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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
40982be5 DB |
2 | /* |
3 | * composite.c - infrastructure for Composite USB Gadgets | |
4 | * | |
5 | * Copyright (C) 2006-2008 David Brownell | |
40982be5 DB |
6 | */ |
7 | ||
8 | /* #define VERBOSE_DEBUG */ | |
9 | ||
10 | #include <linux/kallsyms.h> | |
11 | #include <linux/kernel.h> | |
12 | #include <linux/slab.h> | |
6eb0de82 | 13 | #include <linux/module.h> |
40982be5 | 14 | #include <linux/device.h> |
ad1a8102 | 15 | #include <linux/utsname.h> |
40982be5 DB |
16 | |
17 | #include <linux/usb/composite.h> | |
53e6242d | 18 | #include <linux/usb/otg.h> |
bdb64d72 | 19 | #include <asm/unaligned.h> |
40982be5 | 20 | |
37a3a533 AP |
21 | #include "u_os_desc.h" |
22 | ||
19824d5e AP |
23 | /** |
24 | * struct usb_os_string - represents OS String to be reported by a gadget | |
25 | * @bLength: total length of the entire descritor, always 0x12 | |
26 | * @bDescriptorType: USB_DT_STRING | |
27 | * @qwSignature: the OS String proper | |
28 | * @bMS_VendorCode: code used by the host for subsequent requests | |
29 | * @bPad: not used, must be zero | |
30 | */ | |
31 | struct usb_os_string { | |
32 | __u8 bLength; | |
33 | __u8 bDescriptorType; | |
34 | __u8 qwSignature[OS_STRING_QW_SIGN_LEN]; | |
35 | __u8 bMS_VendorCode; | |
36 | __u8 bPad; | |
37 | } __packed; | |
38 | ||
40982be5 DB |
39 | /* |
40 | * The code in this file is utility code, used to build a gadget driver | |
41 | * from one or more "function" drivers, one or more "configuration" | |
42 | * objects, and a "usb_composite_driver" by gluing them together along | |
43 | * with the relevant device-wide data. | |
44 | */ | |
45 | ||
9bb2859f SAS |
46 | static struct usb_gadget_strings **get_containers_gs( |
47 | struct usb_gadget_string_container *uc) | |
48 | { | |
49 | return (struct usb_gadget_strings **)uc->stash; | |
50 | } | |
51 | ||
f3bdbe36 JY |
52 | /** |
53 | * function_descriptors() - get function descriptors for speed | |
54 | * @f: the function | |
55 | * @speed: the speed | |
56 | * | |
57 | * Returns the descriptors or NULL if not set. | |
58 | */ | |
59 | static struct usb_descriptor_header ** | |
60 | function_descriptors(struct usb_function *f, | |
61 | enum usb_device_speed speed) | |
62 | { | |
63 | struct usb_descriptor_header **descriptors; | |
64 | ||
0878263b FB |
65 | /* |
66 | * NOTE: we try to help gadget drivers which might not be setting | |
67 | * max_speed appropriately. | |
68 | */ | |
69 | ||
f3bdbe36 JY |
70 | switch (speed) { |
71 | case USB_SPEED_SUPER_PLUS: | |
72 | descriptors = f->ssp_descriptors; | |
0878263b FB |
73 | if (descriptors) |
74 | break; | |
75 | /* FALLTHROUGH */ | |
f3bdbe36 JY |
76 | case USB_SPEED_SUPER: |
77 | descriptors = f->ss_descriptors; | |
0878263b FB |
78 | if (descriptors) |
79 | break; | |
80 | /* FALLTHROUGH */ | |
f3bdbe36 JY |
81 | case USB_SPEED_HIGH: |
82 | descriptors = f->hs_descriptors; | |
0878263b FB |
83 | if (descriptors) |
84 | break; | |
85 | /* FALLTHROUGH */ | |
f3bdbe36 JY |
86 | default: |
87 | descriptors = f->fs_descriptors; | |
88 | } | |
89 | ||
0878263b FB |
90 | /* |
91 | * if we can't find any descriptors at all, then this gadget deserves to | |
92 | * Oops with a NULL pointer dereference | |
93 | */ | |
94 | ||
f3bdbe36 JY |
95 | return descriptors; |
96 | } | |
97 | ||
48767a4e TB |
98 | /** |
99 | * next_ep_desc() - advance to the next EP descriptor | |
100 | * @t: currect pointer within descriptor array | |
101 | * | |
102 | * Return: next EP descriptor or NULL | |
103 | * | |
104 | * Iterate over @t until either EP descriptor found or | |
105 | * NULL (that indicates end of list) encountered | |
106 | */ | |
107 | static struct usb_descriptor_header** | |
108 | next_ep_desc(struct usb_descriptor_header **t) | |
109 | { | |
110 | for (; *t; t++) { | |
111 | if ((*t)->bDescriptorType == USB_DT_ENDPOINT) | |
112 | return t; | |
113 | } | |
114 | return NULL; | |
115 | } | |
116 | ||
117 | /* | |
118 | * for_each_ep_desc()- iterate over endpoint descriptors in the | |
119 | * descriptors list | |
120 | * @start: pointer within descriptor array. | |
121 | * @ep_desc: endpoint descriptor to use as the loop cursor | |
122 | */ | |
123 | #define for_each_ep_desc(start, ep_desc) \ | |
124 | for (ep_desc = next_ep_desc(start); \ | |
125 | ep_desc; ep_desc = next_ep_desc(ep_desc+1)) | |
126 | ||
127 | /** | |
128 | * config_ep_by_speed() - configures the given endpoint | |
129 | * according to gadget speed. | |
130 | * @g: pointer to the gadget | |
131 | * @f: usb function | |
132 | * @_ep: the endpoint to configure | |
133 | * | |
134 | * Return: error code, 0 on success | |
135 | * | |
136 | * This function chooses the right descriptors for a given | |
137 | * endpoint according to gadget speed and saves it in the | |
138 | * endpoint desc field. If the endpoint already has a descriptor | |
139 | * assigned to it - overwrites it with currently corresponding | |
140 | * descriptor. The endpoint maxpacket field is updated according | |
141 | * to the chosen descriptor. | |
142 | * Note: the supplied function should hold all the descriptors | |
143 | * for supported speeds | |
144 | */ | |
145 | int config_ep_by_speed(struct usb_gadget *g, | |
146 | struct usb_function *f, | |
147 | struct usb_ep *_ep) | |
148 | { | |
149 | struct usb_endpoint_descriptor *chosen_desc = NULL; | |
150 | struct usb_descriptor_header **speed_desc = NULL; | |
151 | ||
bdb64d72 TB |
152 | struct usb_ss_ep_comp_descriptor *comp_desc = NULL; |
153 | int want_comp_desc = 0; | |
154 | ||
48767a4e TB |
155 | struct usb_descriptor_header **d_spd; /* cursor for speed desc */ |
156 | ||
157 | if (!g || !f || !_ep) | |
158 | return -EIO; | |
159 | ||
160 | /* select desired speed */ | |
161 | switch (g->speed) { | |
4eb8e32d JY |
162 | case USB_SPEED_SUPER_PLUS: |
163 | if (gadget_is_superspeed_plus(g)) { | |
164 | speed_desc = f->ssp_descriptors; | |
165 | want_comp_desc = 1; | |
166 | break; | |
167 | } | |
624916a9 | 168 | /* fall through */ |
bdb64d72 TB |
169 | case USB_SPEED_SUPER: |
170 | if (gadget_is_superspeed(g)) { | |
171 | speed_desc = f->ss_descriptors; | |
172 | want_comp_desc = 1; | |
173 | break; | |
174 | } | |
624916a9 | 175 | /* fall through */ |
48767a4e TB |
176 | case USB_SPEED_HIGH: |
177 | if (gadget_is_dualspeed(g)) { | |
178 | speed_desc = f->hs_descriptors; | |
179 | break; | |
180 | } | |
624916a9 | 181 | /* fall through */ |
48767a4e | 182 | default: |
10287bae | 183 | speed_desc = f->fs_descriptors; |
48767a4e TB |
184 | } |
185 | /* find descriptors */ | |
186 | for_each_ep_desc(speed_desc, d_spd) { | |
187 | chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; | |
188 | if (chosen_desc->bEndpointAddress == _ep->address) | |
189 | goto ep_found; | |
190 | } | |
191 | return -EIO; | |
192 | ||
193 | ep_found: | |
194 | /* commit results */ | |
9ad58771 | 195 | _ep->maxpacket = usb_endpoint_maxp(chosen_desc); |
48767a4e | 196 | _ep->desc = chosen_desc; |
bdb64d72 TB |
197 | _ep->comp_desc = NULL; |
198 | _ep->maxburst = 0; | |
eaa496ff FB |
199 | _ep->mult = 1; |
200 | ||
201 | if (g->speed == USB_SPEED_HIGH && (usb_endpoint_xfer_isoc(_ep->desc) || | |
202 | usb_endpoint_xfer_int(_ep->desc))) | |
203 | _ep->mult = usb_endpoint_maxp_mult(_ep->desc); | |
204 | ||
bdb64d72 TB |
205 | if (!want_comp_desc) |
206 | return 0; | |
48767a4e | 207 | |
bdb64d72 TB |
208 | /* |
209 | * Companion descriptor should follow EP descriptor | |
210 | * USB 3.0 spec, #9.6.7 | |
211 | */ | |
212 | comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); | |
213 | if (!comp_desc || | |
214 | (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) | |
215 | return -EIO; | |
216 | _ep->comp_desc = comp_desc; | |
4eb8e32d | 217 | if (g->speed >= USB_SPEED_SUPER) { |
bdb64d72 | 218 | switch (usb_endpoint_type(_ep->desc)) { |
bdb64d72 TB |
219 | case USB_ENDPOINT_XFER_ISOC: |
220 | /* mult: bits 1:0 of bmAttributes */ | |
eaa496ff | 221 | _ep->mult = (comp_desc->bmAttributes & 0x3) + 1; |
624916a9 | 222 | /* fall through */ |
9e878a6b PZ |
223 | case USB_ENDPOINT_XFER_BULK: |
224 | case USB_ENDPOINT_XFER_INT: | |
b785ea7c | 225 | _ep->maxburst = comp_desc->bMaxBurst + 1; |
bdb64d72 TB |
226 | break; |
227 | default: | |
b2fc059f CIK |
228 | if (comp_desc->bMaxBurst != 0) { |
229 | struct usb_composite_dev *cdev; | |
230 | ||
231 | cdev = get_gadget_data(g); | |
b785ea7c | 232 | ERROR(cdev, "ep0 bMaxBurst must be 0\n"); |
b2fc059f | 233 | } |
b785ea7c | 234 | _ep->maxburst = 1; |
bdb64d72 TB |
235 | break; |
236 | } | |
237 | } | |
48767a4e TB |
238 | return 0; |
239 | } | |
721e2e91 | 240 | EXPORT_SYMBOL_GPL(config_ep_by_speed); |
40982be5 DB |
241 | |
242 | /** | |
243 | * usb_add_function() - add a function to a configuration | |
244 | * @config: the configuration | |
245 | * @function: the function being added | |
246 | * Context: single threaded during gadget setup | |
247 | * | |
248 | * After initialization, each configuration must have one or more | |
249 | * functions added to it. Adding a function involves calling its @bind() | |
250 | * method to allocate resources such as interface and string identifiers | |
251 | * and endpoints. | |
252 | * | |
253 | * This function returns the value of the function's bind(), which is | |
254 | * zero for success else a negative errno value. | |
255 | */ | |
28824b18 | 256 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
257 | struct usb_function *function) |
258 | { | |
259 | int value = -EINVAL; | |
260 | ||
261 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
262 | function->name, function, | |
263 | config->label, config); | |
264 | ||
265 | if (!function->set_alt || !function->disable) | |
266 | goto done; | |
267 | ||
268 | function->config = config; | |
269 | list_add_tail(&function->list, &config->functions); | |
270 | ||
d5bb9b81 RB |
271 | if (function->bind_deactivated) { |
272 | value = usb_function_deactivate(function); | |
273 | if (value) | |
274 | goto done; | |
275 | } | |
276 | ||
40982be5 DB |
277 | /* REVISIT *require* function->bind? */ |
278 | if (function->bind) { | |
279 | value = function->bind(config, function); | |
280 | if (value < 0) { | |
281 | list_del(&function->list); | |
282 | function->config = NULL; | |
283 | } | |
284 | } else | |
285 | value = 0; | |
286 | ||
287 | /* We allow configurations that don't work at both speeds. | |
288 | * If we run into a lowspeed Linux system, treat it the same | |
289 | * as full speed ... it's the function drivers that will need | |
290 | * to avoid bulk and ISO transfers. | |
291 | */ | |
10287bae | 292 | if (!config->fullspeed && function->fs_descriptors) |
40982be5 DB |
293 | config->fullspeed = true; |
294 | if (!config->highspeed && function->hs_descriptors) | |
295 | config->highspeed = true; | |
bdb64d72 TB |
296 | if (!config->superspeed && function->ss_descriptors) |
297 | config->superspeed = true; | |
554eead5 JY |
298 | if (!config->superspeed_plus && function->ssp_descriptors) |
299 | config->superspeed_plus = true; | |
40982be5 DB |
300 | |
301 | done: | |
302 | if (value) | |
303 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
304 | function->name, function, value); | |
305 | return value; | |
306 | } | |
721e2e91 | 307 | EXPORT_SYMBOL_GPL(usb_add_function); |
40982be5 | 308 | |
b4735778 SAS |
309 | void usb_remove_function(struct usb_configuration *c, struct usb_function *f) |
310 | { | |
311 | if (f->disable) | |
312 | f->disable(f); | |
313 | ||
314 | bitmap_zero(f->endpoints, 32); | |
315 | list_del(&f->list); | |
316 | if (f->unbind) | |
317 | f->unbind(c, f); | |
0e3e9752 FB |
318 | |
319 | if (f->bind_deactivated) | |
320 | usb_function_activate(f); | |
b4735778 SAS |
321 | } |
322 | EXPORT_SYMBOL_GPL(usb_remove_function); | |
323 | ||
60beed95 DB |
324 | /** |
325 | * usb_function_deactivate - prevent function and gadget enumeration | |
326 | * @function: the function that isn't yet ready to respond | |
327 | * | |
328 | * Blocks response of the gadget driver to host enumeration by | |
329 | * preventing the data line pullup from being activated. This is | |
330 | * normally called during @bind() processing to change from the | |
331 | * initial "ready to respond" state, or when a required resource | |
332 | * becomes available. | |
333 | * | |
334 | * For example, drivers that serve as a passthrough to a userspace | |
335 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
336 | * MTP, or print server) is ready to handle host requests. | |
337 | * | |
338 | * Not all systems support software control of their USB peripheral | |
339 | * data pullups. | |
340 | * | |
341 | * Returns zero on success, else negative errno. | |
342 | */ | |
343 | int usb_function_deactivate(struct usb_function *function) | |
344 | { | |
345 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 346 | unsigned long flags; |
60beed95 DB |
347 | int status = 0; |
348 | ||
b2bdf3a7 | 349 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
350 | |
351 | if (cdev->deactivations == 0) | |
5601250b | 352 | status = usb_gadget_deactivate(cdev->gadget); |
60beed95 DB |
353 | if (status == 0) |
354 | cdev->deactivations++; | |
355 | ||
b2bdf3a7 | 356 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
357 | return status; |
358 | } | |
721e2e91 | 359 | EXPORT_SYMBOL_GPL(usb_function_deactivate); |
60beed95 DB |
360 | |
361 | /** | |
362 | * usb_function_activate - allow function and gadget enumeration | |
363 | * @function: function on which usb_function_activate() was called | |
364 | * | |
365 | * Reverses effect of usb_function_deactivate(). If no more functions | |
366 | * are delaying their activation, the gadget driver will respond to | |
367 | * host enumeration procedures. | |
368 | * | |
369 | * Returns zero on success, else negative errno. | |
370 | */ | |
371 | int usb_function_activate(struct usb_function *function) | |
372 | { | |
373 | struct usb_composite_dev *cdev = function->config->cdev; | |
4fefe9f6 | 374 | unsigned long flags; |
60beed95 DB |
375 | int status = 0; |
376 | ||
4fefe9f6 | 377 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
378 | |
379 | if (WARN_ON(cdev->deactivations == 0)) | |
380 | status = -EINVAL; | |
381 | else { | |
382 | cdev->deactivations--; | |
383 | if (cdev->deactivations == 0) | |
5601250b | 384 | status = usb_gadget_activate(cdev->gadget); |
60beed95 DB |
385 | } |
386 | ||
4fefe9f6 | 387 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
388 | return status; |
389 | } | |
721e2e91 | 390 | EXPORT_SYMBOL_GPL(usb_function_activate); |
60beed95 | 391 | |
40982be5 DB |
392 | /** |
393 | * usb_interface_id() - allocate an unused interface ID | |
394 | * @config: configuration associated with the interface | |
395 | * @function: function handling the interface | |
396 | * Context: single threaded during gadget setup | |
397 | * | |
398 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
399 | * allocate new interface IDs. The function driver will then store that | |
400 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 401 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
402 | * particularly changing its altsetting via set_alt(). There may |
403 | * also be class-specific or vendor-specific requests to handle. | |
404 | * | |
405 | * All interface identifier should be allocated using this routine, to | |
406 | * ensure that for example different functions don't wrongly assign | |
407 | * different meanings to the same identifier. Note that since interface | |
25985edc | 408 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
409 | * one configuration (or more than once in a given configuration) need |
410 | * multiple versions of the relevant descriptors. | |
411 | * | |
412 | * Returns the interface ID which was allocated; or -ENODEV if no | |
413 | * more interface IDs can be allocated. | |
414 | */ | |
28824b18 | 415 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
416 | struct usb_function *function) |
417 | { | |
418 | unsigned id = config->next_interface_id; | |
419 | ||
420 | if (id < MAX_CONFIG_INTERFACES) { | |
421 | config->interface[id] = function; | |
422 | config->next_interface_id = id + 1; | |
423 | return id; | |
424 | } | |
425 | return -ENODEV; | |
426 | } | |
721e2e91 | 427 | EXPORT_SYMBOL_GPL(usb_interface_id); |
40982be5 | 428 | |
8f900a9a SAS |
429 | static u8 encode_bMaxPower(enum usb_device_speed speed, |
430 | struct usb_configuration *c) | |
431 | { | |
432 | unsigned val; | |
433 | ||
434 | if (c->MaxPower) | |
435 | val = c->MaxPower; | |
436 | else | |
437 | val = CONFIG_USB_GADGET_VBUS_DRAW; | |
438 | if (!val) | |
439 | return 0; | |
440 | switch (speed) { | |
441 | case USB_SPEED_SUPER: | |
442 | return DIV_ROUND_UP(val, 8); | |
443 | default: | |
444 | return DIV_ROUND_UP(val, 2); | |
2b84f92b | 445 | } |
8f900a9a SAS |
446 | } |
447 | ||
40982be5 DB |
448 | static int config_buf(struct usb_configuration *config, |
449 | enum usb_device_speed speed, void *buf, u8 type) | |
450 | { | |
451 | struct usb_config_descriptor *c = buf; | |
452 | void *next = buf + USB_DT_CONFIG_SIZE; | |
e13f17ff | 453 | int len; |
40982be5 DB |
454 | struct usb_function *f; |
455 | int status; | |
456 | ||
e13f17ff | 457 | len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE; |
40982be5 DB |
458 | /* write the config descriptor */ |
459 | c = buf; | |
460 | c->bLength = USB_DT_CONFIG_SIZE; | |
461 | c->bDescriptorType = type; | |
462 | /* wTotalLength is written later */ | |
463 | c->bNumInterfaces = config->next_interface_id; | |
464 | c->bConfigurationValue = config->bConfigurationValue; | |
465 | c->iConfiguration = config->iConfiguration; | |
466 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
8f900a9a | 467 | c->bMaxPower = encode_bMaxPower(speed, config); |
40982be5 DB |
468 | |
469 | /* There may be e.g. OTG descriptors */ | |
470 | if (config->descriptors) { | |
471 | status = usb_descriptor_fillbuf(next, len, | |
472 | config->descriptors); | |
473 | if (status < 0) | |
474 | return status; | |
475 | len -= status; | |
476 | next += status; | |
477 | } | |
478 | ||
479 | /* add each function's descriptors */ | |
480 | list_for_each_entry(f, &config->functions, list) { | |
481 | struct usb_descriptor_header **descriptors; | |
482 | ||
f3bdbe36 | 483 | descriptors = function_descriptors(f, speed); |
40982be5 DB |
484 | if (!descriptors) |
485 | continue; | |
486 | status = usb_descriptor_fillbuf(next, len, | |
487 | (const struct usb_descriptor_header **) descriptors); | |
488 | if (status < 0) | |
489 | return status; | |
490 | len -= status; | |
491 | next += status; | |
492 | } | |
493 | ||
494 | len = next - buf; | |
495 | c->wTotalLength = cpu_to_le16(len); | |
496 | return len; | |
497 | } | |
498 | ||
499 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
500 | { | |
501 | struct usb_gadget *gadget = cdev->gadget; | |
502 | struct usb_configuration *c; | |
37a3a533 | 503 | struct list_head *pos; |
40982be5 DB |
504 | u8 type = w_value >> 8; |
505 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
506 | ||
eae5820b | 507 | if (gadget->speed >= USB_SPEED_SUPER) |
bdb64d72 TB |
508 | speed = gadget->speed; |
509 | else if (gadget_is_dualspeed(gadget)) { | |
510 | int hs = 0; | |
40982be5 DB |
511 | if (gadget->speed == USB_SPEED_HIGH) |
512 | hs = 1; | |
513 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
514 | hs = !hs; | |
515 | if (hs) | |
516 | speed = USB_SPEED_HIGH; | |
517 | ||
518 | } | |
519 | ||
520 | /* This is a lookup by config *INDEX* */ | |
521 | w_value &= 0xff; | |
37a3a533 AP |
522 | |
523 | pos = &cdev->configs; | |
524 | c = cdev->os_desc_config; | |
525 | if (c) | |
526 | goto check_config; | |
527 | ||
528 | while ((pos = pos->next) != &cdev->configs) { | |
529 | c = list_entry(pos, typeof(*c), list); | |
530 | ||
531 | /* skip OS Descriptors config which is handled separately */ | |
532 | if (c == cdev->os_desc_config) | |
533 | continue; | |
534 | ||
535 | check_config: | |
40982be5 | 536 | /* ignore configs that won't work at this speed */ |
bdb64d72 | 537 | switch (speed) { |
eae5820b JY |
538 | case USB_SPEED_SUPER_PLUS: |
539 | if (!c->superspeed_plus) | |
540 | continue; | |
541 | break; | |
bdb64d72 TB |
542 | case USB_SPEED_SUPER: |
543 | if (!c->superspeed) | |
544 | continue; | |
545 | break; | |
546 | case USB_SPEED_HIGH: | |
40982be5 DB |
547 | if (!c->highspeed) |
548 | continue; | |
bdb64d72 TB |
549 | break; |
550 | default: | |
40982be5 DB |
551 | if (!c->fullspeed) |
552 | continue; | |
553 | } | |
bdb64d72 | 554 | |
40982be5 DB |
555 | if (w_value == 0) |
556 | return config_buf(c, speed, cdev->req->buf, type); | |
557 | w_value--; | |
558 | } | |
559 | return -EINVAL; | |
560 | } | |
561 | ||
562 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
563 | { | |
564 | struct usb_gadget *gadget = cdev->gadget; | |
565 | struct usb_configuration *c; | |
566 | unsigned count = 0; | |
567 | int hs = 0; | |
bdb64d72 | 568 | int ss = 0; |
a4afd012 | 569 | int ssp = 0; |
40982be5 DB |
570 | |
571 | if (gadget_is_dualspeed(gadget)) { | |
572 | if (gadget->speed == USB_SPEED_HIGH) | |
573 | hs = 1; | |
bdb64d72 TB |
574 | if (gadget->speed == USB_SPEED_SUPER) |
575 | ss = 1; | |
a4afd012 JY |
576 | if (gadget->speed == USB_SPEED_SUPER_PLUS) |
577 | ssp = 1; | |
40982be5 DB |
578 | if (type == USB_DT_DEVICE_QUALIFIER) |
579 | hs = !hs; | |
580 | } | |
581 | list_for_each_entry(c, &cdev->configs, list) { | |
582 | /* ignore configs that won't work at this speed */ | |
a4afd012 JY |
583 | if (ssp) { |
584 | if (!c->superspeed_plus) | |
585 | continue; | |
586 | } else if (ss) { | |
bdb64d72 TB |
587 | if (!c->superspeed) |
588 | continue; | |
589 | } else if (hs) { | |
40982be5 DB |
590 | if (!c->highspeed) |
591 | continue; | |
592 | } else { | |
593 | if (!c->fullspeed) | |
594 | continue; | |
595 | } | |
596 | count++; | |
597 | } | |
598 | return count; | |
599 | } | |
600 | ||
bdb64d72 TB |
601 | /** |
602 | * bos_desc() - prepares the BOS descriptor. | |
603 | * @cdev: pointer to usb_composite device to generate the bos | |
604 | * descriptor for | |
605 | * | |
606 | * This function generates the BOS (Binary Device Object) | |
607 | * descriptor and its device capabilities descriptors. The BOS | |
608 | * descriptor should be supported by a SuperSpeed device. | |
609 | */ | |
610 | static int bos_desc(struct usb_composite_dev *cdev) | |
611 | { | |
612 | struct usb_ext_cap_descriptor *usb_ext; | |
bdb64d72 TB |
613 | struct usb_dcd_config_params dcd_config_params; |
614 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
615 | ||
616 | bos->bLength = USB_DT_BOS_SIZE; | |
617 | bos->bDescriptorType = USB_DT_BOS; | |
618 | ||
619 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
620 | bos->bNumDeviceCaps = 0; | |
621 | ||
622 | /* | |
623 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
624 | * and shall support LPM when operating in USB2.0 HS mode. | |
625 | */ | |
626 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
627 | bos->bNumDeviceCaps++; | |
628 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
629 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
630 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
631 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
a6615937 | 632 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT | USB_BESL_SUPPORT); |
bdb64d72 TB |
633 | |
634 | /* | |
635 | * The Superspeed USB Capability descriptor shall be implemented by all | |
636 | * SuperSpeed devices. | |
637 | */ | |
0b67a6be JY |
638 | if (gadget_is_superspeed(cdev->gadget)) { |
639 | struct usb_ss_cap_descriptor *ss_cap; | |
640 | ||
641 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
642 | bos->bNumDeviceCaps++; | |
643 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
644 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
645 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
646 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
647 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
648 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
649 | USB_FULL_SPEED_OPERATION | | |
650 | USB_HIGH_SPEED_OPERATION | | |
651 | USB_5GBPS_OPERATION); | |
652 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
653 | ||
654 | /* Get Controller configuration */ | |
655 | if (cdev->gadget->ops->get_config_params) { | |
656 | cdev->gadget->ops->get_config_params( | |
657 | &dcd_config_params); | |
658 | } else { | |
659 | dcd_config_params.bU1devExitLat = | |
660 | USB_DEFAULT_U1_DEV_EXIT_LAT; | |
661 | dcd_config_params.bU2DevExitLat = | |
662 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); | |
663 | } | |
664 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
665 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
bdb64d72 | 666 | } |
bdb64d72 | 667 | |
f228a8de JY |
668 | /* The SuperSpeedPlus USB Device Capability descriptor */ |
669 | if (gadget_is_superspeed_plus(cdev->gadget)) { | |
670 | struct usb_ssp_cap_descriptor *ssp_cap; | |
671 | ||
672 | ssp_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
673 | bos->bNumDeviceCaps++; | |
674 | ||
675 | /* | |
676 | * Report typical values. | |
677 | */ | |
678 | ||
679 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SSP_CAP_SIZE(1)); | |
680 | ssp_cap->bLength = USB_DT_USB_SSP_CAP_SIZE(1); | |
681 | ssp_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
682 | ssp_cap->bDevCapabilityType = USB_SSP_CAP_TYPE; | |
138b8638 JY |
683 | ssp_cap->bReserved = 0; |
684 | ssp_cap->wReserved = 0; | |
f228a8de JY |
685 | |
686 | /* SSAC = 1 (2 attributes) */ | |
687 | ssp_cap->bmAttributes = cpu_to_le32(1); | |
688 | ||
689 | /* Min RX/TX Lane Count = 1 */ | |
08f8cabf JY |
690 | ssp_cap->wFunctionalitySupport = |
691 | cpu_to_le16((1 << 8) | (1 << 12)); | |
f228a8de JY |
692 | |
693 | /* | |
694 | * bmSublinkSpeedAttr[0]: | |
695 | * ST = Symmetric, RX | |
696 | * LSE = 3 (Gbps) | |
697 | * LP = 1 (SuperSpeedPlus) | |
698 | * LSM = 10 (10 Gbps) | |
699 | */ | |
700 | ssp_cap->bmSublinkSpeedAttr[0] = | |
08f8cabf | 701 | cpu_to_le32((3 << 4) | (1 << 14) | (0xa << 16)); |
f228a8de JY |
702 | /* |
703 | * bmSublinkSpeedAttr[1] = | |
704 | * ST = Symmetric, TX | |
705 | * LSE = 3 (Gbps) | |
706 | * LP = 1 (SuperSpeedPlus) | |
707 | * LSM = 10 (10 Gbps) | |
708 | */ | |
709 | ssp_cap->bmSublinkSpeedAttr[1] = | |
08f8cabf JY |
710 | cpu_to_le32((3 << 4) | (1 << 14) | |
711 | (0xa << 16) | (1 << 7)); | |
f228a8de JY |
712 | } |
713 | ||
bdb64d72 TB |
714 | return le16_to_cpu(bos->wTotalLength); |
715 | } | |
716 | ||
40982be5 DB |
717 | static void device_qual(struct usb_composite_dev *cdev) |
718 | { | |
719 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
720 | ||
721 | qual->bLength = sizeof(*qual); | |
722 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
723 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
724 | qual->bcdUSB = cdev->desc.bcdUSB; | |
725 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
726 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
727 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
728 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 729 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 730 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 731 | qual->bRESERVED = 0; |
40982be5 DB |
732 | } |
733 | ||
734 | /*-------------------------------------------------------------------------*/ | |
735 | ||
736 | static void reset_config(struct usb_composite_dev *cdev) | |
737 | { | |
738 | struct usb_function *f; | |
739 | ||
740 | DBG(cdev, "reset config\n"); | |
741 | ||
742 | list_for_each_entry(f, &cdev->config->functions, list) { | |
743 | if (f->disable) | |
744 | f->disable(f); | |
5242658d LP |
745 | |
746 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
747 | } |
748 | cdev->config = NULL; | |
2bac51a1 | 749 | cdev->delayed_status = 0; |
40982be5 DB |
750 | } |
751 | ||
752 | static int set_config(struct usb_composite_dev *cdev, | |
753 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
754 | { | |
755 | struct usb_gadget *gadget = cdev->gadget; | |
756 | struct usb_configuration *c = NULL; | |
757 | int result = -EINVAL; | |
758 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
759 | int tmp; | |
760 | ||
40982be5 DB |
761 | if (number) { |
762 | list_for_each_entry(c, &cdev->configs, list) { | |
763 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
764 | /* |
765 | * We disable the FDs of the previous | |
766 | * configuration only if the new configuration | |
767 | * is a valid one | |
768 | */ | |
769 | if (cdev->config) | |
770 | reset_config(cdev); | |
40982be5 DB |
771 | result = 0; |
772 | break; | |
773 | } | |
774 | } | |
775 | if (result < 0) | |
776 | goto done; | |
bdb64d72 TB |
777 | } else { /* Zero configuration value - need to reset the config */ |
778 | if (cdev->config) | |
779 | reset_config(cdev); | |
40982be5 | 780 | result = 0; |
bdb64d72 | 781 | } |
40982be5 | 782 | |
e538dfda MN |
783 | INFO(cdev, "%s config #%d: %s\n", |
784 | usb_speed_string(gadget->speed), | |
785 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
786 | |
787 | if (!c) | |
788 | goto done; | |
789 | ||
6027f317 | 790 | usb_gadget_set_state(gadget, USB_STATE_CONFIGURED); |
40982be5 DB |
791 | cdev->config = c; |
792 | ||
793 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
794 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
795 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 796 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
797 | |
798 | if (!f) | |
799 | break; | |
800 | ||
5242658d LP |
801 | /* |
802 | * Record which endpoints are used by the function. This is used | |
803 | * to dispatch control requests targeted at that endpoint to the | |
804 | * function's setup callback instead of the current | |
805 | * configuration's setup callback. | |
806 | */ | |
f3bdbe36 | 807 | descriptors = function_descriptors(f, gadget->speed); |
5242658d LP |
808 | |
809 | for (; *descriptors; ++descriptors) { | |
810 | struct usb_endpoint_descriptor *ep; | |
811 | int addr; | |
812 | ||
813 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
814 | continue; | |
815 | ||
816 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
817 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
818 | | (ep->bEndpointAddress & 0x0f); | |
819 | set_bit(addr, f->endpoints); | |
820 | } | |
821 | ||
40982be5 DB |
822 | result = f->set_alt(f, tmp, 0); |
823 | if (result < 0) { | |
824 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
825 | tmp, f->name, f, result); | |
826 | ||
827 | reset_config(cdev); | |
828 | goto done; | |
829 | } | |
1b9ba000 RQ |
830 | |
831 | if (result == USB_GADGET_DELAYED_STATUS) { | |
832 | DBG(cdev, | |
833 | "%s: interface %d (%s) requested delayed status\n", | |
834 | __func__, tmp, f->name); | |
835 | cdev->delayed_status++; | |
836 | DBG(cdev, "delayed_status count %d\n", | |
837 | cdev->delayed_status); | |
838 | } | |
40982be5 DB |
839 | } |
840 | ||
841 | /* when we return, be sure our power usage is valid */ | |
8f900a9a | 842 | power = c->MaxPower ? c->MaxPower : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
843 | done: |
844 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
845 | if (result >= 0 && cdev->delayed_status) |
846 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
847 | return result; |
848 | } | |
849 | ||
de53c254 SAS |
850 | int usb_add_config_only(struct usb_composite_dev *cdev, |
851 | struct usb_configuration *config) | |
852 | { | |
853 | struct usb_configuration *c; | |
854 | ||
855 | if (!config->bConfigurationValue) | |
856 | return -EINVAL; | |
857 | ||
858 | /* Prevent duplicate configuration identifiers */ | |
859 | list_for_each_entry(c, &cdev->configs, list) { | |
860 | if (c->bConfigurationValue == config->bConfigurationValue) | |
861 | return -EBUSY; | |
862 | } | |
863 | ||
864 | config->cdev = cdev; | |
865 | list_add_tail(&config->list, &cdev->configs); | |
866 | ||
867 | INIT_LIST_HEAD(&config->functions); | |
868 | config->next_interface_id = 0; | |
869 | memset(config->interface, 0, sizeof(config->interface)); | |
870 | ||
871 | return 0; | |
872 | } | |
873 | EXPORT_SYMBOL_GPL(usb_add_config_only); | |
874 | ||
40982be5 DB |
875 | /** |
876 | * usb_add_config() - add a configuration to a device. | |
877 | * @cdev: wraps the USB gadget | |
878 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 879 | * @bind: the configuration's bind function |
40982be5 DB |
880 | * Context: single threaded during gadget setup |
881 | * | |
c9bfff9c | 882 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
883 | * add each of the configurations it supports, using this routine. |
884 | * | |
c9bfff9c | 885 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
886 | * is zero for success else a negative errno value. Binding configurations |
887 | * assigns global resources including string IDs, and per-configuration | |
888 | * resources such as interface IDs and endpoints. | |
889 | */ | |
28824b18 | 890 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
891 | struct usb_configuration *config, |
892 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
893 | { |
894 | int status = -EINVAL; | |
de53c254 SAS |
895 | |
896 | if (!bind) | |
897 | goto done; | |
40982be5 DB |
898 | |
899 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
900 | config->bConfigurationValue, | |
901 | config->label, config); | |
902 | ||
de53c254 SAS |
903 | status = usb_add_config_only(cdev, config); |
904 | if (status) | |
40982be5 DB |
905 | goto done; |
906 | ||
c9bfff9c | 907 | status = bind(config); |
40982be5 | 908 | if (status < 0) { |
124ef389 YO |
909 | while (!list_empty(&config->functions)) { |
910 | struct usb_function *f; | |
911 | ||
912 | f = list_first_entry(&config->functions, | |
913 | struct usb_function, list); | |
914 | list_del(&f->list); | |
915 | if (f->unbind) { | |
916 | DBG(cdev, "unbind function '%s'/%p\n", | |
917 | f->name, f); | |
918 | f->unbind(config, f); | |
919 | /* may free memory for "f" */ | |
920 | } | |
921 | } | |
40982be5 DB |
922 | list_del(&config->list); |
923 | config->cdev = NULL; | |
924 | } else { | |
925 | unsigned i; | |
926 | ||
cd69cbeb | 927 | DBG(cdev, "cfg %d/%p speeds:%s%s%s%s\n", |
40982be5 | 928 | config->bConfigurationValue, config, |
cd69cbeb | 929 | config->superspeed_plus ? " superplus" : "", |
bdb64d72 | 930 | config->superspeed ? " super" : "", |
40982be5 DB |
931 | config->highspeed ? " high" : "", |
932 | config->fullspeed | |
933 | ? (gadget_is_dualspeed(cdev->gadget) | |
934 | ? " full" | |
935 | : " full/low") | |
936 | : ""); | |
937 | ||
938 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
939 | struct usb_function *f = config->interface[i]; | |
940 | ||
941 | if (!f) | |
942 | continue; | |
943 | DBG(cdev, " interface %d = %s/%p\n", | |
944 | i, f->name, f); | |
945 | } | |
946 | } | |
947 | ||
f871cb9b | 948 | /* set_alt(), or next bind(), sets up ep->claimed as needed */ |
40982be5 DB |
949 | usb_ep_autoconfig_reset(cdev->gadget); |
950 | ||
951 | done: | |
952 | if (status) | |
953 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
954 | config->bConfigurationValue, status); | |
955 | return status; | |
956 | } | |
721e2e91 | 957 | EXPORT_SYMBOL_GPL(usb_add_config); |
40982be5 | 958 | |
51cce6fc BG |
959 | static void remove_config(struct usb_composite_dev *cdev, |
960 | struct usb_configuration *config) | |
961 | { | |
962 | while (!list_empty(&config->functions)) { | |
963 | struct usb_function *f; | |
964 | ||
965 | f = list_first_entry(&config->functions, | |
966 | struct usb_function, list); | |
0e3e9752 FB |
967 | |
968 | usb_remove_function(config, f); | |
51cce6fc BG |
969 | } |
970 | list_del(&config->list); | |
971 | if (config->unbind) { | |
972 | DBG(cdev, "unbind config '%s'/%p\n", config->label, config); | |
973 | config->unbind(config); | |
974 | /* may free memory for "c" */ | |
975 | } | |
976 | } | |
977 | ||
978 | /** | |
979 | * usb_remove_config() - remove a configuration from a device. | |
980 | * @cdev: wraps the USB gadget | |
981 | * @config: the configuration | |
982 | * | |
983 | * Drivers must call usb_gadget_disconnect before calling this function | |
984 | * to disconnect the device from the host and make sure the host will not | |
985 | * try to enumerate the device while we are changing the config list. | |
986 | */ | |
987 | void usb_remove_config(struct usb_composite_dev *cdev, | |
988 | struct usb_configuration *config) | |
989 | { | |
990 | unsigned long flags; | |
991 | ||
992 | spin_lock_irqsave(&cdev->lock, flags); | |
993 | ||
994 | if (cdev->config == config) | |
995 | reset_config(cdev); | |
996 | ||
997 | spin_unlock_irqrestore(&cdev->lock, flags); | |
998 | ||
999 | remove_config(cdev, config); | |
1000 | } | |
1001 | ||
40982be5 DB |
1002 | /*-------------------------------------------------------------------------*/ |
1003 | ||
1004 | /* We support strings in multiple languages ... string descriptor zero | |
1005 | * says which languages are supported. The typical case will be that | |
ad4676ab | 1006 | * only one language (probably English) is used, with i18n handled on |
40982be5 DB |
1007 | * the host side. |
1008 | */ | |
1009 | ||
1010 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
1011 | { | |
1012 | const struct usb_gadget_strings *s; | |
20c5e74c | 1013 | __le16 language; |
40982be5 DB |
1014 | __le16 *tmp; |
1015 | ||
1016 | while (*sp) { | |
1017 | s = *sp; | |
1018 | language = cpu_to_le16(s->language); | |
1019 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
1020 | if (*tmp == language) | |
1021 | goto repeat; | |
1022 | } | |
1023 | *tmp++ = language; | |
1024 | repeat: | |
1025 | sp++; | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | static int lookup_string( | |
1030 | struct usb_gadget_strings **sp, | |
1031 | void *buf, | |
1032 | u16 language, | |
1033 | int id | |
1034 | ) | |
1035 | { | |
1036 | struct usb_gadget_strings *s; | |
1037 | int value; | |
1038 | ||
1039 | while (*sp) { | |
1040 | s = *sp++; | |
1041 | if (s->language != language) | |
1042 | continue; | |
1043 | value = usb_gadget_get_string(s, id, buf); | |
1044 | if (value > 0) | |
1045 | return value; | |
1046 | } | |
1047 | return -EINVAL; | |
1048 | } | |
1049 | ||
1050 | static int get_string(struct usb_composite_dev *cdev, | |
1051 | void *buf, u16 language, int id) | |
1052 | { | |
ffe0b335 | 1053 | struct usb_composite_driver *composite = cdev->driver; |
9bb2859f | 1054 | struct usb_gadget_string_container *uc; |
40982be5 DB |
1055 | struct usb_configuration *c; |
1056 | struct usb_function *f; | |
1057 | int len; | |
1058 | ||
ad4676ab | 1059 | /* Yes, not only is USB's i18n support probably more than most |
40982be5 DB |
1060 | * folk will ever care about ... also, it's all supported here. |
1061 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
1062 | */ | |
1063 | ||
1064 | /* 0 == report all available language codes */ | |
1065 | if (id == 0) { | |
1066 | struct usb_string_descriptor *s = buf; | |
1067 | struct usb_gadget_strings **sp; | |
1068 | ||
1069 | memset(s, 0, 256); | |
1070 | s->bDescriptorType = USB_DT_STRING; | |
1071 | ||
1072 | sp = composite->strings; | |
1073 | if (sp) | |
1074 | collect_langs(sp, s->wData); | |
1075 | ||
1076 | list_for_each_entry(c, &cdev->configs, list) { | |
1077 | sp = c->strings; | |
1078 | if (sp) | |
1079 | collect_langs(sp, s->wData); | |
1080 | ||
1081 | list_for_each_entry(f, &c->functions, list) { | |
1082 | sp = f->strings; | |
1083 | if (sp) | |
1084 | collect_langs(sp, s->wData); | |
1085 | } | |
1086 | } | |
27a46633 SAS |
1087 | list_for_each_entry(uc, &cdev->gstrings, list) { |
1088 | struct usb_gadget_strings **sp; | |
1089 | ||
1090 | sp = get_containers_gs(uc); | |
1091 | collect_langs(sp, s->wData); | |
1092 | } | |
40982be5 | 1093 | |
417b57b3 | 1094 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
1095 | continue; |
1096 | if (!len) | |
1097 | return -EINVAL; | |
1098 | ||
1099 | s->bLength = 2 * (len + 1); | |
1100 | return s->bLength; | |
1101 | } | |
1102 | ||
19824d5e AP |
1103 | if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) { |
1104 | struct usb_os_string *b = buf; | |
1105 | b->bLength = sizeof(*b); | |
1106 | b->bDescriptorType = USB_DT_STRING; | |
1107 | compiletime_assert( | |
1108 | sizeof(b->qwSignature) == sizeof(cdev->qw_sign), | |
1109 | "qwSignature size must be equal to qw_sign"); | |
1110 | memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature)); | |
1111 | b->bMS_VendorCode = cdev->b_vendor_code; | |
1112 | b->bPad = 0; | |
1113 | return sizeof(*b); | |
1114 | } | |
1115 | ||
9bb2859f SAS |
1116 | list_for_each_entry(uc, &cdev->gstrings, list) { |
1117 | struct usb_gadget_strings **sp; | |
1118 | ||
1119 | sp = get_containers_gs(uc); | |
1120 | len = lookup_string(sp, buf, language, id); | |
1121 | if (len > 0) | |
1122 | return len; | |
1123 | } | |
1124 | ||
ad1a8102 MN |
1125 | /* String IDs are device-scoped, so we look up each string |
1126 | * table we're told about. These lookups are infrequent; | |
1127 | * simpler-is-better here. | |
40982be5 DB |
1128 | */ |
1129 | if (composite->strings) { | |
1130 | len = lookup_string(composite->strings, buf, language, id); | |
1131 | if (len > 0) | |
1132 | return len; | |
1133 | } | |
1134 | list_for_each_entry(c, &cdev->configs, list) { | |
1135 | if (c->strings) { | |
1136 | len = lookup_string(c->strings, buf, language, id); | |
1137 | if (len > 0) | |
1138 | return len; | |
1139 | } | |
1140 | list_for_each_entry(f, &c->functions, list) { | |
1141 | if (!f->strings) | |
1142 | continue; | |
1143 | len = lookup_string(f->strings, buf, language, id); | |
1144 | if (len > 0) | |
1145 | return len; | |
1146 | } | |
1147 | } | |
1148 | return -EINVAL; | |
1149 | } | |
1150 | ||
1151 | /** | |
1152 | * usb_string_id() - allocate an unused string ID | |
1153 | * @cdev: the device whose string descriptor IDs are being allocated | |
1154 | * Context: single threaded during gadget setup | |
1155 | * | |
1156 | * @usb_string_id() is called from bind() callbacks to allocate | |
1157 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1158 | * then store that ID in the appropriate descriptors and string table. | |
1159 | * | |
f2adc4f8 MN |
1160 | * All string identifier should be allocated using this, |
1161 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
1162 | * that for example different functions don't wrongly assign different | |
1163 | * meanings to the same identifier. | |
40982be5 | 1164 | */ |
28824b18 | 1165 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
1166 | { |
1167 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
1168 | /* string id 0 is reserved by USB spec for list of |
1169 | * supported languages */ | |
1170 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
1171 | cdev->next_string_id++; |
1172 | return cdev->next_string_id; | |
1173 | } | |
1174 | return -ENODEV; | |
1175 | } | |
721e2e91 | 1176 | EXPORT_SYMBOL_GPL(usb_string_id); |
40982be5 | 1177 | |
f2adc4f8 MN |
1178 | /** |
1179 | * usb_string_ids() - allocate unused string IDs in batch | |
1180 | * @cdev: the device whose string descriptor IDs are being allocated | |
1181 | * @str: an array of usb_string objects to assign numbers to | |
1182 | * Context: single threaded during gadget setup | |
1183 | * | |
1184 | * @usb_string_ids() is called from bind() callbacks to allocate | |
1185 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1186 | * then copy IDs from the string table to the appropriate descriptors | |
1187 | * and string table for other languages. | |
1188 | * | |
1189 | * All string identifier should be allocated using this, | |
1190 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1191 | * example different functions don't wrongly assign different meanings | |
1192 | * to the same identifier. | |
1193 | */ | |
1194 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
1195 | { | |
1196 | int next = cdev->next_string_id; | |
1197 | ||
1198 | for (; str->s; ++str) { | |
1199 | if (unlikely(next >= 254)) | |
1200 | return -ENODEV; | |
1201 | str->id = ++next; | |
1202 | } | |
1203 | ||
1204 | cdev->next_string_id = next; | |
1205 | ||
1206 | return 0; | |
1207 | } | |
721e2e91 | 1208 | EXPORT_SYMBOL_GPL(usb_string_ids_tab); |
f2adc4f8 | 1209 | |
9bb2859f SAS |
1210 | static struct usb_gadget_string_container *copy_gadget_strings( |
1211 | struct usb_gadget_strings **sp, unsigned n_gstrings, | |
1212 | unsigned n_strings) | |
1213 | { | |
1214 | struct usb_gadget_string_container *uc; | |
1215 | struct usb_gadget_strings **gs_array; | |
1216 | struct usb_gadget_strings *gs; | |
1217 | struct usb_string *s; | |
1218 | unsigned mem; | |
1219 | unsigned n_gs; | |
1220 | unsigned n_s; | |
1221 | void *stash; | |
1222 | ||
1223 | mem = sizeof(*uc); | |
1224 | mem += sizeof(void *) * (n_gstrings + 1); | |
1225 | mem += sizeof(struct usb_gadget_strings) * n_gstrings; | |
1226 | mem += sizeof(struct usb_string) * (n_strings + 1) * (n_gstrings); | |
1227 | uc = kmalloc(mem, GFP_KERNEL); | |
1228 | if (!uc) | |
1229 | return ERR_PTR(-ENOMEM); | |
1230 | gs_array = get_containers_gs(uc); | |
1231 | stash = uc->stash; | |
1232 | stash += sizeof(void *) * (n_gstrings + 1); | |
1233 | for (n_gs = 0; n_gs < n_gstrings; n_gs++) { | |
1234 | struct usb_string *org_s; | |
1235 | ||
1236 | gs_array[n_gs] = stash; | |
1237 | gs = gs_array[n_gs]; | |
1238 | stash += sizeof(struct usb_gadget_strings); | |
1239 | gs->language = sp[n_gs]->language; | |
1240 | gs->strings = stash; | |
1241 | org_s = sp[n_gs]->strings; | |
1242 | ||
1243 | for (n_s = 0; n_s < n_strings; n_s++) { | |
1244 | s = stash; | |
1245 | stash += sizeof(struct usb_string); | |
1246 | if (org_s->s) | |
1247 | s->s = org_s->s; | |
1248 | else | |
1249 | s->s = ""; | |
1250 | org_s++; | |
1251 | } | |
1252 | s = stash; | |
1253 | s->s = NULL; | |
1254 | stash += sizeof(struct usb_string); | |
1255 | ||
1256 | } | |
1257 | gs_array[n_gs] = NULL; | |
1258 | return uc; | |
1259 | } | |
1260 | ||
1261 | /** | |
1262 | * usb_gstrings_attach() - attach gadget strings to a cdev and assign ids | |
1263 | * @cdev: the device whose string descriptor IDs are being allocated | |
1264 | * and attached. | |
1265 | * @sp: an array of usb_gadget_strings to attach. | |
1266 | * @n_strings: number of entries in each usb_strings array (sp[]->strings) | |
1267 | * | |
1268 | * This function will create a deep copy of usb_gadget_strings and usb_string | |
1269 | * and attach it to the cdev. The actual string (usb_string.s) will not be | |
1270 | * copied but only a referenced will be made. The struct usb_gadget_strings | |
06ed0de5 | 1271 | * array may contain multiple languages and should be NULL terminated. |
9bb2859f SAS |
1272 | * The ->language pointer of each struct usb_gadget_strings has to contain the |
1273 | * same amount of entries. | |
1274 | * For instance: sp[0] is en-US, sp[1] is es-ES. It is expected that the first | |
06ed0de5 | 1275 | * usb_string entry of es-ES contains the translation of the first usb_string |
9bb2859f SAS |
1276 | * entry of en-US. Therefore both entries become the same id assign. |
1277 | */ | |
1278 | struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, | |
1279 | struct usb_gadget_strings **sp, unsigned n_strings) | |
1280 | { | |
1281 | struct usb_gadget_string_container *uc; | |
1282 | struct usb_gadget_strings **n_gs; | |
1283 | unsigned n_gstrings = 0; | |
1284 | unsigned i; | |
1285 | int ret; | |
1286 | ||
1287 | for (i = 0; sp[i]; i++) | |
1288 | n_gstrings++; | |
1289 | ||
1290 | if (!n_gstrings) | |
1291 | return ERR_PTR(-EINVAL); | |
1292 | ||
1293 | uc = copy_gadget_strings(sp, n_gstrings, n_strings); | |
1294 | if (IS_ERR(uc)) | |
dad4babe | 1295 | return ERR_CAST(uc); |
9bb2859f SAS |
1296 | |
1297 | n_gs = get_containers_gs(uc); | |
1298 | ret = usb_string_ids_tab(cdev, n_gs[0]->strings); | |
1299 | if (ret) | |
1300 | goto err; | |
1301 | ||
1302 | for (i = 1; i < n_gstrings; i++) { | |
1303 | struct usb_string *m_s; | |
1304 | struct usb_string *s; | |
1305 | unsigned n; | |
1306 | ||
1307 | m_s = n_gs[0]->strings; | |
1308 | s = n_gs[i]->strings; | |
1309 | for (n = 0; n < n_strings; n++) { | |
1310 | s->id = m_s->id; | |
1311 | s++; | |
1312 | m_s++; | |
1313 | } | |
1314 | } | |
1315 | list_add_tail(&uc->list, &cdev->gstrings); | |
1316 | return n_gs[0]->strings; | |
1317 | err: | |
1318 | kfree(uc); | |
1319 | return ERR_PTR(ret); | |
1320 | } | |
1321 | EXPORT_SYMBOL_GPL(usb_gstrings_attach); | |
1322 | ||
f2adc4f8 MN |
1323 | /** |
1324 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 1325 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
1326 | * @n: number of string IDs to allocate |
1327 | * Context: single threaded during gadget setup | |
1328 | * | |
1329 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 1330 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
1331 | * is, returns last requested ID which is now very useful information. |
1332 | * | |
1333 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
1334 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1335 | * then store that ID in the appropriate descriptors and string table. | |
1336 | * | |
1337 | * All string identifier should be allocated using this, | |
1338 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1339 | * example different functions don't wrongly assign different meanings | |
1340 | * to the same identifier. | |
1341 | */ | |
1342 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
1343 | { | |
1344 | unsigned next = c->next_string_id; | |
1345 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
1346 | return -ENODEV; | |
1347 | c->next_string_id += n; | |
1348 | return next + 1; | |
1349 | } | |
721e2e91 | 1350 | EXPORT_SYMBOL_GPL(usb_string_ids_n); |
f2adc4f8 | 1351 | |
40982be5 DB |
1352 | /*-------------------------------------------------------------------------*/ |
1353 | ||
1354 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1355 | { | |
a7c12eaf FB |
1356 | struct usb_composite_dev *cdev; |
1357 | ||
40982be5 DB |
1358 | if (req->status || req->actual != req->length) |
1359 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1360 | "setup complete --> %d, %d/%d\n", | |
1361 | req->status, req->actual, req->length); | |
a7c12eaf FB |
1362 | |
1363 | /* | |
1364 | * REVIST The same ep0 requests are shared with function drivers | |
1365 | * so they don't have to maintain the same ->complete() stubs. | |
1366 | * | |
1367 | * Because of that, we need to check for the validity of ->context | |
1368 | * here, even though we know we've set it to something useful. | |
1369 | */ | |
1370 | if (!req->context) | |
1371 | return; | |
1372 | ||
1373 | cdev = req->context; | |
1374 | ||
1375 | if (cdev->req == req) | |
1376 | cdev->setup_pending = false; | |
1377 | else if (cdev->os_desc_req == req) | |
1378 | cdev->os_desc_pending = false; | |
1379 | else | |
1380 | WARN(1, "unknown request %p\n", req); | |
1381 | } | |
1382 | ||
1383 | static int composite_ep0_queue(struct usb_composite_dev *cdev, | |
1384 | struct usb_request *req, gfp_t gfp_flags) | |
1385 | { | |
1386 | int ret; | |
1387 | ||
1388 | ret = usb_ep_queue(cdev->gadget->ep0, req, gfp_flags); | |
1389 | if (ret == 0) { | |
1390 | if (cdev->req == req) | |
1391 | cdev->setup_pending = true; | |
1392 | else if (cdev->os_desc_req == req) | |
1393 | cdev->os_desc_pending = true; | |
1394 | else | |
1395 | WARN(1, "unknown request %p\n", req); | |
1396 | } | |
1397 | ||
1398 | return ret; | |
40982be5 DB |
1399 | } |
1400 | ||
37a3a533 AP |
1401 | static int count_ext_compat(struct usb_configuration *c) |
1402 | { | |
1403 | int i, res; | |
1404 | ||
1405 | res = 0; | |
1406 | for (i = 0; i < c->next_interface_id; ++i) { | |
1407 | struct usb_function *f; | |
1408 | int j; | |
1409 | ||
1410 | f = c->interface[i]; | |
1411 | for (j = 0; j < f->os_desc_n; ++j) { | |
1412 | struct usb_os_desc *d; | |
1413 | ||
1414 | if (i != f->os_desc_table[j].if_id) | |
1415 | continue; | |
1416 | d = f->os_desc_table[j].os_desc; | |
1417 | if (d && d->ext_compat_id) | |
1418 | ++res; | |
1419 | } | |
1420 | } | |
1421 | BUG_ON(res > 255); | |
1422 | return res; | |
1423 | } | |
1424 | ||
5d6ae4f0 | 1425 | static int fill_ext_compat(struct usb_configuration *c, u8 *buf) |
37a3a533 AP |
1426 | { |
1427 | int i, count; | |
1428 | ||
1429 | count = 16; | |
636ba13a | 1430 | buf += 16; |
37a3a533 AP |
1431 | for (i = 0; i < c->next_interface_id; ++i) { |
1432 | struct usb_function *f; | |
1433 | int j; | |
1434 | ||
1435 | f = c->interface[i]; | |
1436 | for (j = 0; j < f->os_desc_n; ++j) { | |
1437 | struct usb_os_desc *d; | |
1438 | ||
1439 | if (i != f->os_desc_table[j].if_id) | |
1440 | continue; | |
1441 | d = f->os_desc_table[j].os_desc; | |
1442 | if (d && d->ext_compat_id) { | |
1443 | *buf++ = i; | |
1444 | *buf++ = 0x01; | |
1445 | memcpy(buf, d->ext_compat_id, 16); | |
1446 | buf += 22; | |
1447 | } else { | |
1448 | ++buf; | |
1449 | *buf = 0x01; | |
1450 | buf += 23; | |
1451 | } | |
1452 | count += 24; | |
5d6ae4f0 CD |
1453 | if (count + 24 >= USB_COMP_EP0_OS_DESC_BUFSIZ) |
1454 | return count; | |
37a3a533 AP |
1455 | } |
1456 | } | |
5d6ae4f0 CD |
1457 | |
1458 | return count; | |
37a3a533 AP |
1459 | } |
1460 | ||
1461 | static int count_ext_prop(struct usb_configuration *c, int interface) | |
1462 | { | |
1463 | struct usb_function *f; | |
849b1333 | 1464 | int j; |
37a3a533 AP |
1465 | |
1466 | f = c->interface[interface]; | |
1467 | for (j = 0; j < f->os_desc_n; ++j) { | |
1468 | struct usb_os_desc *d; | |
1469 | ||
1470 | if (interface != f->os_desc_table[j].if_id) | |
1471 | continue; | |
1472 | d = f->os_desc_table[j].os_desc; | |
1473 | if (d && d->ext_compat_id) | |
1474 | return d->ext_prop_count; | |
1475 | } | |
849b1333 | 1476 | return 0; |
37a3a533 AP |
1477 | } |
1478 | ||
1479 | static int len_ext_prop(struct usb_configuration *c, int interface) | |
1480 | { | |
1481 | struct usb_function *f; | |
1482 | struct usb_os_desc *d; | |
1483 | int j, res; | |
1484 | ||
1485 | res = 10; /* header length */ | |
1486 | f = c->interface[interface]; | |
1487 | for (j = 0; j < f->os_desc_n; ++j) { | |
1488 | if (interface != f->os_desc_table[j].if_id) | |
1489 | continue; | |
1490 | d = f->os_desc_table[j].os_desc; | |
1491 | if (d) | |
1492 | return min(res + d->ext_prop_len, 4096); | |
1493 | } | |
1494 | return res; | |
1495 | } | |
1496 | ||
1497 | static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf) | |
1498 | { | |
1499 | struct usb_function *f; | |
1500 | struct usb_os_desc *d; | |
1501 | struct usb_os_desc_ext_prop *ext_prop; | |
1502 | int j, count, n, ret; | |
37a3a533 AP |
1503 | |
1504 | f = c->interface[interface]; | |
5d6ae4f0 | 1505 | count = 10; /* header length */ |
636ba13a | 1506 | buf += 10; |
37a3a533 AP |
1507 | for (j = 0; j < f->os_desc_n; ++j) { |
1508 | if (interface != f->os_desc_table[j].if_id) | |
1509 | continue; | |
1510 | d = f->os_desc_table[j].os_desc; | |
1511 | if (d) | |
1512 | list_for_each_entry(ext_prop, &d->ext_prop, entry) { | |
5d6ae4f0 | 1513 | n = ext_prop->data_len + |
37a3a533 | 1514 | ext_prop->name_len + 14; |
5d6ae4f0 CD |
1515 | if (count + n >= USB_COMP_EP0_OS_DESC_BUFSIZ) |
1516 | return count; | |
1517 | usb_ext_prop_put_size(buf, n); | |
37a3a533 AP |
1518 | usb_ext_prop_put_type(buf, ext_prop->type); |
1519 | ret = usb_ext_prop_put_name(buf, ext_prop->name, | |
1520 | ext_prop->name_len); | |
1521 | if (ret < 0) | |
1522 | return ret; | |
1523 | switch (ext_prop->type) { | |
1524 | case USB_EXT_PROP_UNICODE: | |
1525 | case USB_EXT_PROP_UNICODE_ENV: | |
1526 | case USB_EXT_PROP_UNICODE_LINK: | |
1527 | usb_ext_prop_put_unicode(buf, ret, | |
1528 | ext_prop->data, | |
1529 | ext_prop->data_len); | |
1530 | break; | |
1531 | case USB_EXT_PROP_BINARY: | |
1532 | usb_ext_prop_put_binary(buf, ret, | |
1533 | ext_prop->data, | |
1534 | ext_prop->data_len); | |
1535 | break; | |
1536 | case USB_EXT_PROP_LE32: | |
1537 | /* not implemented */ | |
1538 | case USB_EXT_PROP_BE32: | |
1539 | /* not implemented */ | |
1540 | default: | |
1541 | return -EINVAL; | |
1542 | } | |
5d6ae4f0 CD |
1543 | buf += n; |
1544 | count += n; | |
37a3a533 AP |
1545 | } |
1546 | } | |
1547 | ||
5d6ae4f0 | 1548 | return count; |
37a3a533 AP |
1549 | } |
1550 | ||
40982be5 DB |
1551 | /* |
1552 | * The setup() callback implements all the ep0 functionality that's | |
1553 | * not handled lower down, in hardware or the hardware driver(like | |
1554 | * device and endpoint feature flags, and their status). It's all | |
1555 | * housekeeping for the gadget function we're implementing. Most of | |
1556 | * the work is in config and function specific setup. | |
1557 | */ | |
2d5a8899 | 1558 | int |
40982be5 DB |
1559 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) |
1560 | { | |
1561 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1562 | struct usb_request *req = cdev->req; | |
1563 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1564 | int status = 0; |
40982be5 | 1565 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1566 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1567 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1568 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1569 | struct usb_function *f = NULL; | |
5242658d | 1570 | u8 endp; |
40982be5 DB |
1571 | |
1572 | /* partial re-init of the response message; the function or the | |
1573 | * gadget might need to intercept e.g. a control-OUT completion | |
1574 | * when we delegate to it. | |
1575 | */ | |
1576 | req->zero = 0; | |
57943716 | 1577 | req->context = cdev; |
40982be5 | 1578 | req->complete = composite_setup_complete; |
2edb11cb | 1579 | req->length = 0; |
40982be5 DB |
1580 | gadget->ep0->driver_data = cdev; |
1581 | ||
232c0102 AP |
1582 | /* |
1583 | * Don't let non-standard requests match any of the cases below | |
1584 | * by accident. | |
1585 | */ | |
1586 | if ((ctrl->bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) | |
1587 | goto unknown; | |
1588 | ||
40982be5 DB |
1589 | switch (ctrl->bRequest) { |
1590 | ||
1591 | /* we handle all standard USB descriptors */ | |
1592 | case USB_REQ_GET_DESCRIPTOR: | |
1593 | if (ctrl->bRequestType != USB_DIR_IN) | |
1594 | goto unknown; | |
1595 | switch (w_value >> 8) { | |
1596 | ||
1597 | case USB_DT_DEVICE: | |
1598 | cdev->desc.bNumConfigurations = | |
1599 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1600 | cdev->desc.bMaxPacketSize0 = |
1601 | cdev->gadget->ep0->maxpacket; | |
1602 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1603 | if (gadget->speed >= USB_SPEED_SUPER) { |
1ef6c42a | 1604 | cdev->desc.bcdUSB = cpu_to_le16(0x0320); |
a8f21156 SAS |
1605 | cdev->desc.bMaxPacketSize0 = 9; |
1606 | } else { | |
bdb64d72 | 1607 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1608 | } |
5527e733 | 1609 | } else { |
a9548c55 JY |
1610 | if (gadget->lpm_capable) |
1611 | cdev->desc.bcdUSB = cpu_to_le16(0x0201); | |
1612 | else | |
1613 | cdev->desc.bcdUSB = cpu_to_le16(0x0200); | |
bdb64d72 TB |
1614 | } |
1615 | ||
40982be5 DB |
1616 | value = min(w_length, (u16) sizeof cdev->desc); |
1617 | memcpy(req->buf, &cdev->desc, value); | |
1618 | break; | |
1619 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1620 | if (!gadget_is_dualspeed(gadget) || |
1621 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1622 | break; |
1623 | device_qual(cdev); | |
1624 | value = min_t(int, w_length, | |
1625 | sizeof(struct usb_qualifier_descriptor)); | |
1626 | break; | |
1627 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1628 | if (!gadget_is_dualspeed(gadget) || |
1629 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1630 | break; |
1631 | /* FALLTHROUGH */ | |
1632 | case USB_DT_CONFIG: | |
1633 | value = config_desc(cdev, w_value); | |
1634 | if (value >= 0) | |
1635 | value = min(w_length, (u16) value); | |
1636 | break; | |
1637 | case USB_DT_STRING: | |
1638 | value = get_string(cdev, req->buf, | |
1639 | w_index, w_value & 0xff); | |
1640 | if (value >= 0) | |
1641 | value = min(w_length, (u16) value); | |
1642 | break; | |
bdb64d72 | 1643 | case USB_DT_BOS: |
a9548c55 JY |
1644 | if (gadget_is_superspeed(gadget) || |
1645 | gadget->lpm_capable) { | |
bdb64d72 TB |
1646 | value = bos_desc(cdev); |
1647 | value = min(w_length, (u16) value); | |
1648 | } | |
1649 | break; | |
53e6242d ML |
1650 | case USB_DT_OTG: |
1651 | if (gadget_is_otg(gadget)) { | |
1652 | struct usb_configuration *config; | |
1653 | int otg_desc_len = 0; | |
1654 | ||
1655 | if (cdev->config) | |
1656 | config = cdev->config; | |
1657 | else | |
1658 | config = list_first_entry( | |
1659 | &cdev->configs, | |
1660 | struct usb_configuration, list); | |
1661 | if (!config) | |
1662 | goto done; | |
1663 | ||
1664 | if (gadget->otg_caps && | |
1665 | (gadget->otg_caps->otg_rev >= 0x0200)) | |
1666 | otg_desc_len += sizeof( | |
1667 | struct usb_otg20_descriptor); | |
1668 | else | |
1669 | otg_desc_len += sizeof( | |
1670 | struct usb_otg_descriptor); | |
1671 | ||
1672 | value = min_t(int, w_length, otg_desc_len); | |
1673 | memcpy(req->buf, config->descriptors[0], value); | |
1674 | } | |
1675 | break; | |
40982be5 DB |
1676 | } |
1677 | break; | |
1678 | ||
1679 | /* any number of configs can work */ | |
1680 | case USB_REQ_SET_CONFIGURATION: | |
1681 | if (ctrl->bRequestType != 0) | |
1682 | goto unknown; | |
1683 | if (gadget_is_otg(gadget)) { | |
1684 | if (gadget->a_hnp_support) | |
1685 | DBG(cdev, "HNP available\n"); | |
1686 | else if (gadget->a_alt_hnp_support) | |
1687 | DBG(cdev, "HNP on another port\n"); | |
1688 | else | |
1689 | VDBG(cdev, "HNP inactive\n"); | |
1690 | } | |
1691 | spin_lock(&cdev->lock); | |
1692 | value = set_config(cdev, ctrl, w_value); | |
1693 | spin_unlock(&cdev->lock); | |
1694 | break; | |
1695 | case USB_REQ_GET_CONFIGURATION: | |
1696 | if (ctrl->bRequestType != USB_DIR_IN) | |
1697 | goto unknown; | |
1698 | if (cdev->config) | |
1699 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1700 | else | |
1701 | *(u8 *)req->buf = 0; | |
1702 | value = min(w_length, (u16) 1); | |
1703 | break; | |
1704 | ||
7e4da3fc | 1705 | /* function drivers must handle get/set altsetting */ |
40982be5 DB |
1706 | case USB_REQ_SET_INTERFACE: |
1707 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1708 | goto unknown; | |
ff085de7 | 1709 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1710 | break; |
08889517 | 1711 | f = cdev->config->interface[intf]; |
40982be5 DB |
1712 | if (!f) |
1713 | break; | |
7e4da3fc KO |
1714 | |
1715 | /* | |
1716 | * If there's no get_alt() method, we know only altsetting zero | |
1717 | * works. There is no need to check if set_alt() is not NULL | |
1718 | * as we check this in usb_add_function(). | |
1719 | */ | |
1720 | if (w_value && !f->get_alt) | |
40982be5 | 1721 | break; |
980900d6 CY |
1722 | |
1723 | spin_lock(&cdev->lock); | |
40982be5 | 1724 | value = f->set_alt(f, w_index, w_value); |
1b9ba000 RQ |
1725 | if (value == USB_GADGET_DELAYED_STATUS) { |
1726 | DBG(cdev, | |
1727 | "%s: interface %d (%s) requested delayed status\n", | |
1728 | __func__, intf, f->name); | |
1729 | cdev->delayed_status++; | |
1730 | DBG(cdev, "delayed_status count %d\n", | |
1731 | cdev->delayed_status); | |
1732 | } | |
980900d6 | 1733 | spin_unlock(&cdev->lock); |
40982be5 DB |
1734 | break; |
1735 | case USB_REQ_GET_INTERFACE: | |
1736 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1737 | goto unknown; | |
ff085de7 | 1738 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1739 | break; |
08889517 | 1740 | f = cdev->config->interface[intf]; |
40982be5 DB |
1741 | if (!f) |
1742 | break; | |
1743 | /* lots of interfaces only need altsetting zero... */ | |
1744 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1745 | if (value < 0) | |
1746 | break; | |
1747 | *((u8 *)req->buf) = value; | |
1748 | value = min(w_length, (u16) 1); | |
1749 | break; | |
bdb64d72 | 1750 | case USB_REQ_GET_STATUS: |
c5348b62 LJ |
1751 | if (gadget_is_otg(gadget) && gadget->hnp_polling_support && |
1752 | (w_index == OTG_STS_SELECTOR)) { | |
1753 | if (ctrl->bRequestType != (USB_DIR_IN | | |
1754 | USB_RECIP_DEVICE)) | |
1755 | goto unknown; | |
1756 | *((u8 *)req->buf) = gadget->host_request_flag; | |
1757 | value = 1; | |
1758 | break; | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * USB 3.0 additions: | |
1763 | * Function driver should handle get_status request. If such cb | |
1764 | * wasn't supplied we respond with default value = 0 | |
1765 | * Note: function driver should supply such cb only for the | |
1766 | * first interface of the function | |
1767 | */ | |
bdb64d72 TB |
1768 | if (!gadget_is_superspeed(gadget)) |
1769 | goto unknown; | |
1770 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1771 | goto unknown; | |
1772 | value = 2; /* This is the length of the get_status reply */ | |
1773 | put_unaligned_le16(0, req->buf); | |
1774 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1775 | break; | |
1776 | f = cdev->config->interface[intf]; | |
1777 | if (!f) | |
1778 | break; | |
1779 | status = f->get_status ? f->get_status(f) : 0; | |
1780 | if (status < 0) | |
1781 | break; | |
1782 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1783 | break; | |
1784 | /* | |
1785 | * Function drivers should handle SetFeature/ClearFeature | |
1786 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1787 | * only for the first interface of the function | |
1788 | */ | |
1789 | case USB_REQ_CLEAR_FEATURE: | |
1790 | case USB_REQ_SET_FEATURE: | |
1791 | if (!gadget_is_superspeed(gadget)) | |
1792 | goto unknown; | |
1793 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1794 | goto unknown; | |
1795 | switch (w_value) { | |
1796 | case USB_INTRF_FUNC_SUSPEND: | |
1797 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1798 | break; | |
1799 | f = cdev->config->interface[intf]; | |
1800 | if (!f) | |
1801 | break; | |
1802 | value = 0; | |
1803 | if (f->func_suspend) | |
1804 | value = f->func_suspend(f, w_index >> 8); | |
1805 | if (value < 0) { | |
1806 | ERROR(cdev, | |
1807 | "func_suspend() returned error %d\n", | |
1808 | value); | |
1809 | value = 0; | |
1810 | } | |
1811 | break; | |
1812 | } | |
1813 | break; | |
40982be5 DB |
1814 | default: |
1815 | unknown: | |
37a3a533 AP |
1816 | /* |
1817 | * OS descriptors handling | |
1818 | */ | |
1819 | if (cdev->use_os_string && cdev->os_desc_config && | |
df6738d0 | 1820 | (ctrl->bRequestType & USB_TYPE_VENDOR) && |
37a3a533 | 1821 | ctrl->bRequest == cdev->b_vendor_code) { |
37a3a533 AP |
1822 | struct usb_configuration *os_desc_cfg; |
1823 | u8 *buf; | |
1824 | int interface; | |
1825 | int count = 0; | |
1826 | ||
1827 | req = cdev->os_desc_req; | |
57943716 | 1828 | req->context = cdev; |
37a3a533 AP |
1829 | req->complete = composite_setup_complete; |
1830 | buf = req->buf; | |
1831 | os_desc_cfg = cdev->os_desc_config; | |
5d6ae4f0 | 1832 | w_length = min_t(u16, w_length, USB_COMP_EP0_OS_DESC_BUFSIZ); |
37a3a533 AP |
1833 | memset(buf, 0, w_length); |
1834 | buf[5] = 0x01; | |
1835 | switch (ctrl->bRequestType & USB_RECIP_MASK) { | |
1836 | case USB_RECIP_DEVICE: | |
1837 | if (w_index != 0x4 || (w_value >> 8)) | |
1838 | break; | |
1839 | buf[6] = w_index; | |
636ba13a CD |
1840 | /* Number of ext compat interfaces */ |
1841 | count = count_ext_compat(os_desc_cfg); | |
1842 | buf[8] = count; | |
1843 | count *= 24; /* 24 B/ext compat desc */ | |
1844 | count += 16; /* header */ | |
1845 | put_unaligned_le32(count, buf); | |
1846 | value = w_length; | |
1847 | if (w_length > 0x10) { | |
5d6ae4f0 CD |
1848 | value = fill_ext_compat(os_desc_cfg, buf); |
1849 | value = min_t(u16, w_length, value); | |
37a3a533 AP |
1850 | } |
1851 | break; | |
1852 | case USB_RECIP_INTERFACE: | |
1853 | if (w_index != 0x5 || (w_value >> 8)) | |
1854 | break; | |
1855 | interface = w_value & 0xFF; | |
1856 | buf[6] = w_index; | |
636ba13a CD |
1857 | count = count_ext_prop(os_desc_cfg, |
1858 | interface); | |
1859 | put_unaligned_le16(count, buf + 8); | |
1860 | count = len_ext_prop(os_desc_cfg, | |
1861 | interface); | |
1862 | put_unaligned_le32(count, buf); | |
1863 | value = w_length; | |
1864 | if (w_length > 0x0A) { | |
37a3a533 AP |
1865 | value = fill_ext_prop(os_desc_cfg, |
1866 | interface, buf); | |
636ba13a CD |
1867 | if (value >= 0) |
1868 | value = min_t(u16, w_length, value); | |
37a3a533 AP |
1869 | } |
1870 | break; | |
1871 | } | |
7e14f47a | 1872 | |
636ba13a | 1873 | goto check_value; |
37a3a533 AP |
1874 | } |
1875 | ||
40982be5 DB |
1876 | VDBG(cdev, |
1877 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1878 | ctrl->bRequestType, ctrl->bRequest, | |
1879 | w_value, w_index, w_length); | |
1880 | ||
5242658d LP |
1881 | /* functions always handle their interfaces and endpoints... |
1882 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 | 1883 | * configuration code. |
40982be5 | 1884 | */ |
b4c21f0b KVA |
1885 | if (cdev->config) { |
1886 | list_for_each_entry(f, &cdev->config->functions, list) | |
1a00b457 FH |
1887 | if (f->req_match && |
1888 | f->req_match(f, ctrl, false)) | |
b4c21f0b | 1889 | goto try_fun_setup; |
1a00b457 FH |
1890 | } else { |
1891 | struct usb_configuration *c; | |
1892 | list_for_each_entry(c, &cdev->configs, list) | |
1893 | list_for_each_entry(f, &c->functions, list) | |
1894 | if (f->req_match && | |
1895 | f->req_match(f, ctrl, true)) | |
1896 | goto try_fun_setup; | |
b4c21f0b | 1897 | } |
1a00b457 | 1898 | f = NULL; |
b4c21f0b | 1899 | |
5242658d LP |
1900 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1901 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1902 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1903 | break; |
1904 | f = cdev->config->interface[intf]; | |
5242658d LP |
1905 | break; |
1906 | ||
1907 | case USB_RECIP_ENDPOINT: | |
c526c62d PC |
1908 | if (!cdev->config) |
1909 | break; | |
5242658d LP |
1910 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); |
1911 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1912 | if (test_bit(endp, f->endpoints)) | |
1913 | break; | |
1914 | } | |
1915 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1916 | f = NULL; |
5242658d | 1917 | break; |
40982be5 | 1918 | } |
f563d230 | 1919 | try_fun_setup: |
5242658d LP |
1920 | if (f && f->setup) |
1921 | value = f->setup(f, ctrl); | |
1922 | else { | |
40982be5 DB |
1923 | struct usb_configuration *c; |
1924 | ||
1925 | c = cdev->config; | |
a01091e5 AP |
1926 | if (!c) |
1927 | goto done; | |
1928 | ||
1929 | /* try current config's setup */ | |
1930 | if (c->setup) { | |
40982be5 | 1931 | value = c->setup(c, ctrl); |
a01091e5 AP |
1932 | goto done; |
1933 | } | |
1934 | ||
1935 | /* try the only function in the current config */ | |
1936 | if (!list_is_singular(&c->functions)) | |
1937 | goto done; | |
1938 | f = list_first_entry(&c->functions, struct usb_function, | |
1939 | list); | |
1940 | if (f->setup) | |
1941 | value = f->setup(f, ctrl); | |
40982be5 DB |
1942 | } |
1943 | ||
1944 | goto done; | |
1945 | } | |
1946 | ||
636ba13a | 1947 | check_value: |
40982be5 | 1948 | /* respond with data transfer before status phase? */ |
1b9ba000 | 1949 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 | 1950 | req->length = value; |
57943716 | 1951 | req->context = cdev; |
40982be5 | 1952 | req->zero = value < w_length; |
a7c12eaf | 1953 | value = composite_ep0_queue(cdev, req, GFP_ATOMIC); |
40982be5 DB |
1954 | if (value < 0) { |
1955 | DBG(cdev, "ep_queue --> %d\n", value); | |
1956 | req->status = 0; | |
1957 | composite_setup_complete(gadget->ep0, req); | |
1958 | } | |
1b9ba000 RQ |
1959 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1960 | WARN(cdev, | |
1961 | "%s: Delayed status not supported for w_length != 0", | |
1962 | __func__); | |
40982be5 DB |
1963 | } |
1964 | ||
1965 | done: | |
1966 | /* device either stalls (value < 0) or reports success */ | |
1967 | return value; | |
1968 | } | |
1969 | ||
2d5a8899 | 1970 | void composite_disconnect(struct usb_gadget *gadget) |
40982be5 DB |
1971 | { |
1972 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1973 | unsigned long flags; | |
1974 | ||
1975 | /* REVISIT: should we have config and device level | |
1976 | * disconnect callbacks? | |
1977 | */ | |
1978 | spin_lock_irqsave(&cdev->lock, flags); | |
1979 | if (cdev->config) | |
1980 | reset_config(cdev); | |
ffe0b335 SAS |
1981 | if (cdev->driver->disconnect) |
1982 | cdev->driver->disconnect(cdev); | |
40982be5 DB |
1983 | spin_unlock_irqrestore(&cdev->lock, flags); |
1984 | } | |
1985 | ||
1986 | /*-------------------------------------------------------------------------*/ | |
1987 | ||
ce26bd23 GKH |
1988 | static ssize_t suspended_show(struct device *dev, struct device_attribute *attr, |
1989 | char *buf) | |
f48cf80f FC |
1990 | { |
1991 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1992 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1993 | ||
1994 | return sprintf(buf, "%d\n", cdev->suspended); | |
1995 | } | |
ce26bd23 | 1996 | static DEVICE_ATTR_RO(suspended); |
f48cf80f | 1997 | |
779d516c | 1998 | static void __composite_unbind(struct usb_gadget *gadget, bool unbind_driver) |
40982be5 DB |
1999 | { |
2000 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
aec17e1e AG |
2001 | struct usb_gadget_strings *gstr = cdev->driver->strings[0]; |
2002 | struct usb_string *dev_str = gstr->strings; | |
40982be5 DB |
2003 | |
2004 | /* composite_disconnect() must already have been called | |
2005 | * by the underlying peripheral controller driver! | |
2006 | * so there's no i/o concurrency that could affect the | |
2007 | * state protected by cdev->lock. | |
2008 | */ | |
2009 | WARN_ON(cdev->config); | |
2010 | ||
2011 | while (!list_empty(&cdev->configs)) { | |
2012 | struct usb_configuration *c; | |
40982be5 DB |
2013 | c = list_first_entry(&cdev->configs, |
2014 | struct usb_configuration, list); | |
51cce6fc | 2015 | remove_config(cdev, c); |
40982be5 | 2016 | } |
779d516c | 2017 | if (cdev->driver->unbind && unbind_driver) |
ffe0b335 | 2018 | cdev->driver->unbind(cdev); |
40982be5 | 2019 | |
a5923340 SAS |
2020 | composite_dev_cleanup(cdev); |
2021 | ||
aec17e1e AG |
2022 | if (dev_str[USB_GADGET_MANUFACTURER_IDX].s == cdev->def_manufacturer) |
2023 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = ""; | |
2024 | ||
cc2683c3 | 2025 | kfree(cdev->def_manufacturer); |
40982be5 DB |
2026 | kfree(cdev); |
2027 | set_gadget_data(gadget, NULL); | |
40982be5 DB |
2028 | } |
2029 | ||
779d516c SAS |
2030 | static void composite_unbind(struct usb_gadget *gadget) |
2031 | { | |
2032 | __composite_unbind(gadget, true); | |
2033 | } | |
2034 | ||
7d16e8d3 SAS |
2035 | static void update_unchanged_dev_desc(struct usb_device_descriptor *new, |
2036 | const struct usb_device_descriptor *old) | |
2037 | { | |
2038 | __le16 idVendor; | |
2039 | __le16 idProduct; | |
2040 | __le16 bcdDevice; | |
1cf0d264 | 2041 | u8 iSerialNumber; |
03de9bf6 | 2042 | u8 iManufacturer; |
2d35ee47 | 2043 | u8 iProduct; |
7d16e8d3 SAS |
2044 | |
2045 | /* | |
2046 | * these variables may have been set in | |
2047 | * usb_composite_overwrite_options() | |
2048 | */ | |
2049 | idVendor = new->idVendor; | |
2050 | idProduct = new->idProduct; | |
2051 | bcdDevice = new->bcdDevice; | |
1cf0d264 | 2052 | iSerialNumber = new->iSerialNumber; |
03de9bf6 | 2053 | iManufacturer = new->iManufacturer; |
2d35ee47 | 2054 | iProduct = new->iProduct; |
7d16e8d3 SAS |
2055 | |
2056 | *new = *old; | |
2057 | if (idVendor) | |
2058 | new->idVendor = idVendor; | |
2059 | if (idProduct) | |
2060 | new->idProduct = idProduct; | |
2061 | if (bcdDevice) | |
2062 | new->bcdDevice = bcdDevice; | |
ed9cbda6 SAS |
2063 | else |
2064 | new->bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1cf0d264 SAS |
2065 | if (iSerialNumber) |
2066 | new->iSerialNumber = iSerialNumber; | |
03de9bf6 SAS |
2067 | if (iManufacturer) |
2068 | new->iManufacturer = iManufacturer; | |
2d35ee47 SAS |
2069 | if (iProduct) |
2070 | new->iProduct = iProduct; | |
7d16e8d3 SAS |
2071 | } |
2072 | ||
a5923340 SAS |
2073 | int composite_dev_prepare(struct usb_composite_driver *composite, |
2074 | struct usb_composite_dev *cdev) | |
ffe0b335 | 2075 | { |
a5923340 SAS |
2076 | struct usb_gadget *gadget = cdev->gadget; |
2077 | int ret = -ENOMEM; | |
40982be5 DB |
2078 | |
2079 | /* preallocate control response and buffer */ | |
2080 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
2081 | if (!cdev->req) | |
a5923340 SAS |
2082 | return -ENOMEM; |
2083 | ||
e13f17ff | 2084 | cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); |
40982be5 DB |
2085 | if (!cdev->req->buf) |
2086 | goto fail; | |
a5923340 SAS |
2087 | |
2088 | ret = device_create_file(&gadget->dev, &dev_attr_suspended); | |
2089 | if (ret) | |
2090 | goto fail_dev; | |
2091 | ||
40982be5 | 2092 | cdev->req->complete = composite_setup_complete; |
57943716 | 2093 | cdev->req->context = cdev; |
40982be5 DB |
2094 | gadget->ep0->driver_data = cdev; |
2095 | ||
40982be5 DB |
2096 | cdev->driver = composite; |
2097 | ||
37b5801e PM |
2098 | /* |
2099 | * As per USB compliance update, a device that is actively drawing | |
2100 | * more than 100mA from USB must report itself as bus-powered in | |
2101 | * the GetStatus(DEVICE) call. | |
2102 | */ | |
2103 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
2104 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
2105 | |
2106 | /* interface and string IDs start at zero via kzalloc. | |
2107 | * we force endpoints to start unassigned; few controller | |
2108 | * drivers will zero ep->driver_data. | |
2109 | */ | |
a5923340 SAS |
2110 | usb_ep_autoconfig_reset(gadget); |
2111 | return 0; | |
2112 | fail_dev: | |
2113 | kfree(cdev->req->buf); | |
2114 | fail: | |
2115 | usb_ep_free_request(gadget->ep0, cdev->req); | |
2116 | cdev->req = NULL; | |
2117 | return ret; | |
2118 | } | |
2119 | ||
37a3a533 AP |
2120 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
2121 | struct usb_ep *ep0) | |
2122 | { | |
2123 | int ret = 0; | |
2124 | ||
2125 | cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL); | |
2126 | if (!cdev->os_desc_req) { | |
3887db5c | 2127 | ret = -ENOMEM; |
37a3a533 AP |
2128 | goto end; |
2129 | } | |
2130 | ||
5d6ae4f0 CD |
2131 | cdev->os_desc_req->buf = kmalloc(USB_COMP_EP0_OS_DESC_BUFSIZ, |
2132 | GFP_KERNEL); | |
37a3a533 | 2133 | if (!cdev->os_desc_req->buf) { |
3887db5c | 2134 | ret = -ENOMEM; |
990758c5 | 2135 | usb_ep_free_request(ep0, cdev->os_desc_req); |
37a3a533 AP |
2136 | goto end; |
2137 | } | |
57943716 | 2138 | cdev->os_desc_req->context = cdev; |
37a3a533 AP |
2139 | cdev->os_desc_req->complete = composite_setup_complete; |
2140 | end: | |
2141 | return ret; | |
2142 | } | |
2143 | ||
a5923340 SAS |
2144 | void composite_dev_cleanup(struct usb_composite_dev *cdev) |
2145 | { | |
27a46633 | 2146 | struct usb_gadget_string_container *uc, *tmp; |
aaeab02d | 2147 | struct usb_ep *ep, *tmp_ep; |
27a46633 SAS |
2148 | |
2149 | list_for_each_entry_safe(uc, tmp, &cdev->gstrings, list) { | |
2150 | list_del(&uc->list); | |
2151 | kfree(uc); | |
2152 | } | |
37a3a533 | 2153 | if (cdev->os_desc_req) { |
a7c12eaf FB |
2154 | if (cdev->os_desc_pending) |
2155 | usb_ep_dequeue(cdev->gadget->ep0, cdev->os_desc_req); | |
2156 | ||
37a3a533 AP |
2157 | kfree(cdev->os_desc_req->buf); |
2158 | usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req); | |
2159 | } | |
a5923340 | 2160 | if (cdev->req) { |
a7c12eaf FB |
2161 | if (cdev->setup_pending) |
2162 | usb_ep_dequeue(cdev->gadget->ep0, cdev->req); | |
2163 | ||
be0a8887 | 2164 | kfree(cdev->req->buf); |
a5923340 SAS |
2165 | usb_ep_free_request(cdev->gadget->ep0, cdev->req); |
2166 | } | |
88af8bbe | 2167 | cdev->next_string_id = 0; |
a5923340 | 2168 | device_remove_file(&cdev->gadget->dev, &dev_attr_suspended); |
aaeab02d BH |
2169 | |
2170 | /* | |
2171 | * Some UDC backends have a dynamic EP allocation scheme. | |
2172 | * | |
2173 | * In that case, the dispose() callback is used to notify the | |
2174 | * backend that the EPs are no longer in use. | |
2175 | * | |
2176 | * Note: The UDC backend can remove the EP from the ep_list as | |
2177 | * a result, so we need to use the _safe list iterator. | |
2178 | */ | |
2179 | list_for_each_entry_safe(ep, tmp_ep, | |
2180 | &cdev->gadget->ep_list, ep_list) { | |
2181 | if (ep->ops->dispose) | |
2182 | ep->ops->dispose(ep); | |
2183 | } | |
a5923340 SAS |
2184 | } |
2185 | ||
2186 | static int composite_bind(struct usb_gadget *gadget, | |
2187 | struct usb_gadget_driver *gdriver) | |
2188 | { | |
2189 | struct usb_composite_dev *cdev; | |
2190 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
2191 | int status = -ENOMEM; | |
2192 | ||
2193 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
2194 | if (!cdev) | |
2195 | return status; | |
2196 | ||
2197 | spin_lock_init(&cdev->lock); | |
2198 | cdev->gadget = gadget; | |
2199 | set_gadget_data(gadget, cdev); | |
2200 | INIT_LIST_HEAD(&cdev->configs); | |
9bb2859f | 2201 | INIT_LIST_HEAD(&cdev->gstrings); |
a5923340 SAS |
2202 | |
2203 | status = composite_dev_prepare(composite, cdev); | |
2204 | if (status) | |
2205 | goto fail; | |
40982be5 DB |
2206 | |
2207 | /* composite gadget needs to assign strings for whole device (like | |
2208 | * serial number), register function drivers, potentially update | |
2209 | * power state and consumption, etc | |
2210 | */ | |
fac3a43e | 2211 | status = composite->bind(cdev); |
40982be5 DB |
2212 | if (status < 0) |
2213 | goto fail; | |
2214 | ||
37a3a533 AP |
2215 | if (cdev->use_os_string) { |
2216 | status = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
2217 | if (status) | |
2218 | goto fail; | |
2219 | } | |
2220 | ||
7d16e8d3 | 2221 | update_unchanged_dev_desc(&cdev->desc, composite->dev); |
dbb442b8 | 2222 | |
ad1a8102 MN |
2223 | /* has userspace failed to provide a serial number? */ |
2224 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
2225 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 DB |
2226 | |
2227 | INFO(cdev, "%s ready\n", composite->name); | |
2228 | return 0; | |
2229 | ||
2230 | fail: | |
779d516c | 2231 | __composite_unbind(gadget, false); |
40982be5 DB |
2232 | return status; |
2233 | } | |
2234 | ||
2235 | /*-------------------------------------------------------------------------*/ | |
2236 | ||
3a571870 | 2237 | void composite_suspend(struct usb_gadget *gadget) |
40982be5 DB |
2238 | { |
2239 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2240 | struct usb_function *f; | |
2241 | ||
8942939a | 2242 | /* REVISIT: should we have config level |
40982be5 DB |
2243 | * suspend/resume callbacks? |
2244 | */ | |
2245 | DBG(cdev, "suspend\n"); | |
2246 | if (cdev->config) { | |
2247 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2248 | if (f->suspend) | |
2249 | f->suspend(f); | |
2250 | } | |
2251 | } | |
ffe0b335 SAS |
2252 | if (cdev->driver->suspend) |
2253 | cdev->driver->suspend(cdev); | |
f48cf80f FC |
2254 | |
2255 | cdev->suspended = 1; | |
b23f2f94 HW |
2256 | |
2257 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
2258 | } |
2259 | ||
3a571870 | 2260 | void composite_resume(struct usb_gadget *gadget) |
40982be5 DB |
2261 | { |
2262 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
2263 | struct usb_function *f; | |
56b1b909 | 2264 | u16 maxpower; |
40982be5 | 2265 | |
8942939a | 2266 | /* REVISIT: should we have config level |
40982be5 DB |
2267 | * suspend/resume callbacks? |
2268 | */ | |
2269 | DBG(cdev, "resume\n"); | |
ffe0b335 SAS |
2270 | if (cdev->driver->resume) |
2271 | cdev->driver->resume(cdev); | |
40982be5 DB |
2272 | if (cdev->config) { |
2273 | list_for_each_entry(f, &cdev->config->functions, list) { | |
2274 | if (f->resume) | |
2275 | f->resume(f); | |
2276 | } | |
b23f2f94 | 2277 | |
8f900a9a | 2278 | maxpower = cdev->config->MaxPower; |
b23f2f94 HW |
2279 | |
2280 | usb_gadget_vbus_draw(gadget, maxpower ? | |
8f900a9a | 2281 | maxpower : CONFIG_USB_GADGET_VBUS_DRAW); |
40982be5 | 2282 | } |
f48cf80f FC |
2283 | |
2284 | cdev->suspended = 0; | |
40982be5 DB |
2285 | } |
2286 | ||
2287 | /*-------------------------------------------------------------------------*/ | |
2288 | ||
ffe0b335 | 2289 | static const struct usb_gadget_driver composite_driver_template = { |
93952956 | 2290 | .bind = composite_bind, |
915c8bef | 2291 | .unbind = composite_unbind, |
40982be5 DB |
2292 | |
2293 | .setup = composite_setup, | |
d8a816fc | 2294 | .reset = composite_disconnect, |
40982be5 DB |
2295 | .disconnect = composite_disconnect, |
2296 | ||
2297 | .suspend = composite_suspend, | |
2298 | .resume = composite_resume, | |
2299 | ||
2300 | .driver = { | |
2301 | .owner = THIS_MODULE, | |
2302 | }, | |
2303 | }; | |
2304 | ||
2305 | /** | |
07a18bd7 | 2306 | * usb_composite_probe() - register a composite driver |
40982be5 | 2307 | * @driver: the driver to register |
43febb27 | 2308 | * |
40982be5 DB |
2309 | * Context: single threaded during gadget setup |
2310 | * | |
2311 | * This function is used to register drivers using the composite driver | |
2312 | * framework. The return value is zero, or a negative errno value. | |
2313 | * Those values normally come from the driver's @bind method, which does | |
2314 | * all the work of setting up the driver to match the hardware. | |
2315 | * | |
2316 | * On successful return, the gadget is ready to respond to requests from | |
2317 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
2318 | * while it was binding. That would usually be done in order to wait for | |
2319 | * some userspace participation. | |
2320 | */ | |
03e42bd5 | 2321 | int usb_composite_probe(struct usb_composite_driver *driver) |
40982be5 | 2322 | { |
ffe0b335 SAS |
2323 | struct usb_gadget_driver *gadget_driver; |
2324 | ||
2325 | if (!driver || !driver->dev || !driver->bind) | |
40982be5 DB |
2326 | return -EINVAL; |
2327 | ||
2328 | if (!driver->name) | |
2329 | driver->name = "composite"; | |
40982be5 | 2330 | |
ffe0b335 SAS |
2331 | driver->gadget_driver = composite_driver_template; |
2332 | gadget_driver = &driver->gadget_driver; | |
2333 | ||
2334 | gadget_driver->function = (char *) driver->name; | |
2335 | gadget_driver->driver.name = driver->name; | |
2336 | gadget_driver->max_speed = driver->max_speed; | |
2337 | ||
2338 | return usb_gadget_probe_driver(gadget_driver); | |
40982be5 | 2339 | } |
721e2e91 | 2340 | EXPORT_SYMBOL_GPL(usb_composite_probe); |
40982be5 DB |
2341 | |
2342 | /** | |
2343 | * usb_composite_unregister() - unregister a composite driver | |
2344 | * @driver: the driver to unregister | |
2345 | * | |
2346 | * This function is used to unregister drivers using the composite | |
2347 | * driver framework. | |
2348 | */ | |
28824b18 | 2349 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 | 2350 | { |
ffe0b335 | 2351 | usb_gadget_unregister_driver(&driver->gadget_driver); |
40982be5 | 2352 | } |
721e2e91 | 2353 | EXPORT_SYMBOL_GPL(usb_composite_unregister); |
1b9ba000 RQ |
2354 | |
2355 | /** | |
2356 | * usb_composite_setup_continue() - Continue with the control transfer | |
2357 | * @cdev: the composite device who's control transfer was kept waiting | |
2358 | * | |
2359 | * This function must be called by the USB function driver to continue | |
2360 | * with the control transfer's data/status stage in case it had requested to | |
2361 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
2362 | * can request the composite framework to delay the setup request's data/status | |
2363 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
2364 | */ | |
2365 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
2366 | { | |
2367 | int value; | |
2368 | struct usb_request *req = cdev->req; | |
2369 | unsigned long flags; | |
2370 | ||
2371 | DBG(cdev, "%s\n", __func__); | |
2372 | spin_lock_irqsave(&cdev->lock, flags); | |
2373 | ||
2374 | if (cdev->delayed_status == 0) { | |
2375 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
2376 | ||
2377 | } else if (--cdev->delayed_status == 0) { | |
2378 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
2379 | req->length = 0; | |
57943716 | 2380 | req->context = cdev; |
a7c12eaf | 2381 | value = composite_ep0_queue(cdev, req, GFP_ATOMIC); |
1b9ba000 RQ |
2382 | if (value < 0) { |
2383 | DBG(cdev, "ep_queue --> %d\n", value); | |
2384 | req->status = 0; | |
2385 | composite_setup_complete(cdev->gadget->ep0, req); | |
2386 | } | |
2387 | } | |
2388 | ||
2389 | spin_unlock_irqrestore(&cdev->lock, flags); | |
2390 | } | |
721e2e91 | 2391 | EXPORT_SYMBOL_GPL(usb_composite_setup_continue); |
1b9ba000 | 2392 | |
cc2683c3 SAS |
2393 | static char *composite_default_mfr(struct usb_gadget *gadget) |
2394 | { | |
5002c931 JG |
2395 | return kasprintf(GFP_KERNEL, "%s %s with %s", init_utsname()->sysname, |
2396 | init_utsname()->release, gadget->name); | |
cc2683c3 SAS |
2397 | } |
2398 | ||
7d16e8d3 SAS |
2399 | void usb_composite_overwrite_options(struct usb_composite_dev *cdev, |
2400 | struct usb_composite_overwrite *covr) | |
2401 | { | |
2402 | struct usb_device_descriptor *desc = &cdev->desc; | |
1cf0d264 SAS |
2403 | struct usb_gadget_strings *gstr = cdev->driver->strings[0]; |
2404 | struct usb_string *dev_str = gstr->strings; | |
7d16e8d3 SAS |
2405 | |
2406 | if (covr->idVendor) | |
2407 | desc->idVendor = cpu_to_le16(covr->idVendor); | |
2408 | ||
2409 | if (covr->idProduct) | |
2410 | desc->idProduct = cpu_to_le16(covr->idProduct); | |
2411 | ||
2412 | if (covr->bcdDevice) | |
2413 | desc->bcdDevice = cpu_to_le16(covr->bcdDevice); | |
1cf0d264 SAS |
2414 | |
2415 | if (covr->serial_number) { | |
2416 | desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id; | |
2417 | dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number; | |
2418 | } | |
03de9bf6 SAS |
2419 | if (covr->manufacturer) { |
2420 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2421 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer; | |
cc2683c3 SAS |
2422 | |
2423 | } else if (!strlen(dev_str[USB_GADGET_MANUFACTURER_IDX].s)) { | |
2424 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
2425 | cdev->def_manufacturer = composite_default_mfr(cdev->gadget); | |
2426 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = cdev->def_manufacturer; | |
03de9bf6 | 2427 | } |
2d35ee47 SAS |
2428 | |
2429 | if (covr->product) { | |
2430 | desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id; | |
2431 | dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product; | |
2432 | } | |
7d16e8d3 | 2433 | } |
721e2e91 | 2434 | EXPORT_SYMBOL_GPL(usb_composite_overwrite_options); |
d80c304b SAS |
2435 | |
2436 | MODULE_LICENSE("GPL"); | |
2437 | MODULE_AUTHOR("David Brownell"); |