep->maxburst = 1; | |
bdb64d72 TB |
177 | break; |
178 | } | |
179 | } | |
48767a4e TB |
180 | return 0; |
181 | } | |
721e2e91 | 182 | EXPORT_SYMBOL_GPL(config_ep_by_speed); |
40982be5 DB |
183 | |
184 | /** | |
185 | * usb_add_function() - add a function to a configuration | |
186 | * @config: the configuration | |
187 | * @function: the function being added | |
188 | * Context: single threaded during gadget setup | |
189 | * | |
190 | * After initialization, each configuration must have one or more | |
191 | * functions added to it. Adding a function involves calling its @bind() | |
192 | * method to allocate resources such as interface and string identifiers | |
193 | * and endpoints. | |
194 | * | |
195 | * This function returns the value of the function's bind(), which is | |
196 | * zero for success else a negative errno value. | |
197 | */ | |
28824b18 | 198 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
199 | struct usb_function *function) |
200 | { | |
201 | int value = -EINVAL; | |
202 | ||
203 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
204 | function->name, function, | |
205 | config->label, config); | |
206 | ||
207 | if (!function->set_alt || !function->disable) | |
208 | goto done; | |
209 | ||
210 | function->config = config; | |
211 | list_add_tail(&function->list, &config->functions); | |
212 | ||
d5bb9b81 RB |
213 | if (function->bind_deactivated) { |
214 | value = usb_function_deactivate(function); | |
215 | if (value) | |
216 | goto done; | |
217 | } | |
218 | ||
40982be5 DB |
219 | /* REVISIT *require* function->bind? */ |
220 | if (function->bind) { | |
221 | value = function->bind(config, function); | |
222 | if (value < 0) { | |
223 | list_del(&function->list); | |
224 | function->config = NULL; | |
225 | } | |
226 | } else | |
227 | value = 0; | |
228 | ||
229 | /* We allow configurations that don't work at both speeds. | |
230 | * If we run into a lowspeed Linux system, treat it the same | |
231 | * as full speed ... it's the function drivers that will need | |
232 | * to avoid bulk and ISO transfers. | |
233 | */ | |
10287bae | 234 | if (!config->fullspeed && function->fs_descriptors) |
40982be5 DB |
235 | config->fullspeed = true; |
236 | if (!config->highspeed && function->hs_descriptors) | |
237 | config->highspeed = true; | |
bdb64d72 TB |
238 | if (!config->superspeed && function->ss_descriptors) |
239 | config->superspeed = true; | |
554eead5 JY |
240 | if (!config->superspeed_plus && function->ssp_descriptors) |
241 | config->superspeed_plus = true; | |
40982be5 DB |
242 | |
243 | done: | |
244 | if (value) | |
245 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
246 | function->name, function, value); | |
247 | return value; | |
248 | } | |
721e2e91 | 249 | EXPORT_SYMBOL_GPL(usb_add_function); |
40982be5 | 250 | |
b4735778 SAS |
251 | void usb_remove_function(struct usb_configuration *c, struct usb_function *f) |
252 | { | |
253 | if (f->disable) | |
254 | f->disable(f); | |
255 | ||
256 | bitmap_zero(f->endpoints, 32); | |
257 | list_del(&f->list); | |
258 | if (f->unbind) | |
259 | f->unbind(c, f); | |
260 | } | |
261 | EXPORT_SYMBOL_GPL(usb_remove_function); | |
262 | ||
60beed95 DB |
263 | /** |
264 | * usb_function_deactivate - prevent function and gadget enumeration | |
265 | * @function: the function that isn't yet ready to respond | |
266 | * | |
267 | * Blocks response of the gadget driver to host enumeration by | |
268 | * preventing the data line pullup from being activated. This is | |
269 | * normally called during @bind() processing to change from the | |
270 | * initial "ready to respond" state, or when a required resource | |
271 | * becomes available. | |
272 | * | |
273 | * For example, drivers that serve as a passthrough to a userspace | |
274 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
275 | * MTP, or print server) is ready to handle host requests. | |
276 | * | |
277 | * Not all systems support software control of their USB peripheral | |
278 | * data pullups. | |
279 | * | |
280 | * Returns zero on success, else negative errno. | |
281 | */ | |
282 | int usb_function_deactivate(struct usb_function *function) | |
283 | { | |
284 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 285 | unsigned long flags; |
60beed95 DB |
286 | int status = 0; |
287 | ||
b2bdf3a7 | 288 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
289 | |
290 | if (cdev->deactivations == 0) | |
5601250b | 291 | status = usb_gadget_deactivate(cdev->gadget); |
60beed95 DB |
292 | if (status == 0) |
293 | cdev->deactivations++; | |
294 | ||
b2bdf3a7 | 295 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
296 | return status; |
297 | } | |
721e2e91 | 298 | EXPORT_SYMBOL_GPL(usb_function_deactivate); |
60beed95 DB |
299 | |
300 | /** | |
301 | * usb_function_activate - allow function and gadget enumeration | |
302 | * @function: function on which usb_function_activate() was called | |
303 | * | |
304 | * Reverses effect of usb_function_deactivate(). If no more functions | |
305 | * are delaying their activation, the gadget driver will respond to | |
306 | * host enumeration procedures. | |
307 | * | |
308 | * Returns zero on success, else negative errno. | |
309 | */ | |
310 | int usb_function_activate(struct usb_function *function) | |
311 | { | |
312 | struct usb_composite_dev *cdev = function->config->cdev; | |
4fefe9f6 | 313 | unsigned long flags; |
60beed95 DB |
314 | int status = 0; |
315 | ||
4fefe9f6 | 316 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
317 | |
318 | if (WARN_ON(cdev->deactivations == 0)) | |
319 | status = -EINVAL; | |
320 | else { | |
321 | cdev->deactivations--; | |
322 | if (cdev->deactivations == 0) | |
5601250b | 323 | status = usb_gadget_activate(cdev->gadget); |
60beed95 DB |
324 | } |
325 | ||
4fefe9f6 | 326 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
327 | return status; |
328 | } | |
721e2e91 | 329 | EXPORT_SYMBOL_GPL(usb_function_activate); |
60beed95 | 330 | |
40982be5 DB |
331 | /** |
332 | * usb_interface_id() - allocate an unused interface ID | |
333 | * @config: configuration associated with the interface | |
334 | * @function: function handling the interface | |
335 | * Context: single threaded during gadget setup | |
336 | * | |
337 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
338 | * allocate new interface IDs. The function driver will then store that | |
339 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 340 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
341 | * particularly changing its altsetting via set_alt(). There may |
342 | * also be class-specific or vendor-specific requests to handle. | |
343 | * | |
344 | * All interface identifier should be allocated using this routine, to | |
345 | * ensure that for example different functions don't wrongly assign | |
346 | * different meanings to the same identifier. Note that since interface | |
25985edc | 347 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
348 | * one configuration (or more than once in a given configuration) need |
349 | * multiple versions of the relevant descriptors. | |
350 | * | |
351 | * Returns the interface ID which was allocated; or -ENODEV if no | |
352 | * more interface IDs can be allocated. | |
353 | */ | |
28824b18 | 354 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
355 | struct usb_function *function) |
356 | { | |
357 | unsigned id = config->next_interface_id; | |
358 | ||
359 | if (id < MAX_CONFIG_INTERFACES) { | |
360 | config->interface[id] = function; | |
361 | config->next_interface_id = id + 1; | |
362 | return id; | |
363 | } | |
364 | return -ENODEV; | |
365 | } | |
721e2e91 | 366 | EXPORT_SYMBOL_GPL(usb_interface_id); |
40982be5 | 367 | |
8f900a9a SAS |
368 | static u8 encode_bMaxPower(enum usb_device_speed speed, |
369 | struct usb_configuration *c) | |
370 | { | |
371 | unsigned val; | |
372 | ||
373 | if (c->MaxPower) | |
374 | val = c->MaxPower; | |
375 | else | |
376 | val = CONFIG_USB_GADGET_VBUS_DRAW; | |
377 | if (!val) | |
378 | return 0; | |
379 | switch (speed) { | |
380 | case USB_SPEED_SUPER: | |
381 | return DIV_ROUND_UP(val, 8); | |
382 | default: | |
383 | return DIV_ROUND_UP(val, 2); | |
2b84f92b | 384 | } |
8f900a9a SAS |
385 | } |
386 | ||
40982be5 DB |
387 | static int config_buf(struct usb_configuration *config, |
388 | enum usb_device_speed speed, void *buf, u8 type) | |
389 | { | |
390 | struct usb_config_descriptor *c = buf; | |
391 | void *next = buf + USB_DT_CONFIG_SIZE; | |
e13f17ff | 392 | int len; |
40982be5 DB |
393 | struct usb_function *f; |
394 | int status; | |
395 | ||
e13f17ff | 396 | len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE; |
40982be5 DB |
397 | /* write the config descriptor */ |
398 | c = buf; | |
399 | c->bLength = USB_DT_CONFIG_SIZE; | |
400 | c->bDescriptorType = type; | |
401 | /* wTotalLength is written later */ | |
402 | c->bNumInterfaces = config->next_interface_id; | |
403 | c->bConfigurationValue = config->bConfigurationValue; | |
404 | c->iConfiguration = config->iConfiguration; | |
405 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
8f900a9a | 406 | c->bMaxPower = encode_bMaxPower(speed, config); |
40982be5 DB |
407 | |
408 | /* There may be e.g. OTG descriptors */ | |
409 | if (config->descriptors) { | |
410 | status = usb_descriptor_fillbuf(next, len, | |
411 | config->descriptors); | |
412 | if (status < 0) | |
413 | return status; | |
414 | len -= status; | |
415 | next += status; | |
416 | } | |
417 | ||
418 | /* add each function's descriptors */ | |
419 | list_for_each_entry(f, &config->functions, list) { | |
420 | struct usb_descriptor_header **descriptors; | |
421 | ||
bdb64d72 TB |
422 | switch (speed) { |
423 | case USB_SPEED_SUPER: | |
424 | descriptors = f->ss_descriptors; | |
425 | break; | |
426 | case USB_SPEED_HIGH: | |
40982be5 | 427 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
428 | break; |
429 | default: | |
10287bae | 430 | descriptors = f->fs_descriptors; |
bdb64d72 TB |
431 | } |
432 | ||
40982be5 DB |
433 | if (!descriptors) |
434 | continue; | |
435 | status = usb_descriptor_fillbuf(next, len, | |
436 | (const struct usb_descriptor_header **) descriptors); | |
437 | if (status < 0) | |
438 | return status; | |
439 | len -= status; | |
440 | next += status; | |
441 | } | |
442 | ||
443 | len = next - buf; | |
444 | c->wTotalLength = cpu_to_le16(len); | |
445 | return len; | |
446 | } | |
447 | ||
448 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
449 | { | |
450 | struct usb_gadget *gadget = cdev->gadget; | |
451 | struct usb_configuration *c; | |
37a3a533 | 452 | struct list_head *pos; |
40982be5 DB |
453 | u8 type = w_value >> 8; |
454 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
455 | ||
bdb64d72 TB |
456 | if (gadget->speed == USB_SPEED_SUPER) |
457 | speed = gadget->speed; | |
458 | else if (gadget_is_dualspeed(gadget)) { | |
459 | int hs = 0; | |
40982be5 DB |
460 | if (gadget->speed == USB_SPEED_HIGH) |
461 | hs = 1; | |
462 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
463 | hs = !hs; | |
464 | if (hs) | |
465 | speed = USB_SPEED_HIGH; | |
466 | ||
467 | } | |
468 | ||
469 | /* This is a lookup by config *INDEX* */ | |
470 | w_value &= 0xff; | |
37a3a533 AP |
471 | |
472 | pos = &cdev->configs; | |
473 | c = cdev->os_desc_config; | |
474 | if (c) | |
475 | goto check_config; | |
476 | ||
477 | while ((pos = pos->next) != &cdev->configs) { | |
478 | c = list_entry(pos, typeof(*c), list); | |
479 | ||
480 | /* skip OS Descriptors config which is handled separately */ | |
481 | if (c == cdev->os_desc_config) | |
482 | continue; | |
483 | ||
484 | check_config: | |
40982be5 | 485 | /* ignore configs that won't work at this speed */ |
bdb64d72 TB |
486 | switch (speed) { |
487 | case USB_SPEED_SUPER: | |
488 | if (!c->superspeed) | |
489 | continue; | |
490 | break; | |
491 | case USB_SPEED_HIGH: | |
40982be5 DB |
492 | if (!c->highspeed) |
493 | continue; | |
bdb64d72 TB |
494 | break; |
495 | default: | |
40982be5 DB |
496 | if (!c->fullspeed) |
497 | continue; | |
498 | } | |
bdb64d72 | 499 | |
40982be5 DB |
500 | if (w_value == 0) |
501 | return config_buf(c, speed, cdev->req->buf, type); | |
502 | w_value--; | |
503 | } | |
504 | return -EINVAL; | |
505 | } | |
506 | ||
507 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
508 | { | |
509 | struct usb_gadget *gadget = cdev->gadget; | |
510 | struct usb_configuration *c; | |
511 | unsigned count = 0; | |
512 | int hs = 0; | |
bdb64d72 | 513 | int ss = 0; |
40982be5 DB |
514 | |
515 | if (gadget_is_dualspeed(gadget)) { | |
516 | if (gadget->speed == USB_SPEED_HIGH) | |
517 | hs = 1; | |
bdb64d72 TB |
518 | if (gadget->speed == USB_SPEED_SUPER) |
519 | ss = 1; | |
40982be5 DB |
520 | if (type == USB_DT_DEVICE_QUALIFIER) |
521 | hs = !hs; | |
522 | } | |
523 | list_for_each_entry(c, &cdev->configs, list) { | |
524 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
525 | if (ss) { |
526 | if (!c->superspeed) | |
527 | continue; | |
528 | } else if (hs) { | |
40982be5 DB |
529 | if (!c->highspeed) |
530 | continue; | |
531 | } else { | |
532 | if (!c->fullspeed) | |
533 | continue; | |
534 | } | |
535 | count++; | |
536 | } | |
537 | return count; | |
538 | } | |
539 | ||
bdb64d72 TB |
540 | /** |
541 | * bos_desc() - prepares the BOS descriptor. | |
542 | * @cdev: pointer to usb_composite device to generate the bos | |
543 | * descriptor for | |
544 | * | |
545 | * This function generates the BOS (Binary Device Object) | |
546 | * descriptor and its device capabilities descriptors. The BOS | |
547 | * descriptor should be supported by a SuperSpeed device. | |
548 | */ | |
549 | static int bos_desc(struct usb_composite_dev *cdev) | |
550 | { | |
551 | struct usb_ext_cap_descriptor *usb_ext; | |
552 | struct usb_ss_cap_descriptor *ss_cap; | |
553 | struct usb_dcd_config_params dcd_config_params; | |
554 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
555 | ||
556 | bos->bLength = USB_DT_BOS_SIZE; | |
557 | bos->bDescriptorType = USB_DT_BOS; | |
558 | ||
559 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
560 | bos->bNumDeviceCaps = 0; | |
561 | ||
562 | /* | |
563 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
564 | * and shall support LPM when operating in USB2.0 HS mode. | |
565 | */ | |
566 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
567 | bos->bNumDeviceCaps++; | |
568 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
569 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
570 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
571 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
a6615937 | 572 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT); |
bdb64d72 TB |
573 | |
574 | /* | |
575 | * The Superspeed USB Capability descriptor shall be implemented by all | |
576 | * SuperSpeed devices. | |
577 | */ | |
578 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
579 | bos->bNumDeviceCaps++; | |
580 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
581 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
582 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
583 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
584 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
585 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
586 | USB_FULL_SPEED_OPERATION | | |
587 | USB_HIGH_SPEED_OPERATION | | |
588 | USB_5GBPS_OPERATION); | |
589 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
590 | ||
591 | /* Get Controller configuration */ | |
592 | if (cdev->gadget->ops->get_config_params) | |
593 | cdev->gadget->ops->get_config_params(&dcd_config_params); | |
594 | else { | |
089b837a | 595 | dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; |
bdb64d72 | 596 | dcd_config_params.bU2DevExitLat = |
089b837a | 597 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); |
bdb64d72 TB |
598 | } |
599 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
600 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
601 | ||
f228a8de JY |
602 | /* The SuperSpeedPlus USB Device Capability descriptor */ |
603 | if (gadget_is_superspeed_plus(cdev->gadget)) { | |
604 | struct usb_ssp_cap_descriptor *ssp_cap; | |
605 | ||
606 | ssp_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
607 | bos->bNumDeviceCaps++; | |
608 | ||
609 | /* | |
610 | * Report typical values. | |
611 | */ | |
612 | ||
613 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SSP_CAP_SIZE(1)); | |
614 | ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(1); | |
615 | ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
616 | ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE; | |
617 | ||
618 | /* SSAC = 1 (2 attributes) */ | |
619 | ssp_cap->bmAttributes = cpu_to_le32(1); | |
620 | ||
621 | /* Min RX/TX Lane Count = 1 */ | |
622 | ssp_cap->wFunctionalitySupport = (1 << 8) | (1 << 12); | |
623 | ||
624 | /* | |
625 | * bmSublinkSpeedAttr[0]: | |
626 | * ST = Symmetric, RX | |
627 | * LSE = 3 (Gbps) | |
628 | * LP = 1 (SuperSpeedPlus) | |
629 | * LSM = 10 (10 Gbps) | |
630 | */ | |
631 | ssp_cap->bmSublinkSpeedAttr[0] = | |
632 | (3 << 4) | (1 << 14) | (0xa << 16); | |
633 | /* | |
634 | * bmSublinkSpeedAttr[1] = | |
635 | * ST = Symmetric, TX | |
636 | * LSE = 3 (Gbps) | |
637 | * LP = 1 (SuperSpeedPlus) | |
638 | * LSM = 10 (10 Gbps) | |
639 | */ | |
640 | ssp_cap->bmSublinkSpeedAttr[1] = | |
641 | (3 << 4) | (1 << 14) | (0xa << 16) | (1 << 7); | |
642 | } | |
643 | ||
bdb64d72 TB |
644 | return le16_to_cpu(bos->wTotalLength); |
645 | } | |
646 | ||
40982be5 DB |
647 | static void device_qual(struct usb_composite_dev *cdev) |
648 | { | |
649 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
650 | ||
651 | qual->bLength = sizeof(*qual); | |
652 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
653 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
654 | qual->bcdUSB = cdev->desc.bcdUSB; | |
655 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
656 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
657 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
658 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 659 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 660 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 661 | qual->bRESERVED = 0; |
40982be5 DB |
662 | } |
663 | ||
664 | /*-------------------------------------------------------------------------*/ | |
665 | ||
666 | static void reset_config(struct usb_composite_dev *cdev) | |
667 | { | |
668 | struct usb_function *f; | |
669 | ||
670 | DBG(cdev, "reset config\n"); | |
671 | ||
672 | list_for_each_entry(f, &cdev->config->functions, list) { | |
673 | if (f->disable) | |
674 | f->disable(f); | |
5242658d LP |
675 | |
676 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
677 | } |
678 | cdev->config = NULL; | |
2bac51a1 | 679 | cdev->delayed_status = 0; |
40982be5 DB |
680 | } |
681 | ||
682 | static int set_config(struct usb_composite_dev *cdev, | |
683 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
684 | { | |
685 | struct usb_gadget *gadget = cdev->gadget; | |
686 | struct usb_configuration *c = NULL; | |
687 | int result = -EINVAL; | |
688 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
689 | int tmp; | |
690 | ||
40982be5 DB |
691 | if (number) { |
692 | list_for_each_entry(c, &cdev->configs, list) { | |
693 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
694 | /* |
695 | * We disable the FDs of the previous | |
696 | * configuration only if the new configuration | |
697 | * is a valid one | |
698 | */ | |
699 | if (cdev->config) | |
700 | reset_config(cdev); | |
40982be5 DB |
701 | result = 0; |
702 | break; | |
703 | } | |
704 | } | |
705 | if (result < 0) | |
706 | goto done; | |
bdb64d72 TB |
707 | } else { /* Zero configuration value - need to reset the config */ |
708 | if (cdev->config) | |
709 | reset_config(cdev); | |
40982be5 | 710 | result = 0; |
bdb64d72 | 711 | } |
40982be5 | 712 | |
e538dfda MN |
713 | INFO(cdev, "%s config #%d: %s\n", |
714 | usb_speed_string(gadget->speed), | |
715 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
716 | |
717 | if (!c) | |
718 | goto done; | |
719 | ||
6027f317 | 720 | usb_gadget_set_state(gadget, USB_STATE_CONFIGURED); |
40982be5 DB |
721 | cdev->config = c; |
722 | ||
723 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
724 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
725 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 726 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
727 | |
728 | if (!f) | |
729 | break; | |
730 | ||
5242658d LP |
731 | /* |
732 | * Record which endpoints are used by the function. This is used | |
733 | * to dispatch control requests targeted at that endpoint to the | |
734 | * function's setup callback instead of the current | |
735 | * configuration's setup callback. | |
736 | */ | |
bdb64d72 TB |
737 | switch (gadget->speed) { |
738 | case USB_SPEED_SUPER: | |
739 | descriptors = f->ss_descriptors; | |
740 | break; | |
741 | case USB_SPEED_HIGH: | |
5242658d | 742 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
743 | break; |
744 | default: | |
10287bae | 745 | descriptors = f->fs_descriptors; |
bdb64d72 | 746 | } |
5242658d LP |
747 | |
748 | for (; *descriptors; ++descriptors) { | |
749 | struct usb_endpoint_descriptor *ep; | |
750 | int addr; | |
751 | ||
752 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
753 | continue; | |
754 | ||
755 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
756 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
757 | | (ep->bEndpointAddress & 0x0f); | |
758 | set_bit(addr, f->endpoints); | |
759 | } | |
760 | ||
40982be5 DB |
761 | result = f->set_alt(f, tmp, 0); |
762 | if (result < 0) { | |
763 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
764 | tmp, f->name, f, result); | |
765 | ||
766 | reset_config(cdev); | |
767 | goto done; | |
768 | } | |
1b9ba000 RQ |
769 | |
770 | if (result == USB_GADGET_DELAYED_STATUS) { | |
771 | DBG(cdev, | |
772 | "%s: interface %d (%s) requested delayed status\n", | |
773 | __func__, tmp, f->name); | |
774 | cdev->delayed_status++; | |
775 | DBG(cdev, "delayed_status count %d\n", | |
776 | cdev->delayed_status); | |
777 | } | |
40982be5 DB |
778 | } |
779 | ||
780 | /* when we return, be sure our power usage is valid */ | |
8f900a9a | 781 | power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
782 | done: |
783 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
784 | if (result >= 0 && cdev->delayed_status) |
785 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
786 | return result; |
787 | } | |
788 | ||
de53c254 SAS |
789 | int usb_add_config_only(struct usb_composite_dev *cdev, |
790 | struct usb_configuration *config) | |
791 | { | |
792 | struct usb_configuration *c; | |
793 | ||
794 | if (!config->bConfigurationValue) | |
795 | return -EINVAL; | |
796 | ||
797 | /* Prevent duplicate configuration identifiers */ | |
798 | list_for_each_entry(c, &cdev->configs, list) { | |
799 | if (c->bConfigurationValue == config->bConfigurationValue) | |
800 | return -EBUSY; | |
801 | } | |
802 | ||
803 | config->cdev = cdev; | |
804 | list_add_tail(&config->list, &cdev->configs); | |
805 | ||
806 | INIT_LIST_HEAD(&config->functions); | |
807 | config->next_interface_id = 0; | |
808 | memset(config->interface, 0, sizeof(config->interface)); | |
809 | ||
810 | return 0; | |
811 | } | |
812 | EXPORT_SYMBOL_GPL(usb_add_config_only); | |
813 | ||
40982be5 DB |
814 | /** |
815 | * usb_add_config() - add a configuration to a device. | |
816 | * @cdev: wraps the USB gadget | |
817 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 818 | * @bind: the configuration's bind function |
40982be5 DB |
819 | * Context: single threaded during gadget setup |
820 | * | |
c9bfff9c | 821 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
822 | * add each of the configurations it supports, using this routine. |
823 | * | |
c9bfff9c | 824 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
825 | * is zero for success else a negative errno value. Binding configurations |
826 | * assigns global resources including string IDs, and per-configuration | |
827 | * resources such as interface IDs and endpoints. | |
828 | */ | |
28824b18 | 829 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
830 | struct usb_configuration *config, |
831 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
832 | { |
833 | int status = -EINVAL; | |
de53c254 SAS |
834 | |
835 | if (!bind) | |
836 | goto done; | |
40982be5 DB |
837 | |
838 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
839 | config->bConfigurationValue, | |
840 | config->label, config); | |
841 | ||
de53c254 SAS |
842 | status = usb_add_config_only(cdev, config); |
843 | if (status) | |
40982be5 DB |
844 | goto done; |
845 | ||
c9bfff9c | 846 | status = bind(config); |
40982be5 | 847 | if (status < 0) { |
124ef389 YO |
848 | while (!list_empty(&config->functions)) { |
849 | struct usb_function *f; | |
850 | ||
851 | f = list_first_entry(&config->functions, | |
852 | struct usb_function, list); | |
853 | list_del(&f->list); | |
854 | if (f->unbind) { | |
855 | DBG(cdev, "unbind function '%s'/%p\n", | |
856 | f->name, f); | |
857 | f->unbind(config, f); | |
858 | /* may free memory for "f" */ | |
859 | } | |
860 | } | |
40982be5 DB |
861 | list_del(&config->list); |
862 | config->cdev = NULL; | |
863 | } else { | |
864 | unsigned i; | |
865 | ||
bdb64d72 | 866 | DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", |
40982be5 | 867 | config->bConfigurationValue, config, |
bdb64d72 | 868 | config->superspeed ? " super" : "", |
40982be5 DB |
869 | config->highspeed ? " high" : "", |
870 | config->fullspeed | |
871 | ? (gadget_is_dualspeed(cdev->gadget) | |
872 | ? " full" | |
873 | : " full/low") | |
874 | : ""); | |
875 | ||
876 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
877 | struct usb_function *f = config->interface[i]; | |
878 | ||
879 | if (!f) | |
880 | continue; | |
881 | DBG(cdev, " interface %d = %s/%p\n", | |
882 | i, f->name, f); | |
883 | } | |
884 | } | |
885 | ||
f871cb9b | 886 | /* set_alt(), or next bind(), sets up ep->claimed as needed */ |
40982be5 DB |
887 | usb_ep_autoconfig_reset(cdev->gadget); |
888 | ||
889 | done: | |
890 | if (status) | |
891 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
892 | config->bConfigurationValue, status); | |
893 | return status; | |
894 | } | |
721e2e91 | 895 | EXPORT_SYMBOL_GPL(usb_add_config); |
40982be5 | 896 | |
51cce6fc BG |
897 | static void remove_config(struct usb_composite_dev *cdev, |
898 | struct usb_configuration *config) | |
899 | { | |
900 | while (!list_empty(&config->functions)) { | |
901 | struct usb_function *f; | |
902 | ||
903 | f = list_first_entry(&config->functions, | |
904 | struct usb_function, list); | |
905 | list_del(&f->list); | |
906 | if (f->unbind) { | |
907 | DBG(cdev, "unbind function '%s'/%p\n", f->name, f); | |
908 | f->unbind(config, f); | |
909 | /* may free memory for "f" */ | |
910 | } | |
911 | } | |
912 | list_del(&config->list); | |
913 | if (config->unbind) { | |
914 | DBG(cdev, "unbind config '%s'/%p\n", config->label, config); | |
915 | config->unbind(config); | |
916 | /* may free memory for "c" */ | |
917 | } | |
918 | } | |
919 | ||
920 | /** | |
921 | * usb_remove_config() - remove a configuration from a device. | |
922 | * @cdev: wraps the USB gadget | |
923 | * @config: the configuration | |
924 | * | |
925 | * Drivers must call usb_gadget_disconnect before calling this function | |
926 | * to disconnect the device from the host and make sure the host will not | |
927 | * try to enumerate the device while we are changing the config list. | |
928 | */ | |
929 | void usb_remove_config(struct usb_composite_dev *cdev, | |
930 | struct usb_configuration *config) | |
931 | { | |
932 | unsigned long flags; | |
933 | ||
934 | spin_lock_irqsave(&cdev->lock, flags); | |
935 | ||
936 | if (cdev->config == config) | |
937 | reset_config(cdev); | |
938 | ||
939 | spin_unlock_irqrestore(&cdev->lock, flags); | |
940 | ||
941 | remove_config(cdev, config); | |
942 | } | |
943 | ||
40982be5 DB |
944 | /*-------------------------------------------------------------------------*/ |
945 | ||
946 | /* We support strings in multiple languages ... string descriptor zero | |
947 | * says which languages are supported. The typical case will be that | |
ad4676ab | 948 | * only one language (probably English) is used, with i18n handled on |
40982be5 DB |
949 | * the host side. |
950 | */ | |
951 | ||
952 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
953 | { | |
954 | const struct usb_gadget_strings *s; | |
20c5e74c | 955 | __le16 language; |
40982be5 DB |
956 | __le16 *tmp; |
957 | ||
958 | while (*sp) { | |
959 | s = *sp; | |
960 | language = cpu_to_le16(s->language); | |
961 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
962 | if (*tmp == language) | |
963 | goto repeat; | |
964 | } | |
965 | *tmp++ = language; | |
966 | repeat: | |
967 | sp++; | |
968 | } | |
969 | } | |
970 | ||
971 | static int lookup_string( | |
972 | struct usb_gadget_strings **sp, | |
973 | void *buf, | |
974 | u16 language, | |
975 | int id | |
976 | ) | |
977 | { | |
978 | struct usb_gadget_strings *s; | |
979 | int value; | |
980 | ||
981 | while (*sp) { | |
982 | s = *sp++; | |
983 | if (s->language != language) | |
984 | continue; | |
985 | value = usb_gadget_get_string(s, id, buf); | |
986 | if (value > 0) | |
987 | return value; | |
988 | } | |
989 | return -EINVAL; | |
990 | } | |
991 | ||
992 | static int get_string(struct usb_composite_dev *cdev, | |
993 | void *buf, u16 language, int id) | |
994 | { | |
ffe0b335 | 995 | struct usb_composite_driver *composite = cdev->driver; |
9bb2859f | 996 | struct usb_gadget_string_container *uc; |
40982be5 DB |
997 | struct usb_configuration *c; |
998 | struct usb_function *f; | |
999 | int len; | |
1000 | ||
ad4676ab | 1001 | /* Yes, not only is USB's i18n support probably more than most |
40982be5 DB |
1002 | * folk will ever care about ... also, it's all supported here. |
1003 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
1004 | */ | |
1005 | ||
1006 | /* 0 == report all available language codes */ | |
1007 | if (id == 0) { | |
1008 | struct usb_string_descriptor *s = buf; | |
1009 | struct usb_gadget_strings **sp; | |
1010 | ||
1011 | memset(s, 0, 256); | |
1012 | s->bDescriptorType = USB_DT_STRING; | |
1013 | ||
1014 | sp = composite->strings; | |
1015 | if (sp) | |
1016 | collect_langs(sp, s->wData); | |
1017 | ||
1018 | list_for_each_entry(c, &cdev->configs, list) { | |
1019 | sp = c->strings; | |
1020 | if (sp) | |
1021 | collect_langs(sp, s->wData); | |
1022 | ||
1023 | list_for_each_entry(f, &c->functions, list) { | |
1024 | sp = f->strings; | |
1025 | if (sp) | |
1026 | collect_langs(sp, s->wData); | |
1027 | } | |
1028 | } | |
27a46633 SAS |
1029 | list_for_each_entry(uc, &cdev->gstrings, list) { |
1030 | struct usb_gadget_strings **sp; | |
1031 | ||
1032 | sp = get_containers_gs(uc); | |
1033 | collect_langs(sp, s->wData); | |
1034 | } | |
40982be5 | 1035 | |
417b57b3 | 1036 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
1037 | continue; |
1038 | if (!len) | |
1039 | return -EINVAL; | |
1040 | ||
1041 | s->bLength = 2 * (len + 1); | |
1042 | return s->bLength; | |
1043 | } | |
1044 | ||
19824d5e AP |
1045 | if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) { |
1046 | struct usb_os_string *b = buf; | |
1047 | b->bLength = sizeof(*b); | |
1048 | b->bDescriptorType = USB_DT_STRING; | |
1049 | compiletime_assert( | |
1050 | sizeof(b->qwSignature) == sizeof(cdev->qw_sign), | |
1051 | "qwSignature size must be equal to qw_sign"); | |
1052 | memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature)); | |
1053 | b->bMS_VendorCode = cdev->b_vendor_code; | |
1054 | b->bPad = 0; | |
1055 | return sizeof(*b); | |
1056 | } | |
1057 | ||
9bb2859f SAS |
1058 | list_for_each_entry(uc, &cdev->gstrings, list) { |
1059 | struct usb_gadget_strings **sp; | |
1060 | ||
1061 | sp = get_containers_gs(uc); | |
1062 | len = lookup_string(sp, buf, language, id); | |
1063 | if (len > 0) | |
1064 | return len; | |
1065 | } | |
1066 | ||
ad1a8102 MN |
1067 | /* String IDs are device-scoped, so we look up each string |
1068 | * table we're told about. These lookups are infrequent; | |
1069 | * simpler-is-better here. | |
40982be5 DB |
1070 | */ |
1071 | if (composite->strings) { | |
1072 | len = lookup_string(composite->strings, buf, language, id); | |
1073 | if (len > 0) | |
1074 | return len; | |
1075 | } | |
1076 | list_for_each_entry(c, &cdev->configs, list) { | |
1077 | if (c->strings) { | |
1078 | len = lookup_string(c->strings, buf, language, id); | |
1079 | if (len > 0) | |
1080 | return len; | |
1081 | } | |
1082 | list_for_each_entry(f, &c->functions, list) { | |
1083 | if (!f->strings) | |
1084 | continue; | |
1085 | len = lookup_string(f->strings, buf, language, id); | |
1086 | if (len > 0) | |
1087 | return len; | |
1088 | } | |
1089 | } | |
1090 | return -EINVAL; | |
1091 | } | |
1092 | ||
1093 | /** | |
1094 | * usb_string_id() - allocate an unused string ID | |
1095 | * @cdev: the device whose string descriptor IDs are being allocated | |
1096 | * Context: single threaded during gadget setup | |
1097 | * | |
1098 | * @usb_string_id() is called from bind() callbacks to allocate | |
1099 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1100 | * then store that ID in the appropriate descriptors and string table. | |
1101 | * | |
f2adc4f8 MN |
1102 | * All string identifier should be allocated using this, |
1103 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
1104 | * that for example different functions don't wrongly assign different | |
1105 | * meanings to the same identifier. | |
40982be5 | 1106 | */ |
28824b18 | 1107 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
1108 | { |
1109 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
1110 | /* string id 0 is reserved by USB spec for list of |
1111 | * supported languages */ | |
1112 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
1113 | cdev->next_string_id++; |
1114 | return cdev->next_string_id; | |
1115 | } | |
1116 | return -ENODEV; | |
1117 | } | |
721e2e91 | 1118 | EXPORT_SYMBOL_GPL(usb_string_id); |
40982be5 | 1119 | |
f2adc4f8 MN |
1120 | /** |
1121 | * usb_string_ids() - allocate unused string IDs in batch | |
1122 | * @cdev: the device whose string descriptor IDs are being allocated | |
1123 | * @str: an array of usb_string objects to assign numbers to | |
1124 | * Context: single threaded during gadget setup | |
1125 | * | |
1126 | * @usb_string_ids() is called from bind() callbacks to allocate | |
1127 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1128 | * then copy IDs from the string table to the appropriate descriptors | |
1129 | * and string table for other languages. | |
1130 | * | |
1131 | * All string identifier should be allocated using this, | |
1132 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1133 | * example different functions don't wrongly assign different meanings | |
1134 | * to the same identifier. | |
1135 | */ | |
1136 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
1137 | { | |
1138 | int next = cdev->next_string_id; | |
1139 | ||
1140 | for (; str->s; ++str) { | |
1141 | if (unlikely(next >= 254)) | |
1142 | return -ENODEV; | |
1143 | str->id = ++next; | |
1144 | } | |
1145 | ||
1146 | cdev->next_string_id = next; | |
1147 | ||
1148 | return 0; | |
1149 | } | |
721e2e91 | 1150 | EXPORT_SYMBOL_GPL(usb_string_ids_tab); |
f2adc4f8 | 1151 | |
9bb2859f SAS |
1152 | static struct usb_gadget_string_container *copy_gadget_strings( |
1153 | struct usb_gadget_strings **sp, unsigned n_gstrings, | |
1154 | unsigned n_strings) | |
1155 | { | |
1156 | struct usb_gadget_string_container *uc; | |
1157 | struct usb_gadget_strings **gs_array; | |
1158 | struct usb_gadget_strings *gs; | |
1159 | struct usb_string *s; | |
1160 | unsigned mem; | |
1161 | unsigned n_gs; | |
1162 | unsigned n_s; | |
1163 | void *stash; | |
1164 | ||
1165 | mem = sizeof(*uc); | |
1166 | mem += sizeof(void *) * (n_gstrings + 1); | |
1167 | mem += sizeof(struct usb_gadget_strings) * n_gstrings; | |
1168 | mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings); | |
1169 | uc = kmalloc(mem, GFP_KERNEL); | |
1170 | if (!uc) | |
1171 | return ERR_PTR(-ENOMEM); | |
1172 | gs_array = get_containers_gs(uc); | |
1173 | stash = uc->stash; | |
1174 | stash += sizeof(void *) * (n_gstrings + 1); | |
1175 | for (n_gs = 0; n_gs < n_gstrings; n_gs++) { | |
1176 | struct usb_string *org_s; | |
1177 | ||
1178 | gs_array[n_gs] = stash; | |
1179 | gs = gs_array[n_gs]; | |
1180 | stash += sizeof(struct usb_gadget_strings); | |
1181 | gs->language = sp[n_gs]->language; | |
1182 | gs->strings = stash; | |
1183 | org_s = sp[n_gs]->strings; | |
1184 | ||
1185 | for (n_s = 0; n_s < n_strings; n_s++) { | |
1186 | s = stash; | |
1187 | stash += sizeof(struct usb_string); | |
1188 | if (org_s->s) | |
1189 | s->s = org_s->s; | |
1190 | else | |
1191 | s->s = ""; | |
1192 | org_s++; | |
1193 | } | |
1194 | s = stash; | |
1195 | s->s = NULL; | |
1196 | stash += sizeof(struct usb_string); | |
1197 | ||
1198 | } | |
1199 | gs_array[n_gs] = NULL; | |
1200 | return uc; | |
1201 | } | |
1202 | ||
1203 | /** | |
1204 | * usb_gstrings_attach() - attach gadget strings to a cdev and assign ids | |
1205 | * @cdev: the device whose string descriptor IDs are being allocated | |
1206 | * and attached. | |
1207 | * @sp: an array of usb_gadget_strings to attach. | |
1208 | * @n_strings: number of entries in each usb_strings array (sp[]->strings) | |
1209 | * | |
1210 | * This function will create a deep copy of usb_gadget_strings and usb_string | |
1211 | * and attach it to the cdev. The actual string (usb_string.s) will not be | |
1212 | * copied but only a referenced will be made. The struct usb_gadget_strings | |
06ed0de5 | 1213 | * array may contain multiple languages and should be NULL terminated. |
9bb2859f SAS |
1214 | * The ->language pointer of each struct usb_gadget_strings has to contain the |
1215 | * same amount of entries. | |
1216 | * For instance: sp[0] is en-US, sp[1] is es-ES. It is expected that the first | |
06ed0de5 | 1217 | * usb_string entry of es-ES contains the translation of the first usb_string |
9bb2859f SAS |
1218 | * entry of en-US. Therefore both entries become the same id assign. |
1219 | */ | |
1220 | struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, | |
1221 | struct usb_gadget_strings **sp, unsigned n_strings) | |
1222 | { | |
1223 | struct usb_gadget_string_container *uc; | |
1224 | struct usb_gadget_strings **n_gs; | |
1225 | unsigned n_gstrings = 0; | |
1226 | unsigned i; | |
1227 | int ret; | |
1228 | ||
1229 | for (i = 0; sp[i]; i++) | |
1230 | n_gstrings++; | |
1231 | ||
1232 | if (!n_gstrings) | |
1233 | return ERR_PTR(-EINVAL); | |
1234 | ||
1235 | uc = copy_gadget_strings(sp, n_gstrings, n_strings); | |
1236 | if (IS_ERR(uc)) | |
dad4babe | 1237 | return ERR_CAST(uc); |
9bb2859f SAS |
1238 | |
1239 | n_gs = get_containers_gs(uc); | |
1240 | ret = usb_string_ids_tab(cdev, n_gs[0]->strings); | |
1241 | if (ret) | |
1242 | goto err; | |
1243 | ||
1244 | for (i = 1; i < n_gstrings; i++) { | |
1245 | struct usb_string *m_s; | |
1246 | struct usb_string *s; | |
1247 | unsigned n; | |
1248 | ||
1249 | m_s = n_gs[0]->strings; | |
1250 | s = n_gs[i]->strings; | |
1251 | for (n = 0; n < n_strings; n++) { | |
1252 | s->id = m_s->id; | |
1253 | s++; | |
1254 | m_s++; | |
1255 | } | |
1256 | } | |
1257 | list_add_tail(&uc->list, &cdev->gstrings); | |
1258 | return n_gs[0]->strings; | |
1259 | err: | |
1260 | kfree(uc); | |
1261 | return ERR_PTR(ret); | |
1262 | } | |
1263 | EXPORT_SYMBOL_GPL(usb_gstrings_attach); | |
1264 | ||
f2adc4f8 MN |
1265 | /** |
1266 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 1267 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
1268 | * @n: number of string IDs to allocate |
1269 | * Context: single threaded during gadget setup | |
1270 | * | |
1271 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 1272 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
1273 | * is, returns last requested ID which is now very useful information. |
1274 | * | |
1275 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
1276 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1277 | * then store that ID in the appropriate descriptors and string table. | |
1278 | * | |
1279 | * All string identifier should be allocated using this, | |
1280 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1281 | * example different functions don't wrongly assign different meanings | |
1282 | * to the same identifier. | |
1283 | */ | |
1284 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
1285 | { | |
1286 | unsigned next = c->next_string_id; | |
1287 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
1288 | return -ENODEV; | |
1289 | c->next_string_id += n; | |
1290 | return next + 1; | |
1291 | } | |
721e2e91 | 1292 | EXPORT_SYMBOL_GPL(usb_string_ids_n); |
f2adc4f8 | 1293 | |
40982be5 DB |
1294 | /*-------------------------------------------------------------------------*/ |
1295 | ||
1296 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1297 | { | |
a7c12eaf FB |
1298 | struct usb_composite_dev *cdev; |
1299 | ||
40982be5 DB |
1300 | if (req->status || req->actual != req->length) |
1301 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1302 | "setup complete --> %d, %d/%d\n", | |
1303 | req->status, req->actual, req->length); | |
a7c12eaf FB |
1304 | |
1305 | /* | |
1306 | * REVIST The same ep0 requests are shared with function drivers | |
1307 | * so they don't have to maintain the same ->complete() stubs. | |
1308 | * | |
1309 | * Because of that, we need to check for the validity of ->context | |
1310 | * here, even though we know we've set it to something useful. | |
1311 | */ | |
1312 | if (!req->context) | |
1313 | return; | |
1314 | ||
1315 | cdev = req->context; | |
1316 | ||
1317 | if (cdev->req == req) | |
1318 | cdev->setup_pending = false; | |
1319 | else if (cdev->os_desc_req == req) | |
1320 | cdev->os_desc_pending = false; | |
1321 | else | |
1322 | WARN(1, "unknown request %p\n", req); | |
1323 | } | |
1324 | ||
1325 | static int composite_ep0_queue(struct usb_composite_dev *cdev, | |
1326 | struct usb_request *req, gfp_t gfp_flags) | |
1327 | { | |
1328 | int ret; | |
1329 | ||
1330 | ret = usb_ep_queue(cdev->gadget->ep0, req, gfp_flags); | |
1331 | if (ret == 0) { | |
1332 | if (cdev->req == req) | |
1333 | cdev->setup_pending = true; | |
1334 | else if (cdev->os_desc_req == req) | |
1335 | cdev->os_desc_pending = true; | |
1336 | else | |
1337 | WARN(1, "unknown request %p\n", req); | |
1338 | } | |
1339 | ||
1340 | return ret; | |
40982be5 DB |
1341 | } |
1342 | ||
37a3a533 AP |
1343 | static int count_ext_compat(struct usb_configuration *c) |
1344 | { | |
1345 | int i, res; | |
1346 | ||
1347 | res = 0; | |
1348 | for (i = 0; i < c->next_interface_id; ++i) { | |
1349 | struct usb_function *f; | |
1350 | int j; | |
1351 | ||
1352 | f = c->interface[i]; | |
1353 | for (j = 0; j < f->os_desc_n; ++j) { | |
1354 | struct usb_os_desc *d; | |
1355 | ||
1356 | if (i != f->os_desc_table[j].if_id) | |
1357 | continue; | |
1358 | d = f->os_desc_table[j].os_desc; | |
1359 | if (d && d->ext_compat_id) | |
1360 | ++res; | |
1361 | } | |
1362 | } | |
1363 | BUG_ON(res > 255); | |
1364 | return res; | |
1365 | } | |
1366 | ||
1367 | static void fill_ext_compat(struct usb_configuration *c, u8 *buf) | |
1368 | { | |
1369 | int i, count; | |
1370 | ||
1371 | count = 16; | |
1372 | for (i = 0; i < c->next_interface_id; ++i) { | |
1373 | struct usb_function *f; | |
1374 | int j; | |
1375 | ||
1376 | f = c->interface[i]; | |
1377 | for (j = 0; j < f->os_desc_n; ++j) { | |
1378 | struct usb_os_desc *d; | |
1379 | ||
1380 | if (i != f->os_desc_table[j].if_id) | |
1381 | continue; | |
1382 | d = f->os_desc_table[j].os_desc; | |
1383 | if (d && d->ext_compat_id) { | |
1384 | *buf++ = i; | |
1385 | *buf++ = 0x01; | |
1386 | memcpy(buf, d->ext_compat_id, 16); | |
1387 | buf += 22; | |
1388 | } else { | |
1389 | ++buf; | |
1390 | *buf = 0x01; | |
1391 | buf += 23; | |
1392 | } | |
1393 | count += 24; | |
1394 | if (count >= 4096) | |
1395 | return; | |
1396 | } | |
1397 | } | |
1398 | } | |
1399 | ||
1400 | static int count_ext_prop(struct usb_configuration *c, int interface) | |
1401 | { | |
1402 | struct usb_function *f; | |
849b1333 | 1403 | int j; |
37a3a533 AP |
1404 | |
1405 | f = c->interface[interface]; | |
1406 | for (j = 0; j < f->os_desc_n; ++j) { | |
1407 | struct usb_os_desc *d; | |
1408 | ||
1409 | if (interface != f->os_desc_table[j].if_id) | |
1410 | continue; | |
1411 | d = f->os_desc_table[j].os_desc; | |
1412 | if (d && d->ext_compat_id) | |
1413 | return d->ext_prop_count; | |
1414 | } | |
849b1333 | 1415 | return 0; |
37a3a533 AP |
1416 | } |
1417 | ||
1418 | static int len_ext_prop(struct usb_configuration *c, int interface) | |
1419 | { | |
1420 | struct usb_function *f; | |
1421 | struct usb_os_desc *d; | |
1422 | int j, res; | |
1423 | ||
1424 | res = 10; /* header length */ | |
1425 | f = c->interface[interface]; | |
1426 | for (j = 0; j < f->os_desc_n; ++j) { | |
1427 | if (interface != f->os_desc_table[j].if_id) | |
1428 | continue; | |
1429 | d = f->os_desc_table[j].os_desc; | |
1430 | if (d) | |
1431 | return min(res + d->ext_prop_len, 4096); | |
1432 | } | |
1433 | return res; | |
1434 | } | |
1435 | ||
1436 | static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf) | |
1437 | { | |
1438 | struct usb_function *f; | |
1439 | struct usb_os_desc *d; | |
1440 | struct usb_os_desc_ext_prop *ext_prop; | |
1441 | int j, count, n, ret; | |
1442 | u8 *start = buf; | |
1443 | ||
1444 | f = c->interface[interface]; | |
1445 | for (j = 0; j < f->os_desc_n; ++j) { | |
1446 | if (interface != f->os_desc_table[j].if_id) | |
1447 | continue; | |
1448 | d = f->os_desc_table[j].os_desc; | |
1449 | if (d) | |
1450 | list_for_each_entry(ext_prop, &d->ext_prop, entry) { | |
1451 | /* 4kB minus header length */ | |
1452 | n = buf - start; | |
1453 | if (n >= 4086) | |
1454 | return 0; | |
1455 | ||
1456 | count = ext_prop->data_len + | |
1457 | ext_prop->name_len + 14; | |
1458 | if (count > 4086 - n) | |
1459 | return -EINVAL; | |
1460 | usb_ext_prop_put_size(buf, count); | |
1461 | usb_ext_prop_put_type(buf, ext_prop->type); | |
1462 | ret = usb_ext_prop_put_name(buf, ext_prop->name, | |
1463 | ext_prop->name_len); | |
1464 | if (ret < 0) | |
1465 | return ret; | |
1466 | switch (ext_prop->type) { | |
1467 | case USB_EXT_PROP_UNICODE: | |
1468 | case USB_EXT_PROP_UNICODE_ENV: | |
1469 | case USB_EXT_PROP_UNICODE_LINK: | |
1470 | usb_ext_prop_put_unicode(buf, ret, | |
1471 | ext_prop->data, | |
1472 | ext_prop->data_len); | |
1473 | break; | |
1474 | case USB_EXT_PROP_BINARY: | |
1475 | usb_ext_prop_put_binary(buf, ret, | |
1476 | ext_prop->data, | |
1477 | ext_prop->data_len); | |
1478 | break; | |
1479 | case USB_EXT_PROP_LE32: | |
1480 | /* not implemented */ | |
1481 | case USB_EXT_PROP_BE32: | |
1482 | /* not implemented */ | |
1483 | default: | |
1484 | return -EINVAL; | |
1485 | } | |
1486 | buf += count; | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | return 0; | |
1491 | } | |
1492 | ||
40982be5 DB |
1493 | /* |
1494 | * The setup() callback implements all the ep0 functionality that's | |
1495 | * not handled lower down, in hardware or the hardware driver(like | |
1496 | * device and endpoint feature flags, and their status). It's all | |
1497 | * housekeeping for the gadget function we're implementing. Most of | |
1498 | * the work is in config and function specific setup. | |
1499 | */ | |
2d5a8899 | 1500 | int |
40982be5 DB |
1501 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) |
1502 | { | |
1503 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1504 | struct usb_request *req = cdev->req; | |
1505 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1506 | int status = 0; |
40982be5 | 1507 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1508 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1509 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1510 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1511 | struct usb_function *f = NULL; | |
5242658d | 1512 | u8 endp; |
40982be5 DB |
1513 | |
1514 | /* partial re-init of the response message; the function or the | |
1515 | * gadget might need to intercept e.g. a control-OUT completion | |
1516 | * when we delegate to it. | |
1517 | */ | |
1518 | req->zero = 0; | |
57943716 | 1519 | req->context = cdev; |
40982be5 | 1520 | req->complete = composite_setup_complete; |
2edb11cb | 1521 | req->length = 0; |
40982be5 DB |
1522 | gadget->ep0->driver_data = cdev; |
1523 | ||
232c0102 AP |
1524 | /* |
1525 | * Don't let non-standard requests match any of the cases below | |
1526 | * by accident. | |
1527 | */ | |
1528 | if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) | |
1529 | goto unknown; | |
1530 | ||
40982be5 DB |
1531 | switch (ctrl->bRequest) { |
1532 | ||
1533 | /* we handle all standard USB descriptors */ | |
1534 | case USB_REQ_GET_DESCRIPTOR: | |
1535 | if (ctrl->bRequestType != USB_DIR_IN) | |
1536 | goto unknown; | |
1537 | switch (w_value >> 8) { | |
1538 | ||
1539 | case USB_DT_DEVICE: | |
1540 | cdev->desc.bNumConfigurations = | |
1541 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1542 | cdev->desc.bMaxPacketSize0 = |
1543 | cdev->gadget->ep0->maxpacket; | |
1544 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1545 | if (gadget->speed >= USB_SPEED_SUPER) { |
1a853291 | 1546 | cdev->desc.bcdUSB = cpu_to_le16(0x0310); |
a8f21156 SAS |
1547 | cdev->desc.bMaxPacketSize0 = 9; |
1548 | } else { | |
bdb64d72 | 1549 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1550 | } |
5527e733 IK |
1551 | } else { |
1552 | cdev->desc.bcdUSB = cpu_to_le16(0x0200); | |
bdb64d72 TB |
1553 | } |
1554 | ||
40982be5 DB |
1555 | value = min(w_length, (u16) sizeof cdev->desc); |
1556 | memcpy(req->buf, &cdev->desc, value); | |
1557 | break; | |
1558 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1559 | if (!gadget_is_dualspeed(gadget) || |
1560 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1561 | break; |
1562 | device_qual(cdev); | |
1563 | value = min_t(int, w_length, | |
1564 | sizeof(struct usb_qualifier_descriptor)); | |
1565 | break; | |
1566 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1567 | if (!gadget_is_dualspeed(gadget) || |
1568 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1569 | break; |
1570 | /* FALLTHROUGH */ | |
1571 | case USB_DT_CONFIG: | |
1572 | value = config_desc(cdev, w_value); | |
1573 | if (value >= 0) | |
1574 | value = min(w_length, (u16) value); | |
1575 | break; | |
1576 | case USB_DT_STRING: | |
1577 | value = get_string(cdev, req->buf, | |
1578 | w_index, w_value & 0xff); | |
1579 | if (value >= 0) | |
1580 | value = min(w_length, (u16) value); | |
1581 | break; | |
bdb64d72 TB |
1582 | case USB_DT_BOS: |
1583 | if (gadget_is_superspeed(gadget)) { | |
1584 | value = bos_desc(cdev); | |
1585 | value = min(w_length, (u16) value); | |
1586 | } | |
1587 | break; | |
53e6242d ML |
1588 | case USB_DT_OTG: |
1589 | if (gadget_is_otg(gadget)) { | |
1590 | struct usb_configuration *config; | |
1591 | int otg_desc_len = 0; | |
1592 | ||
1593 | if (cdev->config) | |
1594 | config = cdev->config; | |
1595 | else | |
1596 | config = list_first_entry( | |
1597 | &cdev->configs, | |
1598 | struct usb_configuration, list); | |
1599 | if (!config) | |
1600 | goto done; | |
1601 | ||
1602 | if (gadget->otg_caps && | |
1603 | (gadget->otg_caps->otg_rev >= 0x0200)) | |
1604 | otg_desc_len += sizeof( | |
1605 | struct usb_otg20_descriptor); | |
1606 | else | |
1607 | otg_desc_len += sizeof( | |
1608 | struct usb_otg_descriptor); | |
1609 | ||
1610 | value = min_t(int, w_length, otg_desc_len); | |
1611 | memcpy(req->buf, config->descriptors[0], value); | |
1612 | } | |
1613 | break; | |
40982be5 DB |
1614 | } |
1615 | break; | |
1616 | ||
1617 | /* any number of configs can work */ | |
1618 | case USB_REQ_SET_CONFIGURATION: | |
1619 | if (ctrl->bRequestType != 0) | |
1620 | goto unknown; | |
1621 | if (gadget_is_otg(gadget)) { | |
1622 | if (gadget->a_hnp_support) | |
1623 | DBG(cdev, "HNP available\n"); | |
1624 | else if (gadget->a_alt_hnp_support) | |
1625 | DBG(cdev, "HNP on another port\n"); | |
1626 | else | |
1627 | VDBG(cdev, "HNP inactive\n"); | |
1628 | } | |
1629 | spin_lock(&cdev->lock); | |
1630 | value = set_config(cdev, ctrl, w_value); | |
1631 | spin_unlock(&cdev->lock); | |
1632 | break; | |
1633 | case USB_REQ_GET_CONFIGURATION: | |
1634 | if (ctrl->bRequestType != USB_DIR_IN) | |
1635 | goto unknown; | |
1636 | if (cdev->config) | |
1637 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1638 | else | |
1639 | *(u8 *)req->buf = 0; | |
1640 | value = min(w_length, (u16) 1); | |
1641 | break; | |
1642 | ||
1643 | /* function drivers must handle get/set altsetting; if there's | |
1644 | * no get() method, we know only altsetting zero works. | |
1645 | */ | |
1646 | case USB_REQ_SET_INTERFACE: | |
1647 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1648 | goto unknown; | |
ff085de7 | 1649 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1650 | break; |
08889517 | 1651 | f = cdev->config->interface[intf]; |
40982be5 DB |
1652 | if (!f) |
1653 | break; | |
dd4dff8b | 1654 | if (w_value && !f->set_alt) |
40982be5 DB |
1655 | break; |
1656 | value = f->set_alt(f, w_index, w_value); | |
1b9ba000 RQ |
1657 | if (value == USB_GADGET_DELAYED_STATUS) { |
1658 | DBG(cdev, | |
1659 | "%s: interface %d (%s) requested delayed status\n", | |
1660 | __func__, intf, f->name); | |
1661 | cdev->delayed_status++; | |
1662 | DBG(cdev, "delayed_status count %d\n", | |
1663 | cdev->delayed_status); | |
1664 | } | |
40982be5 DB |
1665 | break; |
1666 | case USB_REQ_GET_INTERFACE: | |
1667 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1668 | goto unknown; | |
ff085de7 | 1669 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1670 | break; |
08889517 | 1671 | f = cdev->config->interface[intf]; |
40982be5 DB |
1672 | if (!f) |
1673 | break; | |
1674 | /* lots of interfaces only need altsetting zero... */ | |
1675 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1676 | if (value < 0) | |
1677 | break; | |
1678 | *((u8 *)req->buf) = value; | |
1679 | value = min(w_length, (u16) 1); | |
1680 | break; | |
bdb64d72 TB |
1681 | |
1682 | /* | |
1683 | * USB 3.0 additions: | |
1684 | * Function driver should handle get_status request. If such cb | |
1685 | * wasn't supplied we respond with default value = 0 | |
1686 | * Note: function driver should supply such cb only for the first | |
1687 | * interface of the function | |
1688 | */ | |
1689 | case USB_REQ_GET_STATUS: | |
1690 | if (!gadget_is_superspeed(gadget)) | |
1691 | goto unknown; | |
1692 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1693 | goto unknown; | |
1694 | value = 2; /* This is the length of the get_status reply */ | |
1695 | put_unaligned_le16(0, req->buf); | |
1696 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1697 | break; | |
1698 | f = cdev->config->interface[intf]; | |
1699 | if (!f) | |
1700 | break; | |
1701 | status = f->get_status ? f->get_status(f) : 0; | |
1702 | if (status < 0) | |
1703 | break; | |
1704 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1705 | break; | |
1706 | /* | |
1707 | * Function drivers should handle SetFeature/ClearFeature | |
1708 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1709 | * only for the first interface of the function | |
1710 | */ | |
1711 | case USB_REQ_CLEAR_FEATURE: | |
1712 | case USB_REQ_SET_FEATURE: | |
1713 | if (!gadget_is_superspeed(gadget)) | |
1714 | goto unknown; | |
1715 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1716 | goto unknown; | |
1717 | switch (w_value) { | |
1718 | case USB_INTRF_FUNC_SUSPEND: | |
1719 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1720 | break; | |
1721 | f = cdev->config->interface[intf]; | |
1722 | if (!f) | |
1723 | break; | |
1724 | value = 0; | |
1725 | if (f->func_suspend) | |
1726 | value = f->func_suspend(f, w_index >> 8); | |
1727 | if (value < 0) { | |
1728 | ERROR(cdev, | |
1729 | "func_suspend() returned error %d\n", | |
1730 | value); | |
1731 | value = 0; | |
1732 | } | |
1733 | break; | |
1734 | } | |
1735 | break; | |
40982be5 DB |
1736 | default: |
1737 | unknown: | |
37a3a533 AP |
1738 | /* |
1739 | * OS descriptors handling | |
1740 | */ | |
1741 | if (cdev->use_os_string && cdev->os_desc_config && | |
df6738d0 | 1742 | (ctrl->bRequestType & USB_TYPE_VENDOR) && |
37a3a533 AP |
1743 | ctrl->bRequest == cdev->b_vendor_code) { |
1744 | struct usb_request *req; | |
1745 | struct usb_configuration *os_desc_cfg; | |
1746 | u8 *buf; | |
1747 | int interface; | |
1748 | int count = 0; | |
1749 | ||
1750 | req = cdev->os_desc_req; | |
57943716 | 1751 | req->context = cdev; |
37a3a533 AP |
1752 | req->complete = composite_setup_complete; |
1753 | buf = req->buf; | |
1754 | os_desc_cfg = cdev->os_desc_config; | |
1755 | memset(buf, 0, w_length); | |
1756 | buf[5] = 0x01; | |
1757 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1758 | case USB_RECIP_DEVICE: | |
1759 | if (w_index != 0x4 || (w_value >> 8)) | |
1760 | break; | |
1761 | buf[6] = w_index; | |
1762 | if (w_length == 0x10) { | |
1763 | /* Number of ext compat interfaces */ | |
1764 | count = count_ext_compat(os_desc_cfg); | |
1765 | buf[8] = count; | |
1766 | count *= 24; /* 24 B/ext compat desc */ | |
1767 | count += 16; /* header */ | |
1768 | put_unaligned_le32(count, buf); | |
1769 | value = w_length; | |
1770 | } else { | |
1771 | /* "extended compatibility ID"s */ | |
1772 | count = count_ext_compat(os_desc_cfg); | |
1773 | buf[8] = count; | |
1774 | count *= 24; /* 24 B/ext compat desc */ | |
1775 | count += 16; /* header */ | |
1776 | put_unaligned_le32(count, buf); | |
1777 | buf += 16; | |
1778 | fill_ext_compat(os_desc_cfg, buf); | |
1779 | value = w_length; | |
1780 | } | |
1781 | break; | |
1782 | case USB_RECIP_INTERFACE: | |
1783 | if (w_index != 0x5 || (w_value >> 8)) | |
1784 | break; | |
1785 | interface = w_value & 0xFF; | |
1786 | buf[6] = w_index; | |
1787 | if (w_length == 0x0A) { | |
1788 | count = count_ext_prop(os_desc_cfg, | |
1789 | interface); | |
1790 | put_unaligned_le16(count, buf + 8); | |
1791 | count = len_ext_prop(os_desc_cfg, | |
1792 | interface); | |
1793 | put_unaligned_le32(count, buf); | |
1794 | ||
1795 | value = w_length; | |
1796 | } else { | |
1797 | count = count_ext_prop(os_desc_cfg, | |
1798 | interface); | |
1799 | put_unaligned_le16(count, buf + 8); | |
1800 | count = len_ext_prop(os_desc_cfg, | |
1801 | interface); | |
1802 | put_unaligned_le32(count, buf); | |
1803 | buf += 10; | |
1804 | value = fill_ext_prop(os_desc_cfg, | |
1805 | interface, buf); | |
1806 | if (value < 0) | |
1807 | return value; | |
1808 | ||
1809 | value = w_length; | |
1810 | } | |
1811 | break; | |
1812 | } | |
1813 | req->length = value; | |
57943716 | 1814 | req->context = cdev; |
37a3a533 | 1815 | req->zero = value < w_length; |
a7c12eaf | 1816 | value = composite_ep0_queue(cdev, req, GFP_ATOMIC); |
37a3a533 AP |
1817 | if (value < 0) { |
1818 | DBG(cdev, "ep_queue --> %d\n", value); | |
1819 | req->status = 0; | |
1820 | composite_setup_complete(gadget->ep0, req); | |
1821 | } | |
1822 | return value; | |
1823 | } | |
1824 | ||
40982be5 DB |
1825 | VDBG(cdev, |
1826 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1827 | ctrl->bRequestType, ctrl->bRequest, | |
1828 | w_value, w_index, w_length); | |
1829 | ||
5242658d LP |
1830 | /* functions always handle their interfaces and endpoints... |
1831 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 DB |
1832 | * configuration code. |
1833 | * | |
1834 | * REVISIT it could make sense to let the composite device | |
1835 | * take such requests too, if that's ever needed: to work | |
1836 | * in config 0, etc. | |
1837 | */ | |
b4c21f0b KVA |
1838 | if (cdev->config) { |
1839 | list_for_each_entry(f, &cdev->config->functions, list) | |
1840 | if (f->req_match && f->req_match(f, ctrl)) | |
1841 | goto try_fun_setup; | |
1842 | f = NULL; | |
1843 | } | |
1844 | ||
5242658d LP |
1845 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1846 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1847 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1848 | break; |
1849 | f = cdev->config->interface[intf]; | |
5242658d LP |
1850 | break; |
1851 | ||
1852 | case USB_RECIP_ENDPOINT: | |
1853 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); | |
1854 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1855 | if (test_bit(endp, f->endpoints)) | |
1856 | break; | |
1857 | } | |
1858 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1859 | f = NULL; |
5242658d | 1860 | break; |
40982be5 | 1861 | } |
f563d230 | 1862 | try_fun_setup: |
5242658d LP |
1863 | if (f && f->setup) |
1864 | value = f->setup(f, ctrl); | |
1865 | else { | |
40982be5 DB |
1866 | struct usb_configuration *c; |
1867 | ||
1868 | c = cdev->config; | |
a01091e5 AP |
1869 | if (!c) |
1870 | goto done; | |
1871 | ||
1872 | /* try current config's setup */ | |
1873 | if (c->setup) { | |
40982be5 | 1874 | value = c->setup(c, ctrl); |
a01091e5 AP |
1875 | goto done; |
1876 | } | |
1877 | ||
1878 | /* try the only function in the current config */ | |
1879 | if (!list_is_singular(&c->functions)) | |
1880 | goto done; | |
1881 | f = list_first_entry(&c->functions, struct usb_function, | |
1882 | list); | |
1883 | if (f->setup) | |
1884 | value = f->setup(f, ctrl); | |
40982be5 DB |
1885 | } |
1886 | ||
1887 | goto done; | |
1888 | } | |
1889 | ||
1890 | /* respond with data transfer before status phase? */ | |
1b9ba000 | 1891 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 | 1892 | req->length = value; |
57943716 | 1893 | req->context = cdev; |
40982be5 | 1894 | req->zero = value < w_length; |
a7c12eaf | 1895 | value = composite_ep0_queue(cdev, req, GFP_ATOMIC); |
40982be5 DB |
1896 | if (value < 0) { |
1897 | DBG(cdev, "ep_queue --> %d\n", value); | |
1898 | req->status = 0; | |
1899 | composite_setup_complete(gadget->ep0, req); | |
1900 | } | |
1b9ba000 RQ |
1901 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1902 | WARN(cdev, | |
1903 | "%s: Delayed status not supported for w_length != 0", | |
1904 | __func__); | |
40982be5 DB |
1905 | } |
1906 | ||
1907 | done: | |
1908 | /* device either stalls (value < 0) or reports success */ | |
1909 | return value; | |
1910 | } | |
1911 | ||
2d5a8899 | 1912 | void composite_disconnect(struct usb_gadget *gadget) |
40982be5 DB |
1913 | { |
1914 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1915 | unsigned long flags; | |
1916 | ||
1917 | /* REVISIT: should we have config and device level | |
1918 | * disconnect callbacks? | |
1919 | */ | |
1920 | spin_lock_irqsave(&cdev->lock, flags); | |
1921 | if (cdev->config) | |
1922 | reset_config(cdev); | |
ffe0b335 SAS |
1923 | if (cdev->driver->disconnect) |
1924 | cdev->driver->disconnect(cdev); | |
40982be5 DB |
1925 | spin_unlock_irqrestore(&cdev->lock, flags); |
1926 | } | |
1927 | ||
1928 | /*-------------------------------------------------------------------------*/ | |
1929 | ||
ce26bd23 GKH |
1930 | static ssize_t suspended_show(struct device *dev, struct device_attribute *attr, |
1931 | char *buf) | |
f48cf80f FC |
1932 | { |
1933 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1934 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1935 | ||
1936 | return sprintf(buf, "%d\n", cdev->suspended); | |
1937 | } | |
ce26bd23 | 1938 | static DEVICE_ATTR_RO(suspended); |
f48cf80f | 1939 | |
779d516c | 1940 | static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver) |
40982be5 DB |
1941 | { |
1942 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1943 | ||
1944 | /* composite_disconnect() must already have been called | |
1945 | * by the underlying peripheral controller driver! | |
1946 | * so there's no i/o concurrency that could affect the | |
1947 | * state protected by cdev->lock. | |
1948 | */ | |
1949 | WARN_ON(cdev->config); | |
1950 | ||
1951 | while (!list_empty(&cdev->configs)) { | |
1952 | struct usb_configuration *c; | |
40982be5 DB |
1953 | c = list_first_entry(&cdev->configs, |
1954 | struct usb_configuration, list); | |
51cce6fc | 1955 | remove_config(cdev, c); |
40982be5 | 1956 | } |
779d516c | 1957 | if (cdev->driver->unbind && unbind_driver) |
ffe0b335 | 1958 | cdev->driver->unbind(cdev); |
40982be5 | 1959 | |
a5923340 SAS |
1960 | composite_dev_cleanup(cdev); |
1961 | ||
cc2683c3 | 1962 | kfree(cdev->def_manufacturer); |
40982be5 DB |
1963 | kfree(cdev); |
1964 | set_gadget_data(gadget, NULL); | |
40982be5 DB |
1965 | } |
1966 | ||
779d516c SAS |
1967 | static void composite_unbind(struct usb_gadget *gadget) |
1968 | { | |
1969 | __composite_unbind(gadget, true); | |
1970 | } | |
1971 | ||
7d16e8d3 SAS |
1972 | static void update_unchanged_dev_desc(struct usb_device_descriptor *new, |
1973 | const struct usb_device_descriptor *old) | |
1974 | { | |
1975 | __le16 idVendor; | |
1976 | __le16 idProduct; | |
1977 | __le16 bcdDevice; | |
1cf0d264 | 1978 | u8 iSerialNumber; |
03de9bf6 | 1979 | u8 iManufacturer; |
2d35ee47 | 1980 | u8 iProduct; |
7d16e8d3 SAS |
1981 | |
1982 | /* | |
1983 | * these variables may have been set in | |
1984 | * usb_composite_overwrite_options() | |
1985 | */ | |
1986 | idVendor = new->idVendor; | |
1987 | idProduct = new->idProduct; | |
1988 | bcdDevice = new->bcdDevice; | |
1cf0d264 | 1989 | iSerialNumber = new->iSerialNumber; |
03de9bf6 | 1990 | iManufacturer = new->iManufacturer; |
2d35ee47 | 1991 | iProduct = new->iProduct; |
7d16e8d3 SAS |
1992 | |
1993 | *new = *old; | |
1994 | if (idVendor) | |
1995 | new->idVendor = idVendor; | |
1996 | if (idProduct) | |
1997 | new->idProduct = idProduct; | |
1998 | if (bcdDevice) | |
1999 | new->bcdDevice = bcdDevice; | |
ed9cbda6 SAS |
2000 | else |
2001 | new->bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1cf0d264 SAS |
2002 | if (iSerialNumber) |
2003 | new->iSerialNumber = iSerialNumber; | |
03de9bf6 SAS |
2004 | if (iManufacturer) |
2005 | new->iManufacturer = iManufacturer; | |
2d35ee47 SAS |
2006 | if (iProduct) |
2007 | new->iProduct = iProduct; | |
7d16e8d3 SAS |
2008 | } |
2009 | ||
a5923340 SAS |
2010 | int composite_dev_prepare(struct usb_composite_driver *composite, |
2011 | struct usb_composite_dev *cdev) | |
ffe0b335 | 2012 | { |
a5923340 SAS |
2013 | struct usb_gadget *gadget = cdev->gadget; |
2014 | int ret = -ENOMEM; | |
40982be5 DB |
2015 | |
2016 | /* preallocate control response and buffer */ | |
2017 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
2018 | if (!cdev->req) | |
a5923340 SAS |
2019 | return -ENOMEM; |
2020 | ||
e13f17ff | 2021 | cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); |
40982be5 DB |
2022 | if (!cdev->req->buf) |
2023 | goto fail; | |
a5923340 SAS |
2024 | |
2025 | ret = device_create_file(&gadget->dev, &dev_attr_suspended); | |
2026 | if (ret) | |
2027 | goto fail_dev; | |
2028 | ||
40982be5 | 2029 | cdev->req->complete = composite_setup_complete; |
57943716 | 2030 | cdev->req->context = cdev; |
40982be5 DB |
2031 | gadget->ep0->driver_data = cdev; |
2032 | ||
40982be5 DB |
2033 | cdev->driver = composite; |
2034 | ||
37b5801e PM |
2035 | /* |
2036 | * As per USB compliance update, a device that is actively drawing | |
2037 | * more than 100mA from USB must report itself as bus-powered in | |
2038 | * the GetStatus(DEVICE) call. | |
2039 | */ | |
2040 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
2041 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
2042 | |
2043 | /* interface and string IDs start at zero via kzalloc. | |
2044 | * we force endpoints to start unassigned; few controller | |
2045 | * drivers will zero ep->driver_data. | |
2046 | */ | |
a5923340 SAS |
2047 | usb_ep_autoconfig_reset(gadget); |
2048 | return 0; | |
2049 | fail_dev: | |
2050 | kfree(cdev->req->buf); | |
2051 | fail: | |
2052 | usb_ep_free_request(gadget->ep0, cdev->req); | |
2053 | cdev->req = NULL; | |
2054 | return ret; | |
2055 | } | |
2056 | ||
37a3a533 AP |
2057 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
2058 | struct usb_ep *ep0) | |
2059 | { | |
2060 | int ret = 0; | |
2061 | ||
2062 | cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL); | |
2063 | if (!cdev->os_desc_req) { | |
2064 | ret = PTR_ERR(cdev->os_desc_req); | |
2065 | goto end; | |
2066 | } | |
2067 | ||
2068 | /* OS feature descriptor length <= 4kB */ | |
2069 | cdev->os_desc_req->buf = kmalloc(4096, GFP_KERNEL); | |
2070 | if (!cdev->os_desc_req->buf) { | |
2071 | ret = PTR_ERR(cdev->os_desc_req->buf); | |
2072 | kfree(cdev->os_desc_req); | |
2073 | goto end; | |
2074 | } | |
57943716 | 2075 | cdev->os_desc_req->context = cdev; |
37a3a533 AP |
2076 | cdev->os_desc_req->complete = composite_setup_complete; |
2077 | end: | |
2078 | return ret; | |
2079 | } | |
2080 | ||
a5923340 SAS |
2081 | void composite_dev_cleanup(struct usb_composite_dev *cdev) |
2082 | { | |
27a46633 SAS |
2083 | struct usb_gadget_string_container *uc, *tmp; |
2084 | ||
2085 | list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) { | |
2086 | list_del(&uc->list); | |
2087 | kfree(uc); | |
2088 | } | |
37a3a533 | 2089 | if (cdev->os_desc_req) { |
a7c12eaf FB |
2090 | if (cdev->os_desc_pending) |
2091 | usb_ep_dequeue(cdev->gadget->ep0, cdev->os_desc_req); | |
2092 | ||
37a3a533 AP |
2093 | kfree(cdev->os_desc_req->buf); |
2094 | usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req); | |
2095 | } | |
a5923340 | 2096 | if (cdev->req) { |
a7c12eaf FB |
2097 | if (cdev->setup_pending) |
2098 | usb_ep_dequeue(cdev->gadget->ep0, cdev->req); | |
2099 | ||
be0a8887 | 2100 | kfree(cdev->req->buf); |
a5923340 SAS |
2101 | usb_ep_free_request(cdev->gadget->ep0, cdev->req); |
2102 | } | |
88af8bbe | 2103 | cdev->next_string_id = 0; |
a5923340 SAS |
2104 | device_remove_file(&cdev->gadget->dev, &dev_attr_suspended); |
2105 | } | |
2106 | ||
2107 | static int composite_bind(struct usb_gadget *gadget, | |
2108 | struct usb_gadget_driver *gdriver) | |
2109 | { | |
2110 | struct usb_composite_dev *cdev; | |
2111 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
2112 | int status = -ENOMEM; | |
2113 | ||
2114 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
2115 | if (!cdev) | |
2116 | return status; | |
2117 | ||
2118 | spin_lock_init(&cdev->lock); | |
2119 | cdev->gadget = gadget; | |
2120 | set_gadget_data(gadget, cdev); | |
2121 | INIT_LIST_HEAD(&cdev->configs); | |
9bb2859f | 2122 | INIT_LIST_HEAD(&cdev->gstrings); |
a5923340 SAS |
2123 | |
2124 | status = composite_dev_prepare(composite, cdev); | |
2125 | if (status) | |
2126 | goto fail; | |
40982be5 DB |
2127 | |
2128 | /* composite gadget needs to assign strings for whole device (like | |
2129 | * serial number), register function drivers, potentially update | |
2130 | * power state and consumption, etc | |
2131 | */ | |
fac3a43e | 2132 | status = composite->bind(cdev); |
40982be5 DB |
2133 | if (status < 0) |
2134 | goto fail; | |
2135 | ||
37a3a533 AP |
2136 | if (cdev->use_os_string) { |
2137 | status = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
2138 | if (status) | |
2139 | goto fail; | |
2140 | } | |
2141 | ||
7d16e8d3 | 2142 | update_unchanged_dev_desc(&cdev->desc, composite->dev); |
dbb442b8 | 2143 | |
ad1a8102 MN |
2144 | /* has userspace failed to provide a serial number? */ |
2145 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
2146 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 DB |
2147 | |
2148 | INFO(cdev, "%s ready\n", composite->name); | |
2149 | return 0; | |
2150 | ||
2151 | fail: | |
779d516c | 2152 | __composite_unbind(gadget, false); |
40982be5 DB |
2153 | return status; |
2154 | } | |
2155 | ||
2156 | /*-------------------------------------------------------------------------*/ | |
2157 | ||
3a571870 | 2158 | void composite_suspend(struct usb_gadget *gadget) |
40982be5 DB |
2159 | { |
2160 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2161 | struct usb_function *f; | |
2162 | ||
8942939a | 2163 | /* REVISIT: should we have config level |
40982be5 DB |
2164 | * suspend/resume callbacks? |
2165 | */ | |
2166 | DBG(cdev, "suspend\n"); | |
2167 | if (cdev->config) { | |
2168 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2169 | if (f->suspend) | |
2170 | f->suspend(f); | |
2171 | } | |
2172 | } | |
ffe0b335 SAS |
2173 | if (cdev->driver->suspend) |
2174 | cdev->driver->suspend(cdev); | |
f48cf80f FC |
2175 | |
2176 | cdev->suspended = 1; | |
b23f2f94 HW |
2177 | |
2178 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
2179 | } |
2180 | ||
3a571870 | 2181 | void composite_resume(struct usb_gadget *gadget) |
40982be5 DB |
2182 | { |
2183 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2184 | struct usb_function *f; | |
56b1b909 | 2185 | u16 maxpower; |
40982be5 | 2186 | |
8942939a | 2187 | /* REVISIT: should we have config level |
40982be5 DB |
2188 | * suspend/resume callbacks? |
2189 | */ | |
2190 | DBG(cdev, "resume\n"); | |
ffe0b335 SAS |
2191 | if (cdev->driver->resume) |
2192 | cdev->driver->resume(cdev); | |
40982be5 DB |
2193 | if (cdev->config) { |
2194 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2195 | if (f->resume) | |
2196 | f->resume(f); | |
2197 | } | |
b23f2f94 | 2198 | |
8f900a9a | 2199 | maxpower = cdev->config->MaxPower; |
b23f2f94 HW |
2200 | |
2201 | usb_gadget_vbus_draw(gadget, maxpower ? | |
8f900a9a | 2202 | maxpower : CONFIG_USB_GADGET_VBUS_DRAW); |
40982be5 | 2203 | } |
f48cf80f FC |
2204 | |
2205 | cdev->suspended = 0; | |
40982be5 DB |
2206 | } |
2207 | ||
2208 | /*-------------------------------------------------------------------------*/ | |
2209 | ||
ffe0b335 | 2210 | static const struct usb_gadget_driver composite_driver_template = { |
93952956 | 2211 | .bind = composite_bind, |
915c8bef | 2212 | .unbind = composite_unbind, |
40982be5 DB |
2213 | |
2214 | .setup = composite_setup, | |
d8a816fc | 2215 | .reset = composite_disconnect, |
40982be5 DB |
2216 | .disconnect = composite_disconnect, |
2217 | ||
2218 | .suspend = composite_suspend, | |
2219 | .resume = composite_resume, | |
2220 | ||
2221 | .driver = { | |
2222 | .owner = THIS_MODULE, | |
2223 | }, | |
2224 | }; | |
2225 | ||
2226 | /** | |
07a18bd7 | 2227 | * usb_composite_probe() - register a composite driver |
40982be5 | 2228 | * @driver: the driver to register |
43febb27 | 2229 | * |
40982be5 DB |
2230 | * Context: single threaded during gadget setup |
2231 | * | |
2232 | * This function is used to register drivers using the composite driver | |
2233 | * framework. The return value is zero, or a negative errno value. | |
2234 | * Those values normally come from the driver's @bind method, which does | |
2235 | * all the work of setting up the driver to match the hardware. | |
2236 | * | |
2237 | * On successful return, the gadget is ready to respond to requests from | |
2238 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
2239 | * while it was binding. That would usually be done in order to wait for | |
2240 | * some userspace participation. | |
2241 | */ | |
03e42bd5 | 2242 | int usb_composite_probe(struct usb_composite_driver *driver) |
40982be5 | 2243 | { |
ffe0b335 SAS |
2244 | struct usb_gadget_driver *gadget_driver; |
2245 | ||
2246 | if (!driver || !driver->dev || !driver->bind) | |
40982be5 DB |
2247 | return -EINVAL; |
2248 | ||
2249 | if (!driver->name) | |
2250 | driver->name = "composite"; | |
40982be5 | 2251 | |
ffe0b335 SAS |
2252 | driver->gadget_driver = composite_driver_template; |
2253 | gadget_driver = &driver->gadget_driver; | |
2254 | ||
2255 | gadget_driver->function = (char *) driver->name; | |
2256 | gadget_driver->driver.name = driver->name; | |
2257 | gadget_driver->max_speed = driver->max_speed; | |
2258 | ||
2259 | return usb_gadget_probe_driver(gadget_driver); | |
40982be5 | 2260 | } |
721e2e91 | 2261 | EXPORT_SYMBOL_GPL(usb_composite_probe); |
40982be5 DB |
2262 | |
2263 | /** | |
2264 | * usb_composite_unregister() - unregister a composite driver | |
2265 | * @driver: the driver to unregister | |
2266 | * | |
2267 | * This function is used to unregister drivers using the composite | |
2268 | * driver framework. | |
2269 | */ | |
28824b18 | 2270 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 | 2271 | { |
ffe0b335 | 2272 | usb_gadget_unregister_driver(&driver->gadget_driver); |
40982be5 | 2273 | } |
721e2e91 | 2274 | EXPORT_SYMBOL_GPL(usb_composite_unregister); |
1b9ba000 RQ |
2275 | |
2276 | /** | |
2277 | * usb_composite_setup_continue() - Continue with the control transfer | |
2278 | * @cdev: the composite device who's control transfer was kept waiting | |
2279 | * | |
2280 | * This function must be called by the USB function driver to continue | |
2281 | * with the control transfer's data/status stage in case it had requested to | |
2282 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
2283 | * can request the composite framework to delay the setup request's data/status | |
2284 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
2285 | */ | |
2286 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
2287 | { | |
2288 | int value; | |
2289 | struct usb_request *req = cdev->req; | |
2290 | unsigned long flags; | |
2291 | ||
2292 | DBG(cdev, "%s\n", __func__); | |
2293 | spin_lock_irqsave(&cdev->lock, flags); | |
2294 | ||
2295 | if (cdev->delayed_status == 0) { | |
2296 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
2297 | ||
2298 | } else if (--cdev->delayed_status == 0) { | |
2299 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
2300 | req->length = 0; | |
57943716 | 2301 | req->context = cdev; |
a7c12eaf | 2302 | value = composite_ep0_queue(cdev, req, GFP_ATOMIC); |
1b9ba000 RQ |
2303 | if (value < 0) { |
2304 | DBG(cdev, "ep_queue --> %d\n", value); | |
2305 | req->status = 0; | |
2306 | composite_setup_complete(cdev->gadget->ep0, req); | |
2307 | } | |
2308 | } | |
2309 | ||
2310 | spin_unlock_irqrestore(&cdev->lock, flags); | |
2311 | } | |
721e2e91 | 2312 | EXPORT_SYMBOL_GPL(usb_composite_setup_continue); |
1b9ba000 | 2313 | |
cc2683c3 SAS |
2314 | static char *composite_default_mfr(struct usb_gadget *gadget) |
2315 | { | |
2316 | char *mfr; | |
2317 | int len; | |
2318 | ||
2319 | len = snprintf(NULL, 0, "%s %s with %s", init_utsname()->sysname, | |
2320 | init_utsname()->release, gadget->name); | |
2321 | len++; | |
2322 | mfr = kmalloc(len, GFP_KERNEL); | |
2323 | if (!mfr) | |
2324 | return NULL; | |
2325 | snprintf(mfr, len, "%s %s with %s", init_utsname()->sysname, | |
2326 | init_utsname()->release, gadget->name); | |
2327 | return mfr; | |
2328 | } | |
2329 | ||
7d16e8d3 SAS |
2330 | void usb_composite_overwrite_options(struct usb_composite_dev *cdev, |
2331 | struct usb_composite_overwrite *covr) | |
2332 | { | |
2333 | struct usb_device_descriptor *desc = &cdev->desc; | |
1cf0d264 SAS |
2334 | struct usb_gadget_strings *gstr = cdev->driver->strings[0]; |
2335 | struct usb_string *dev_str = gstr->strings; | |
7d16e8d3 SAS |
2336 | |
2337 | if (covr->idVendor) | |
2338 | desc->idVendor = cpu_to_le16(covr->idVendor); | |
2339 | ||
2340 | if (covr->idProduct) | |
2341 | desc->idProduct = cpu_to_le16(covr->idProduct); | |
2342 | ||
2343 | if (covr->bcdDevice) | |
2344 | desc->bcdDevice = cpu_to_le16(covr->bcdDevice); | |
1cf0d264 SAS |
2345 | |
2346 | if (covr->serial_number) { | |
2347 | desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id; | |
2348 | dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number; | |
2349 | } | |
03de9bf6 SAS |
2350 | if (covr->manufacturer) { |
2351 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2352 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer; | |
cc2683c3 SAS |
2353 | |
2354 | } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) { | |
2355 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2356 | cdev->def_manufacturer = composite_default_mfr(cdev->gadget); | |
2357 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer; | |
03de9bf6 | 2358 | } |
2d35ee47 SAS |
2359 | |
2360 | if (covr->product) { | |
2361 | desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id; | |
2362 | dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product; | |
2363 | } | |
7d16e8d3 | 2364 | } |
721e2e91 | 2365 | EXPORT_SYMBOL_GPL(usb_composite_overwrite_options); |
d80c304b SAS |
2366 | |
2367 | MODULE_LICENSE("GPL"); | |
2368 | MODULE_AUTHOR("David Brownell"); |