]>
Commit | Line | Data |
---|---|---|
40982be5 DB |
1 | /* |
2 | * composite.c - infrastructure for Composite USB Gadgets | |
3 | * | |
4 | * Copyright (C) 2006-2008 David Brownell | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
40982be5 DB |
10 | */ |
11 | ||
12 | /* #define VERBOSE_DEBUG */ | |
13 | ||
14 | #include <linux/kallsyms.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
6eb0de82 | 17 | #include <linux/module.h> |
40982be5 | 18 | #include <linux/device.h> |
ad1a8102 | 19 | #include <linux/utsname.h> |
40982be5 DB |
20 | |
21 | #include <linux/usb/composite.h> | |
bdb64d72 | 22 | #include <asm/unaligned.h> |
40982be5 DB |
23 | |
24 | /* | |
25 | * The code in this file is utility code, used to build a gadget driver | |
26 | * from one or more "function" drivers, one or more "configuration" | |
27 | * objects, and a "usb_composite_driver" by gluing them together along | |
28 | * with the relevant device-wide data. | |
29 | */ | |
30 | ||
31 | /* big enough to hold our biggest descriptor */ | |
dd0543ec | 32 | #define USB_BUFSIZ 1024 |
40982be5 DB |
33 | |
34 | static struct usb_composite_driver *composite; | |
07a18bd7 | 35 | static int (*composite_gadget_bind)(struct usb_composite_dev *cdev); |
40982be5 | 36 | |
25985edc | 37 | /* Some systems will need runtime overrides for the product identifiers |
40982be5 DB |
38 | * published in the device descriptor, either numbers or strings or both. |
39 | * String parameters are in UTF-8 (superset of ASCII's 7 bit characters). | |
40 | */ | |
41 | ||
42 | static ushort idVendor; | |
43 | module_param(idVendor, ushort, 0); | |
44 | MODULE_PARM_DESC(idVendor, "USB Vendor ID"); | |
45 | ||
46 | static ushort idProduct; | |
47 | module_param(idProduct, ushort, 0); | |
48 | MODULE_PARM_DESC(idProduct, "USB Product ID"); | |
49 | ||
50 | static ushort bcdDevice; | |
51 | module_param(bcdDevice, ushort, 0); | |
52 | MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); | |
53 | ||
54 | static char *iManufacturer; | |
55 | module_param(iManufacturer, charp, 0); | |
56 | MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); | |
57 | ||
58 | static char *iProduct; | |
59 | module_param(iProduct, charp, 0); | |
60 | MODULE_PARM_DESC(iProduct, "USB Product string"); | |
61 | ||
62 | static char *iSerialNumber; | |
63 | module_param(iSerialNumber, charp, 0); | |
64 | MODULE_PARM_DESC(iSerialNumber, "SerialNumber string"); | |
65 | ||
ad1a8102 MN |
66 | static char composite_manufacturer[50]; |
67 | ||
40982be5 | 68 | /*-------------------------------------------------------------------------*/ |
48767a4e TB |
69 | /** |
70 | * next_ep_desc() - advance to the next EP descriptor | |
71 | * @t: currect pointer within descriptor array | |
72 | * | |
73 | * Return: next EP descriptor or NULL | |
74 | * | |
75 | * Iterate over @t until either EP descriptor found or | |
76 | * NULL (that indicates end of list) encountered | |
77 | */ | |
78 | static struct usb_descriptor_header** | |
79 | next_ep_desc(struct usb_descriptor_header **t) | |
80 | { | |
81 | for (; *t; t++) { | |
82 | if ((*t)->bDescriptorType == USB_DT_ENDPOINT) | |
83 | return t; | |
84 | } | |
85 | return NULL; | |
86 | } | |
87 | ||
88 | /* | |
89 | * for_each_ep_desc()- iterate over endpoint descriptors in the | |
90 | * descriptors list | |
91 | * @start: pointer within descriptor array. | |
92 | * @ep_desc: endpoint descriptor to use as the loop cursor | |
93 | */ | |
94 | #define for_each_ep_desc(start, ep_desc) \ | |
95 | for (ep_desc = next_ep_desc(start); \ | |
96 | ep_desc; ep_desc = next_ep_desc(ep_desc+1)) | |
97 | ||
98 | /** | |
99 | * config_ep_by_speed() - configures the given endpoint | |
100 | * according to gadget speed. | |
101 | * @g: pointer to the gadget | |
102 | * @f: usb function | |
103 | * @_ep: the endpoint to configure | |
104 | * | |
105 | * Return: error code, 0 on success | |
106 | * | |
107 | * This function chooses the right descriptors for a given | |
108 | * endpoint according to gadget speed and saves it in the | |
109 | * endpoint desc field. If the endpoint already has a descriptor | |
110 | * assigned to it - overwrites it with currently corresponding | |
111 | * descriptor. The endpoint maxpacket field is updated according | |
112 | * to the chosen descriptor. | |
113 | * Note: the supplied function should hold all the descriptors | |
114 | * for supported speeds | |
115 | */ | |
116 | int config_ep_by_speed(struct usb_gadget *g, | |
117 | struct usb_function *f, | |
118 | struct usb_ep *_ep) | |
119 | { | |
120 | struct usb_endpoint_descriptor *chosen_desc = NULL; | |
121 | struct usb_descriptor_header **speed_desc = NULL; | |
122 | ||
bdb64d72 TB |
123 | struct usb_ss_ep_comp_descriptor *comp_desc = NULL; |
124 | int want_comp_desc = 0; | |
125 | ||
48767a4e TB |
126 | struct usb_descriptor_header **d_spd; /* cursor for speed desc */ |
127 | ||
128 | if (!g || !f || !_ep) | |
129 | return -EIO; | |
130 | ||
131 | /* select desired speed */ | |
132 | switch (g->speed) { | |
bdb64d72 TB |
133 | case USB_SPEED_SUPER: |
134 | if (gadget_is_superspeed(g)) { | |
135 | speed_desc = f->ss_descriptors; | |
136 | want_comp_desc = 1; | |
137 | break; | |
138 | } | |
139 | /* else: Fall trough */ | |
48767a4e TB |
140 | case USB_SPEED_HIGH: |
141 | if (gadget_is_dualspeed(g)) { | |
142 | speed_desc = f->hs_descriptors; | |
143 | break; | |
144 | } | |
145 | /* else: fall through */ | |
146 | default: | |
147 | speed_desc = f->descriptors; | |
148 | } | |
149 | /* find descriptors */ | |
150 | for_each_ep_desc(speed_desc, d_spd) { | |
151 | chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; | |
152 | if (chosen_desc->bEndpointAddress == _ep->address) | |
153 | goto ep_found; | |
154 | } | |
155 | return -EIO; | |
156 | ||
157 | ep_found: | |
158 | /* commit results */ | |
29cc8897 | 159 | _ep->maxpacket = usb_endpoint_maxp(chosen_desc); |
48767a4e | 160 | _ep->desc = chosen_desc; |
bdb64d72 TB |
161 | _ep->comp_desc = NULL; |
162 | _ep->maxburst = 0; | |
163 | _ep->mult = 0; | |
164 | if (!want_comp_desc) | |
165 | return 0; | |
48767a4e | 166 | |
bdb64d72 TB |
167 | /* |
168 | * Companion descriptor should follow EP descriptor | |
169 | * USB 3.0 spec, #9.6.7 | |
170 | */ | |
171 | comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); | |
172 | if (!comp_desc || | |
173 | (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) | |
174 | return -EIO; | |
175 | _ep->comp_desc = comp_desc; | |
176 | if (g->speed == USB_SPEED_SUPER) { | |
177 | switch (usb_endpoint_type(_ep->desc)) { | |
178 | case USB_ENDPOINT_XFER_BULK: | |
179 | case USB_ENDPOINT_XFER_INT: | |
180 | _ep->maxburst = comp_desc->bMaxBurst; | |
181 | break; | |
182 | case USB_ENDPOINT_XFER_ISOC: | |
183 | /* mult: bits 1:0 of bmAttributes */ | |
184 | _ep->mult = comp_desc->bmAttributes & 0x3; | |
185 | break; | |
186 | default: | |
187 | /* Do nothing for control endpoints */ | |
188 | break; | |
189 | } | |
190 | } | |
48767a4e TB |
191 | return 0; |
192 | } | |
40982be5 DB |
193 | |
194 | /** | |
195 | * usb_add_function() - add a function to a configuration | |
196 | * @config: the configuration | |
197 | * @function: the function being added | |
198 | * Context: single threaded during gadget setup | |
199 | * | |
200 | * After initialization, each configuration must have one or more | |
201 | * functions added to it. Adding a function involves calling its @bind() | |
202 | * method to allocate resources such as interface and string identifiers | |
203 | * and endpoints. | |
204 | * | |
205 | * This function returns the value of the function's bind(), which is | |
206 | * zero for success else a negative errno value. | |
207 | */ | |
28824b18 | 208 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
209 | struct usb_function *function) |
210 | { | |
211 | int value = -EINVAL; | |
212 | ||
213 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
214 | function->name, function, | |
215 | config->label, config); | |
216 | ||
217 | if (!function->set_alt || !function->disable) | |
218 | goto done; | |
219 | ||
220 | function->config = config; | |
221 | list_add_tail(&function->list, &config->functions); | |
222 | ||
223 | /* REVISIT *require* function->bind? */ | |
224 | if (function->bind) { | |
225 | value = function->bind(config, function); | |
226 | if (value < 0) { | |
227 | list_del(&function->list); | |
228 | function->config = NULL; | |
229 | } | |
230 | } else | |
231 | value = 0; | |
232 | ||
233 | /* We allow configurations that don't work at both speeds. | |
234 | * If we run into a lowspeed Linux system, treat it the same | |
235 | * as full speed ... it's the function drivers that will need | |
236 | * to avoid bulk and ISO transfers. | |
237 | */ | |
238 | if (!config->fullspeed && function->descriptors) | |
239 | config->fullspeed = true; | |
240 | if (!config->highspeed && function->hs_descriptors) | |
241 | config->highspeed = true; | |
bdb64d72 TB |
242 | if (!config->superspeed && function->ss_descriptors) |
243 | config->superspeed = true; | |
40982be5 DB |
244 | |
245 | done: | |
246 | if (value) | |
247 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
248 | function->name, function, value); | |
249 | return value; | |
250 | } | |
251 | ||
60beed95 DB |
252 | /** |
253 | * usb_function_deactivate - prevent function and gadget enumeration | |
254 | * @function: the function that isn't yet ready to respond | |
255 | * | |
256 | * Blocks response of the gadget driver to host enumeration by | |
257 | * preventing the data line pullup from being activated. This is | |
258 | * normally called during @bind() processing to change from the | |
259 | * initial "ready to respond" state, or when a required resource | |
260 | * becomes available. | |
261 | * | |
262 | * For example, drivers that serve as a passthrough to a userspace | |
263 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
264 | * MTP, or print server) is ready to handle host requests. | |
265 | * | |
266 | * Not all systems support software control of their USB peripheral | |
267 | * data pullups. | |
268 | * | |
269 | * Returns zero on success, else negative errno. | |
270 | */ | |
271 | int usb_function_deactivate(struct usb_function *function) | |
272 | { | |
273 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 274 | unsigned long flags; |
60beed95 DB |
275 | int status = 0; |
276 | ||
b2bdf3a7 | 277 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
278 | |
279 | if (cdev->deactivations == 0) | |
280 | status = usb_gadget_disconnect(cdev->gadget); | |
281 | if (status == 0) | |
282 | cdev->deactivations++; | |
283 | ||
b2bdf3a7 | 284 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
285 | return status; |
286 | } | |
287 | ||
288 | /** | |
289 | * usb_function_activate - allow function and gadget enumeration | |
290 | * @function: function on which usb_function_activate() was called | |
291 | * | |
292 | * Reverses effect of usb_function_deactivate(). If no more functions | |
293 | * are delaying their activation, the gadget driver will respond to | |
294 | * host enumeration procedures. | |
295 | * | |
296 | * Returns zero on success, else negative errno. | |
297 | */ | |
298 | int usb_function_activate(struct usb_function *function) | |
299 | { | |
300 | struct usb_composite_dev *cdev = function->config->cdev; | |
301 | int status = 0; | |
302 | ||
303 | spin_lock(&cdev->lock); | |
304 | ||
305 | if (WARN_ON(cdev->deactivations == 0)) | |
306 | status = -EINVAL; | |
307 | else { | |
308 | cdev->deactivations--; | |
309 | if (cdev->deactivations == 0) | |
310 | status = usb_gadget_connect(cdev->gadget); | |
311 | } | |
312 | ||
313 | spin_unlock(&cdev->lock); | |
314 | return status; | |
315 | } | |
316 | ||
40982be5 DB |
317 | /** |
318 | * usb_interface_id() - allocate an unused interface ID | |
319 | * @config: configuration associated with the interface | |
320 | * @function: function handling the interface | |
321 | * Context: single threaded during gadget setup | |
322 | * | |
323 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
324 | * allocate new interface IDs. The function driver will then store that | |
325 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 326 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
327 | * particularly changing its altsetting via set_alt(). There may |
328 | * also be class-specific or vendor-specific requests to handle. | |
329 | * | |
330 | * All interface identifier should be allocated using this routine, to | |
331 | * ensure that for example different functions don't wrongly assign | |
332 | * different meanings to the same identifier. Note that since interface | |
25985edc | 333 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
334 | * one configuration (or more than once in a given configuration) need |
335 | * multiple versions of the relevant descriptors. | |
336 | * | |
337 | * Returns the interface ID which was allocated; or -ENODEV if no | |
338 | * more interface IDs can be allocated. | |
339 | */ | |
28824b18 | 340 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
341 | struct usb_function *function) |
342 | { | |
343 | unsigned id = config->next_interface_id; | |
344 | ||
345 | if (id < MAX_CONFIG_INTERFACES) { | |
346 | config->interface[id] = function; | |
347 | config->next_interface_id = id + 1; | |
348 | return id; | |
349 | } | |
350 | return -ENODEV; | |
351 | } | |
352 | ||
353 | static int config_buf(struct usb_configuration *config, | |
354 | enum usb_device_speed speed, void *buf, u8 type) | |
355 | { | |
356 | struct usb_config_descriptor *c = buf; | |
357 | void *next = buf + USB_DT_CONFIG_SIZE; | |
358 | int len = USB_BUFSIZ - USB_DT_CONFIG_SIZE; | |
359 | struct usb_function *f; | |
360 | int status; | |
361 | ||
362 | /* write the config descriptor */ | |
363 | c = buf; | |
364 | c->bLength = USB_DT_CONFIG_SIZE; | |
365 | c->bDescriptorType = type; | |
366 | /* wTotalLength is written later */ | |
367 | c->bNumInterfaces = config->next_interface_id; | |
368 | c->bConfigurationValue = config->bConfigurationValue; | |
369 | c->iConfiguration = config->iConfiguration; | |
370 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
36e893d2 | 371 | c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2); |
40982be5 DB |
372 | |
373 | /* There may be e.g. OTG descriptors */ | |
374 | if (config->descriptors) { | |
375 | status = usb_descriptor_fillbuf(next, len, | |
376 | config->descriptors); | |
377 | if (status < 0) | |
378 | return status; | |
379 | len -= status; | |
380 | next += status; | |
381 | } | |
382 | ||
383 | /* add each function's descriptors */ | |
384 | list_for_each_entry(f, &config->functions, list) { | |
385 | struct usb_descriptor_header **descriptors; | |
386 | ||
bdb64d72 TB |
387 | switch (speed) { |
388 | case USB_SPEED_SUPER: | |
389 | descriptors = f->ss_descriptors; | |
390 | break; | |
391 | case USB_SPEED_HIGH: | |
40982be5 | 392 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
393 | break; |
394 | default: | |
40982be5 | 395 | descriptors = f->descriptors; |
bdb64d72 TB |
396 | } |
397 | ||
40982be5 DB |
398 | if (!descriptors) |
399 | continue; | |
400 | status = usb_descriptor_fillbuf(next, len, | |
401 | (const struct usb_descriptor_header **) descriptors); | |
402 | if (status < 0) | |
403 | return status; | |
404 | len -= status; | |
405 | next += status; | |
406 | } | |
407 | ||
408 | len = next - buf; | |
409 | c->wTotalLength = cpu_to_le16(len); | |
410 | return len; | |
411 | } | |
412 | ||
413 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
414 | { | |
415 | struct usb_gadget *gadget = cdev->gadget; | |
416 | struct usb_configuration *c; | |
417 | u8 type = w_value >> 8; | |
418 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
419 | ||
bdb64d72 TB |
420 | if (gadget->speed == USB_SPEED_SUPER) |
421 | speed = gadget->speed; | |
422 | else if (gadget_is_dualspeed(gadget)) { | |
423 | int hs = 0; | |
40982be5 DB |
424 | if (gadget->speed == USB_SPEED_HIGH) |
425 | hs = 1; | |
426 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
427 | hs = !hs; | |
428 | if (hs) | |
429 | speed = USB_SPEED_HIGH; | |
430 | ||
431 | } | |
432 | ||
433 | /* This is a lookup by config *INDEX* */ | |
434 | w_value &= 0xff; | |
435 | list_for_each_entry(c, &cdev->configs, list) { | |
436 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
437 | switch (speed) { |
438 | case USB_SPEED_SUPER: | |
439 | if (!c->superspeed) | |
440 | continue; | |
441 | break; | |
442 | case USB_SPEED_HIGH: | |
40982be5 DB |
443 | if (!c->highspeed) |
444 | continue; | |
bdb64d72 TB |
445 | break; |
446 | default: | |
40982be5 DB |
447 | if (!c->fullspeed) |
448 | continue; | |
449 | } | |
bdb64d72 | 450 | |
40982be5 DB |
451 | if (w_value == 0) |
452 | return config_buf(c, speed, cdev->req->buf, type); | |
453 | w_value--; | |
454 | } | |
455 | return -EINVAL; | |
456 | } | |
457 | ||
458 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
459 | { | |
460 | struct usb_gadget *gadget = cdev->gadget; | |
461 | struct usb_configuration *c; | |
462 | unsigned count = 0; | |
463 | int hs = 0; | |
bdb64d72 | 464 | int ss = 0; |
40982be5 DB |
465 | |
466 | if (gadget_is_dualspeed(gadget)) { | |
467 | if (gadget->speed == USB_SPEED_HIGH) | |
468 | hs = 1; | |
bdb64d72 TB |
469 | if (gadget->speed == USB_SPEED_SUPER) |
470 | ss = 1; | |
40982be5 DB |
471 | if (type == USB_DT_DEVICE_QUALIFIER) |
472 | hs = !hs; | |
473 | } | |
474 | list_for_each_entry(c, &cdev->configs, list) { | |
475 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
476 | if (ss) { |
477 | if (!c->superspeed) | |
478 | continue; | |
479 | } else if (hs) { | |
40982be5 DB |
480 | if (!c->highspeed) |
481 | continue; | |
482 | } else { | |
483 | if (!c->fullspeed) | |
484 | continue; | |
485 | } | |
486 | count++; | |
487 | } | |
488 | return count; | |
489 | } | |
490 | ||
bdb64d72 TB |
491 | /** |
492 | * bos_desc() - prepares the BOS descriptor. | |
493 | * @cdev: pointer to usb_composite device to generate the bos | |
494 | * descriptor for | |
495 | * | |
496 | * This function generates the BOS (Binary Device Object) | |
497 | * descriptor and its device capabilities descriptors. The BOS | |
498 | * descriptor should be supported by a SuperSpeed device. | |
499 | */ | |
500 | static int bos_desc(struct usb_composite_dev *cdev) | |
501 | { | |
502 | struct usb_ext_cap_descriptor *usb_ext; | |
503 | struct usb_ss_cap_descriptor *ss_cap; | |
504 | struct usb_dcd_config_params dcd_config_params; | |
505 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
506 | ||
507 | bos->bLength = USB_DT_BOS_SIZE; | |
508 | bos->bDescriptorType = USB_DT_BOS; | |
509 | ||
510 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
511 | bos->bNumDeviceCaps = 0; | |
512 | ||
513 | /* | |
514 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
515 | * and shall support LPM when operating in USB2.0 HS mode. | |
516 | */ | |
517 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
518 | bos->bNumDeviceCaps++; | |
519 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
520 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
521 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
522 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
523 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT); | |
524 | ||
525 | /* | |
526 | * The Superspeed USB Capability descriptor shall be implemented by all | |
527 | * SuperSpeed devices. | |
528 | */ | |
529 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
530 | bos->bNumDeviceCaps++; | |
531 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
532 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
533 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
534 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
535 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
536 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
537 | USB_FULL_SPEED_OPERATION | | |
538 | USB_HIGH_SPEED_OPERATION | | |
539 | USB_5GBPS_OPERATION); | |
540 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
541 | ||
542 | /* Get Controller configuration */ | |
543 | if (cdev->gadget->ops->get_config_params) | |
544 | cdev->gadget->ops->get_config_params(&dcd_config_params); | |
545 | else { | |
089b837a | 546 | dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; |
bdb64d72 | 547 | dcd_config_params.bU2DevExitLat = |
089b837a | 548 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); |
bdb64d72 TB |
549 | } |
550 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
551 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
552 | ||
553 | return le16_to_cpu(bos->wTotalLength); | |
554 | } | |
555 | ||
40982be5 DB |
556 | static void device_qual(struct usb_composite_dev *cdev) |
557 | { | |
558 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
559 | ||
560 | qual->bLength = sizeof(*qual); | |
561 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
562 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
563 | qual->bcdUSB = cdev->desc.bcdUSB; | |
564 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
565 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
566 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
567 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 568 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 569 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 570 | qual->bRESERVED = 0; |
40982be5 DB |
571 | } |
572 | ||
573 | /*-------------------------------------------------------------------------*/ | |
574 | ||
575 | static void reset_config(struct usb_composite_dev *cdev) | |
576 | { | |
577 | struct usb_function *f; | |
578 | ||
579 | DBG(cdev, "reset config\n"); | |
580 | ||
581 | list_for_each_entry(f, &cdev->config->functions, list) { | |
582 | if (f->disable) | |
583 | f->disable(f); | |
5242658d LP |
584 | |
585 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
586 | } |
587 | cdev->config = NULL; | |
588 | } | |
589 | ||
590 | static int set_config(struct usb_composite_dev *cdev, | |
591 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
592 | { | |
593 | struct usb_gadget *gadget = cdev->gadget; | |
594 | struct usb_configuration *c = NULL; | |
595 | int result = -EINVAL; | |
596 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
597 | int tmp; | |
598 | ||
40982be5 DB |
599 | if (number) { |
600 | list_for_each_entry(c, &cdev->configs, list) { | |
601 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
602 | /* |
603 | * We disable the FDs of the previous | |
604 | * configuration only if the new configuration | |
605 | * is a valid one | |
606 | */ | |
607 | if (cdev->config) | |
608 | reset_config(cdev); | |
40982be5 DB |
609 | result = 0; |
610 | break; | |
611 | } | |
612 | } | |
613 | if (result < 0) | |
614 | goto done; | |
bdb64d72 TB |
615 | } else { /* Zero configuration value - need to reset the config */ |
616 | if (cdev->config) | |
617 | reset_config(cdev); | |
40982be5 | 618 | result = 0; |
bdb64d72 | 619 | } |
40982be5 | 620 | |
e538dfda MN |
621 | INFO(cdev, "%s config #%d: %s\n", |
622 | usb_speed_string(gadget->speed), | |
623 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
624 | |
625 | if (!c) | |
626 | goto done; | |
627 | ||
628 | cdev->config = c; | |
629 | ||
630 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
631 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
632 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 633 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
634 | |
635 | if (!f) | |
636 | break; | |
637 | ||
5242658d LP |
638 | /* |
639 | * Record which endpoints are used by the function. This is used | |
640 | * to dispatch control requests targeted at that endpoint to the | |
641 | * function's setup callback instead of the current | |
642 | * configuration's setup callback. | |
643 | */ | |
bdb64d72 TB |
644 | switch (gadget->speed) { |
645 | case USB_SPEED_SUPER: | |
646 | descriptors = f->ss_descriptors; | |
647 | break; | |
648 | case USB_SPEED_HIGH: | |
5242658d | 649 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
650 | break; |
651 | default: | |
5242658d | 652 | descriptors = f->descriptors; |
bdb64d72 | 653 | } |
5242658d LP |
654 | |
655 | for (; *descriptors; ++descriptors) { | |
656 | struct usb_endpoint_descriptor *ep; | |
657 | int addr; | |
658 | ||
659 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
660 | continue; | |
661 | ||
662 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
663 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
664 | | (ep->bEndpointAddress & 0x0f); | |
665 | set_bit(addr, f->endpoints); | |
666 | } | |
667 | ||
40982be5 DB |
668 | result = f->set_alt(f, tmp, 0); |
669 | if (result < 0) { | |
670 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
671 | tmp, f->name, f, result); | |
672 | ||
673 | reset_config(cdev); | |
674 | goto done; | |
675 | } | |
1b9ba000 RQ |
676 | |
677 | if (result == USB_GADGET_DELAYED_STATUS) { | |
678 | DBG(cdev, | |
679 | "%s: interface %d (%s) requested delayed status\n", | |
680 | __func__, tmp, f->name); | |
681 | cdev->delayed_status++; | |
682 | DBG(cdev, "delayed_status count %d\n", | |
683 | cdev->delayed_status); | |
684 | } | |
40982be5 DB |
685 | } |
686 | ||
687 | /* when we return, be sure our power usage is valid */ | |
36e893d2 | 688 | power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
689 | done: |
690 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
691 | if (result >= 0 && cdev->delayed_status) |
692 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
693 | return result; |
694 | } | |
695 | ||
696 | /** | |
697 | * usb_add_config() - add a configuration to a device. | |
698 | * @cdev: wraps the USB gadget | |
699 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 700 | * @bind: the configuration's bind function |
40982be5 DB |
701 | * Context: single threaded during gadget setup |
702 | * | |
c9bfff9c | 703 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
704 | * add each of the configurations it supports, using this routine. |
705 | * | |
c9bfff9c | 706 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
707 | * is zero for success else a negative errno value. Binding configurations |
708 | * assigns global resources including string IDs, and per-configuration | |
709 | * resources such as interface IDs and endpoints. | |
710 | */ | |
28824b18 | 711 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
712 | struct usb_configuration *config, |
713 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
714 | { |
715 | int status = -EINVAL; | |
716 | struct usb_configuration *c; | |
717 | ||
718 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
719 | config->bConfigurationValue, | |
720 | config->label, config); | |
721 | ||
c9bfff9c | 722 | if (!config->bConfigurationValue || !bind) |
40982be5 DB |
723 | goto done; |
724 | ||
725 | /* Prevent duplicate configuration identifiers */ | |
726 | list_for_each_entry(c, &cdev->configs, list) { | |
727 | if (c->bConfigurationValue == config->bConfigurationValue) { | |
728 | status = -EBUSY; | |
729 | goto done; | |
730 | } | |
731 | } | |
732 | ||
733 | config->cdev = cdev; | |
734 | list_add_tail(&config->list, &cdev->configs); | |
735 | ||
736 | INIT_LIST_HEAD(&config->functions); | |
737 | config->next_interface_id = 0; | |
738 | ||
c9bfff9c | 739 | status = bind(config); |
40982be5 DB |
740 | if (status < 0) { |
741 | list_del(&config->list); | |
742 | config->cdev = NULL; | |
743 | } else { | |
744 | unsigned i; | |
745 | ||
bdb64d72 | 746 | DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", |
40982be5 | 747 | config->bConfigurationValue, config, |
bdb64d72 | 748 | config->superspeed ? " super" : "", |
40982be5 DB |
749 | config->highspeed ? " high" : "", |
750 | config->fullspeed | |
751 | ? (gadget_is_dualspeed(cdev->gadget) | |
752 | ? " full" | |
753 | : " full/low") | |
754 | : ""); | |
755 | ||
756 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
757 | struct usb_function *f = config->interface[i]; | |
758 | ||
759 | if (!f) | |
760 | continue; | |
761 | DBG(cdev, " interface %d = %s/%p\n", | |
762 | i, f->name, f); | |
763 | } | |
764 | } | |
765 | ||
c9bfff9c | 766 | /* set_alt(), or next bind(), sets up |
40982be5 DB |
767 | * ep->driver_data as needed. |
768 | */ | |
769 | usb_ep_autoconfig_reset(cdev->gadget); | |
770 | ||
771 | done: | |
772 | if (status) | |
773 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
774 | config->bConfigurationValue, status); | |
775 | return status; | |
776 | } | |
777 | ||
778 | /*-------------------------------------------------------------------------*/ | |
779 | ||
780 | /* We support strings in multiple languages ... string descriptor zero | |
781 | * says which languages are supported. The typical case will be that | |
782 | * only one language (probably English) is used, with I18N handled on | |
783 | * the host side. | |
784 | */ | |
785 | ||
786 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
787 | { | |
788 | const struct usb_gadget_strings *s; | |
789 | u16 language; | |
790 | __le16 *tmp; | |
791 | ||
792 | while (*sp) { | |
793 | s = *sp; | |
794 | language = cpu_to_le16(s->language); | |
795 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
796 | if (*tmp == language) | |
797 | goto repeat; | |
798 | } | |
799 | *tmp++ = language; | |
800 | repeat: | |
801 | sp++; | |
802 | } | |
803 | } | |
804 | ||
805 | static int lookup_string( | |
806 | struct usb_gadget_strings **sp, | |
807 | void *buf, | |
808 | u16 language, | |
809 | int id | |
810 | ) | |
811 | { | |
812 | struct usb_gadget_strings *s; | |
813 | int value; | |
814 | ||
815 | while (*sp) { | |
816 | s = *sp++; | |
817 | if (s->language != language) | |
818 | continue; | |
819 | value = usb_gadget_get_string(s, id, buf); | |
820 | if (value > 0) | |
821 | return value; | |
822 | } | |
823 | return -EINVAL; | |
824 | } | |
825 | ||
826 | static int get_string(struct usb_composite_dev *cdev, | |
827 | void *buf, u16 language, int id) | |
828 | { | |
829 | struct usb_configuration *c; | |
830 | struct usb_function *f; | |
831 | int len; | |
ad1a8102 | 832 | const char *str; |
40982be5 DB |
833 | |
834 | /* Yes, not only is USB's I18N support probably more than most | |
835 | * folk will ever care about ... also, it's all supported here. | |
836 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
837 | */ | |
838 | ||
839 | /* 0 == report all available language codes */ | |
840 | if (id == 0) { | |
841 | struct usb_string_descriptor *s = buf; | |
842 | struct usb_gadget_strings **sp; | |
843 | ||
844 | memset(s, 0, 256); | |
845 | s->bDescriptorType = USB_DT_STRING; | |
846 | ||
847 | sp = composite->strings; | |
848 | if (sp) | |
849 | collect_langs(sp, s->wData); | |
850 | ||
851 | list_for_each_entry(c, &cdev->configs, list) { | |
852 | sp = c->strings; | |
853 | if (sp) | |
854 | collect_langs(sp, s->wData); | |
855 | ||
856 | list_for_each_entry(f, &c->functions, list) { | |
857 | sp = f->strings; | |
858 | if (sp) | |
859 | collect_langs(sp, s->wData); | |
860 | } | |
861 | } | |
862 | ||
417b57b3 | 863 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
864 | continue; |
865 | if (!len) | |
866 | return -EINVAL; | |
867 | ||
868 | s->bLength = 2 * (len + 1); | |
869 | return s->bLength; | |
870 | } | |
871 | ||
ad1a8102 MN |
872 | /* Otherwise, look up and return a specified string. First |
873 | * check if the string has not been overridden. | |
874 | */ | |
875 | if (cdev->manufacturer_override == id) | |
876 | str = iManufacturer ?: composite->iManufacturer ?: | |
877 | composite_manufacturer; | |
878 | else if (cdev->product_override == id) | |
879 | str = iProduct ?: composite->iProduct; | |
880 | else if (cdev->serial_override == id) | |
881 | str = iSerialNumber; | |
882 | else | |
883 | str = NULL; | |
884 | if (str) { | |
885 | struct usb_gadget_strings strings = { | |
886 | .language = language, | |
887 | .strings = &(struct usb_string) { 0xff, str } | |
888 | }; | |
889 | return usb_gadget_get_string(&strings, 0xff, buf); | |
890 | } | |
891 | ||
892 | /* String IDs are device-scoped, so we look up each string | |
893 | * table we're told about. These lookups are infrequent; | |
894 | * simpler-is-better here. | |
40982be5 DB |
895 | */ |
896 | if (composite->strings) { | |
897 | len = lookup_string(composite->strings, buf, language, id); | |
898 | if (len > 0) | |
899 | return len; | |
900 | } | |
901 | list_for_each_entry(c, &cdev->configs, list) { | |
902 | if (c->strings) { | |
903 | len = lookup_string(c->strings, buf, language, id); | |
904 | if (len > 0) | |
905 | return len; | |
906 | } | |
907 | list_for_each_entry(f, &c->functions, list) { | |
908 | if (!f->strings) | |
909 | continue; | |
910 | len = lookup_string(f->strings, buf, language, id); | |
911 | if (len > 0) | |
912 | return len; | |
913 | } | |
914 | } | |
915 | return -EINVAL; | |
916 | } | |
917 | ||
918 | /** | |
919 | * usb_string_id() - allocate an unused string ID | |
920 | * @cdev: the device whose string descriptor IDs are being allocated | |
921 | * Context: single threaded during gadget setup | |
922 | * | |
923 | * @usb_string_id() is called from bind() callbacks to allocate | |
924 | * string IDs. Drivers for functions, configurations, or gadgets will | |
925 | * then store that ID in the appropriate descriptors and string table. | |
926 | * | |
f2adc4f8 MN |
927 | * All string identifier should be allocated using this, |
928 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
929 | * that for example different functions don't wrongly assign different | |
930 | * meanings to the same identifier. | |
40982be5 | 931 | */ |
28824b18 | 932 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
933 | { |
934 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
935 | /* string id 0 is reserved by USB spec for list of |
936 | * supported languages */ | |
937 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
938 | cdev->next_string_id++; |
939 | return cdev->next_string_id; | |
940 | } | |
941 | return -ENODEV; | |
942 | } | |
943 | ||
f2adc4f8 MN |
944 | /** |
945 | * usb_string_ids() - allocate unused string IDs in batch | |
946 | * @cdev: the device whose string descriptor IDs are being allocated | |
947 | * @str: an array of usb_string objects to assign numbers to | |
948 | * Context: single threaded during gadget setup | |
949 | * | |
950 | * @usb_string_ids() is called from bind() callbacks to allocate | |
951 | * string IDs. Drivers for functions, configurations, or gadgets will | |
952 | * then copy IDs from the string table to the appropriate descriptors | |
953 | * and string table for other languages. | |
954 | * | |
955 | * All string identifier should be allocated using this, | |
956 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
957 | * example different functions don't wrongly assign different meanings | |
958 | * to the same identifier. | |
959 | */ | |
960 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
961 | { | |
962 | int next = cdev->next_string_id; | |
963 | ||
964 | for (; str->s; ++str) { | |
965 | if (unlikely(next >= 254)) | |
966 | return -ENODEV; | |
967 | str->id = ++next; | |
968 | } | |
969 | ||
970 | cdev->next_string_id = next; | |
971 | ||
972 | return 0; | |
973 | } | |
974 | ||
975 | /** | |
976 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 977 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
978 | * @n: number of string IDs to allocate |
979 | * Context: single threaded during gadget setup | |
980 | * | |
981 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 982 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
983 | * is, returns last requested ID which is now very useful information. |
984 | * | |
985 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
986 | * string IDs. Drivers for functions, configurations, or gadgets will | |
987 | * then store that ID in the appropriate descriptors and string table. | |
988 | * | |
989 | * All string identifier should be allocated using this, | |
990 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
991 | * example different functions don't wrongly assign different meanings | |
992 | * to the same identifier. | |
993 | */ | |
994 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
995 | { | |
996 | unsigned next = c->next_string_id; | |
997 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
998 | return -ENODEV; | |
999 | c->next_string_id += n; | |
1000 | return next + 1; | |
1001 | } | |
1002 | ||
1003 | ||
40982be5 DB |
1004 | /*-------------------------------------------------------------------------*/ |
1005 | ||
1006 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1007 | { | |
1008 | if (req->status || req->actual != req->length) | |
1009 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1010 | "setup complete --> %d, %d/%d\n", | |
1011 | req->status, req->actual, req->length); | |
1012 | } | |
1013 | ||
1014 | /* | |
1015 | * The setup() callback implements all the ep0 functionality that's | |
1016 | * not handled lower down, in hardware or the hardware driver(like | |
1017 | * device and endpoint feature flags, and their status). It's all | |
1018 | * housekeeping for the gadget function we're implementing. Most of | |
1019 | * the work is in config and function specific setup. | |
1020 | */ | |
1021 | static int | |
1022 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) | |
1023 | { | |
1024 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1025 | struct usb_request *req = cdev->req; | |
1026 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1027 | int status = 0; |
40982be5 | 1028 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1029 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1030 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1031 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1032 | struct usb_function *f = NULL; | |
5242658d | 1033 | u8 endp; |
40982be5 DB |
1034 | |
1035 | /* partial re-init of the response message; the function or the | |
1036 | * gadget might need to intercept e.g. a control-OUT completion | |
1037 | * when we delegate to it. | |
1038 | */ | |
1039 | req->zero = 0; | |
1040 | req->complete = composite_setup_complete; | |
2edb11cb | 1041 | req->length = 0; |
40982be5 DB |
1042 | gadget->ep0->driver_data = cdev; |
1043 | ||
1044 | switch (ctrl->bRequest) { | |
1045 | ||
1046 | /* we handle all standard USB descriptors */ | |
1047 | case USB_REQ_GET_DESCRIPTOR: | |
1048 | if (ctrl->bRequestType != USB_DIR_IN) | |
1049 | goto unknown; | |
1050 | switch (w_value >> 8) { | |
1051 | ||
1052 | case USB_DT_DEVICE: | |
1053 | cdev->desc.bNumConfigurations = | |
1054 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1055 | cdev->desc.bMaxPacketSize0 = |
1056 | cdev->gadget->ep0->maxpacket; | |
1057 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1058 | if (gadget->speed >= USB_SPEED_SUPER) { |
bdb64d72 | 1059 | cdev->desc.bcdUSB = cpu_to_le16(0x0300); |
a8f21156 SAS |
1060 | cdev->desc.bMaxPacketSize0 = 9; |
1061 | } else { | |
bdb64d72 | 1062 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1063 | } |
bdb64d72 TB |
1064 | } |
1065 | ||
40982be5 DB |
1066 | value = min(w_length, (u16) sizeof cdev->desc); |
1067 | memcpy(req->buf, &cdev->desc, value); | |
1068 | break; | |
1069 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1070 | if (!gadget_is_dualspeed(gadget) || |
1071 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1072 | break; |
1073 | device_qual(cdev); | |
1074 | value = min_t(int, w_length, | |
1075 | sizeof(struct usb_qualifier_descriptor)); | |
1076 | break; | |
1077 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1078 | if (!gadget_is_dualspeed(gadget) || |
1079 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1080 | break; |
1081 | /* FALLTHROUGH */ | |
1082 | case USB_DT_CONFIG: | |
1083 | value = config_desc(cdev, w_value); | |
1084 | if (value >= 0) | |
1085 | value = min(w_length, (u16) value); | |
1086 | break; | |
1087 | case USB_DT_STRING: | |
1088 | value = get_string(cdev, req->buf, | |
1089 | w_index, w_value & 0xff); | |
1090 | if (value >= 0) | |
1091 | value = min(w_length, (u16) value); | |
1092 | break; | |
bdb64d72 TB |
1093 | case USB_DT_BOS: |
1094 | if (gadget_is_superspeed(gadget)) { | |
1095 | value = bos_desc(cdev); | |
1096 | value = min(w_length, (u16) value); | |
1097 | } | |
1098 | break; | |
40982be5 DB |
1099 | } |
1100 | break; | |
1101 | ||
1102 | /* any number of configs can work */ | |
1103 | case USB_REQ_SET_CONFIGURATION: | |
1104 | if (ctrl->bRequestType != 0) | |
1105 | goto unknown; | |
1106 | if (gadget_is_otg(gadget)) { | |
1107 | if (gadget->a_hnp_support) | |
1108 | DBG(cdev, "HNP available\n"); | |
1109 | else if (gadget->a_alt_hnp_support) | |
1110 | DBG(cdev, "HNP on another port\n"); | |
1111 | else | |
1112 | VDBG(cdev, "HNP inactive\n"); | |
1113 | } | |
1114 | spin_lock(&cdev->lock); | |
1115 | value = set_config(cdev, ctrl, w_value); | |
1116 | spin_unlock(&cdev->lock); | |
1117 | break; | |
1118 | case USB_REQ_GET_CONFIGURATION: | |
1119 | if (ctrl->bRequestType != USB_DIR_IN) | |
1120 | goto unknown; | |
1121 | if (cdev->config) | |
1122 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1123 | else | |
1124 | *(u8 *)req->buf = 0; | |
1125 | value = min(w_length, (u16) 1); | |
1126 | break; | |
1127 | ||
1128 | /* function drivers must handle get/set altsetting; if there's | |
1129 | * no get() method, we know only altsetting zero works. | |
1130 | */ | |
1131 | case USB_REQ_SET_INTERFACE: | |
1132 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1133 | goto unknown; | |
ff085de7 | 1134 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1135 | break; |
08889517 | 1136 | f = cdev->config->interface[intf]; |
40982be5 DB |
1137 | if (!f) |
1138 | break; | |
dd4dff8b | 1139 | if (w_value && !f->set_alt) |
40982be5 DB |
1140 | break; |
1141 | value = f->set_alt(f, w_index, w_value); | |
1b9ba000 RQ |
1142 | if (value == USB_GADGET_DELAYED_STATUS) { |
1143 | DBG(cdev, | |
1144 | "%s: interface %d (%s) requested delayed status\n", | |
1145 | __func__, intf, f->name); | |
1146 | cdev->delayed_status++; | |
1147 | DBG(cdev, "delayed_status count %d\n", | |
1148 | cdev->delayed_status); | |
1149 | } | |
40982be5 DB |
1150 | break; |
1151 | case USB_REQ_GET_INTERFACE: | |
1152 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1153 | goto unknown; | |
ff085de7 | 1154 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1155 | break; |
08889517 | 1156 | f = cdev->config->interface[intf]; |
40982be5 DB |
1157 | if (!f) |
1158 | break; | |
1159 | /* lots of interfaces only need altsetting zero... */ | |
1160 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1161 | if (value < 0) | |
1162 | break; | |
1163 | *((u8 *)req->buf) = value; | |
1164 | value = min(w_length, (u16) 1); | |
1165 | break; | |
bdb64d72 TB |
1166 | |
1167 | /* | |
1168 | * USB 3.0 additions: | |
1169 | * Function driver should handle get_status request. If such cb | |
1170 | * wasn't supplied we respond with default value = 0 | |
1171 | * Note: function driver should supply such cb only for the first | |
1172 | * interface of the function | |
1173 | */ | |
1174 | case USB_REQ_GET_STATUS: | |
1175 | if (!gadget_is_superspeed(gadget)) | |
1176 | goto unknown; | |
1177 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1178 | goto unknown; | |
1179 | value = 2; /* This is the length of the get_status reply */ | |
1180 | put_unaligned_le16(0, req->buf); | |
1181 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1182 | break; | |
1183 | f = cdev->config->interface[intf]; | |
1184 | if (!f) | |
1185 | break; | |
1186 | status = f->get_status ? f->get_status(f) : 0; | |
1187 | if (status < 0) | |
1188 | break; | |
1189 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1190 | break; | |
1191 | /* | |
1192 | * Function drivers should handle SetFeature/ClearFeature | |
1193 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1194 | * only for the first interface of the function | |
1195 | */ | |
1196 | case USB_REQ_CLEAR_FEATURE: | |
1197 | case USB_REQ_SET_FEATURE: | |
1198 | if (!gadget_is_superspeed(gadget)) | |
1199 | goto unknown; | |
1200 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1201 | goto unknown; | |
1202 | switch (w_value) { | |
1203 | case USB_INTRF_FUNC_SUSPEND: | |
1204 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1205 | break; | |
1206 | f = cdev->config->interface[intf]; | |
1207 | if (!f) | |
1208 | break; | |
1209 | value = 0; | |
1210 | if (f->func_suspend) | |
1211 | value = f->func_suspend(f, w_index >> 8); | |
1212 | if (value < 0) { | |
1213 | ERROR(cdev, | |
1214 | "func_suspend() returned error %d\n", | |
1215 | value); | |
1216 | value = 0; | |
1217 | } | |
1218 | break; | |
1219 | } | |
1220 | break; | |
40982be5 DB |
1221 | default: |
1222 | unknown: | |
1223 | VDBG(cdev, | |
1224 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1225 | ctrl->bRequestType, ctrl->bRequest, | |
1226 | w_value, w_index, w_length); | |
1227 | ||
5242658d LP |
1228 | /* functions always handle their interfaces and endpoints... |
1229 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 DB |
1230 | * configuration code. |
1231 | * | |
1232 | * REVISIT it could make sense to let the composite device | |
1233 | * take such requests too, if that's ever needed: to work | |
1234 | * in config 0, etc. | |
1235 | */ | |
5242658d LP |
1236 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1237 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1238 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1239 | break; |
1240 | f = cdev->config->interface[intf]; | |
5242658d LP |
1241 | break; |
1242 | ||
1243 | case USB_RECIP_ENDPOINT: | |
1244 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); | |
1245 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1246 | if (test_bit(endp, f->endpoints)) | |
1247 | break; | |
1248 | } | |
1249 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1250 | f = NULL; |
5242658d | 1251 | break; |
40982be5 | 1252 | } |
5242658d LP |
1253 | |
1254 | if (f && f->setup) | |
1255 | value = f->setup(f, ctrl); | |
1256 | else { | |
40982be5 DB |
1257 | struct usb_configuration *c; |
1258 | ||
1259 | c = cdev->config; | |
1260 | if (c && c->setup) | |
1261 | value = c->setup(c, ctrl); | |
1262 | } | |
1263 | ||
1264 | goto done; | |
1265 | } | |
1266 | ||
1267 | /* respond with data transfer before status phase? */ | |
1b9ba000 | 1268 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 DB |
1269 | req->length = value; |
1270 | req->zero = value < w_length; | |
1271 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1272 | if (value < 0) { | |
1273 | DBG(cdev, "ep_queue --> %d\n", value); | |
1274 | req->status = 0; | |
1275 | composite_setup_complete(gadget->ep0, req); | |
1276 | } | |
1b9ba000 RQ |
1277 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1278 | WARN(cdev, | |
1279 | "%s: Delayed status not supported for w_length != 0", | |
1280 | __func__); | |
40982be5 DB |
1281 | } |
1282 | ||
1283 | done: | |
1284 | /* device either stalls (value < 0) or reports success */ | |
1285 | return value; | |
1286 | } | |
1287 | ||
1288 | static void composite_disconnect(struct usb_gadget *gadget) | |
1289 | { | |
1290 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1291 | unsigned long flags; | |
1292 | ||
1293 | /* REVISIT: should we have config and device level | |
1294 | * disconnect callbacks? | |
1295 | */ | |
1296 | spin_lock_irqsave(&cdev->lock, flags); | |
1297 | if (cdev->config) | |
1298 | reset_config(cdev); | |
3f3e12d0 MN |
1299 | if (composite->disconnect) |
1300 | composite->disconnect(cdev); | |
40982be5 DB |
1301 | spin_unlock_irqrestore(&cdev->lock, flags); |
1302 | } | |
1303 | ||
1304 | /*-------------------------------------------------------------------------*/ | |
1305 | ||
f48cf80f FC |
1306 | static ssize_t composite_show_suspended(struct device *dev, |
1307 | struct device_attribute *attr, | |
1308 | char *buf) | |
1309 | { | |
1310 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1311 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1312 | ||
1313 | return sprintf(buf, "%d\n", cdev->suspended); | |
1314 | } | |
1315 | ||
1316 | static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL); | |
1317 | ||
28824b18 | 1318 | static void |
40982be5 DB |
1319 | composite_unbind(struct usb_gadget *gadget) |
1320 | { | |
1321 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1322 | ||
1323 | /* composite_disconnect() must already have been called | |
1324 | * by the underlying peripheral controller driver! | |
1325 | * so there's no i/o concurrency that could affect the | |
1326 | * state protected by cdev->lock. | |
1327 | */ | |
1328 | WARN_ON(cdev->config); | |
1329 | ||
1330 | while (!list_empty(&cdev->configs)) { | |
1331 | struct usb_configuration *c; | |
1332 | ||
1333 | c = list_first_entry(&cdev->configs, | |
1334 | struct usb_configuration, list); | |
1335 | while (!list_empty(&c->functions)) { | |
1336 | struct usb_function *f; | |
1337 | ||
1338 | f = list_first_entry(&c->functions, | |
1339 | struct usb_function, list); | |
1340 | list_del(&f->list); | |
1341 | if (f->unbind) { | |
1342 | DBG(cdev, "unbind function '%s'/%p\n", | |
1343 | f->name, f); | |
1344 | f->unbind(c, f); | |
1345 | /* may free memory for "f" */ | |
1346 | } | |
1347 | } | |
1348 | list_del(&c->list); | |
1349 | if (c->unbind) { | |
1350 | DBG(cdev, "unbind config '%s'/%p\n", c->label, c); | |
1351 | c->unbind(c); | |
1352 | /* may free memory for "c" */ | |
1353 | } | |
1354 | } | |
1355 | if (composite->unbind) | |
1356 | composite->unbind(cdev); | |
1357 | ||
1358 | if (cdev->req) { | |
1359 | kfree(cdev->req->buf); | |
1360 | usb_ep_free_request(gadget->ep0, cdev->req); | |
1361 | } | |
daba5803 | 1362 | device_remove_file(&gadget->dev, &dev_attr_suspended); |
40982be5 DB |
1363 | kfree(cdev); |
1364 | set_gadget_data(gadget, NULL); | |
1365 | composite = NULL; | |
1366 | } | |
1367 | ||
ad1a8102 | 1368 | static u8 override_id(struct usb_composite_dev *cdev, u8 *desc) |
40982be5 | 1369 | { |
ad1a8102 MN |
1370 | if (!*desc) { |
1371 | int ret = usb_string_id(cdev); | |
1372 | if (unlikely(ret < 0)) | |
1373 | WARNING(cdev, "failed to override string ID\n"); | |
1374 | else | |
1375 | *desc = ret; | |
40982be5 | 1376 | } |
40982be5 | 1377 | |
ad1a8102 | 1378 | return *desc; |
40982be5 DB |
1379 | } |
1380 | ||
28824b18 | 1381 | static int composite_bind(struct usb_gadget *gadget) |
40982be5 DB |
1382 | { |
1383 | struct usb_composite_dev *cdev; | |
1384 | int status = -ENOMEM; | |
1385 | ||
1386 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
1387 | if (!cdev) | |
1388 | return status; | |
1389 | ||
1390 | spin_lock_init(&cdev->lock); | |
1391 | cdev->gadget = gadget; | |
1392 | set_gadget_data(gadget, cdev); | |
1393 | INIT_LIST_HEAD(&cdev->configs); | |
1394 | ||
1395 | /* preallocate control response and buffer */ | |
1396 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
1397 | if (!cdev->req) | |
1398 | goto fail; | |
1399 | cdev->req->buf = kmalloc(USB_BUFSIZ, GFP_KERNEL); | |
1400 | if (!cdev->req->buf) | |
1401 | goto fail; | |
1402 | cdev->req->complete = composite_setup_complete; | |
1403 | gadget->ep0->driver_data = cdev; | |
1404 | ||
1405 | cdev->bufsiz = USB_BUFSIZ; | |
1406 | cdev->driver = composite; | |
1407 | ||
37b5801e PM |
1408 | /* |
1409 | * As per USB compliance update, a device that is actively drawing | |
1410 | * more than 100mA from USB must report itself as bus-powered in | |
1411 | * the GetStatus(DEVICE) call. | |
1412 | */ | |
1413 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
1414 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
1415 | |
1416 | /* interface and string IDs start at zero via kzalloc. | |
1417 | * we force endpoints to start unassigned; few controller | |
1418 | * drivers will zero ep->driver_data. | |
1419 | */ | |
1420 | usb_ep_autoconfig_reset(cdev->gadget); | |
1421 | ||
1422 | /* composite gadget needs to assign strings for whole device (like | |
1423 | * serial number), register function drivers, potentially update | |
1424 | * power state and consumption, etc | |
1425 | */ | |
07a18bd7 | 1426 | status = composite_gadget_bind(cdev); |
40982be5 DB |
1427 | if (status < 0) |
1428 | goto fail; | |
1429 | ||
1430 | cdev->desc = *composite->dev; | |
40982be5 | 1431 | |
dbb442b8 GKH |
1432 | /* standardized runtime overrides for device ID data */ |
1433 | if (idVendor) | |
1434 | cdev->desc.idVendor = cpu_to_le16(idVendor); | |
1435 | if (idProduct) | |
1436 | cdev->desc.idProduct = cpu_to_le16(idProduct); | |
1437 | if (bcdDevice) | |
1438 | cdev->desc.bcdDevice = cpu_to_le16(bcdDevice); | |
1439 | ||
78bff3c6 | 1440 | /* string overrides */ |
ad1a8102 MN |
1441 | if (iManufacturer || !cdev->desc.iManufacturer) { |
1442 | if (!iManufacturer && !composite->iManufacturer && | |
1443 | !*composite_manufacturer) | |
1444 | snprintf(composite_manufacturer, | |
1445 | sizeof composite_manufacturer, | |
1446 | "%s %s with %s", | |
1447 | init_utsname()->sysname, | |
1448 | init_utsname()->release, | |
1449 | gadget->name); | |
1450 | ||
1451 | cdev->manufacturer_override = | |
1452 | override_id(cdev, &cdev->desc.iManufacturer); | |
1453 | } | |
1454 | ||
1455 | if (iProduct || (!cdev->desc.iProduct && composite->iProduct)) | |
1456 | cdev->product_override = | |
1457 | override_id(cdev, &cdev->desc.iProduct); | |
1458 | ||
1459 | if (iSerialNumber) | |
1460 | cdev->serial_override = | |
1461 | override_id(cdev, &cdev->desc.iSerialNumber); | |
1462 | ||
1463 | /* has userspace failed to provide a serial number? */ | |
1464 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
1465 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 | 1466 | |
ad1a8102 | 1467 | /* finish up */ |
f48cf80f FC |
1468 | status = device_create_file(&gadget->dev, &dev_attr_suspended); |
1469 | if (status) | |
1470 | goto fail; | |
1471 | ||
40982be5 DB |
1472 | INFO(cdev, "%s ready\n", composite->name); |
1473 | return 0; | |
1474 | ||
1475 | fail: | |
1476 | composite_unbind(gadget); | |
1477 | return status; | |
1478 | } | |
1479 | ||
1480 | /*-------------------------------------------------------------------------*/ | |
1481 | ||
1482 | static void | |
1483 | composite_suspend(struct usb_gadget *gadget) | |
1484 | { | |
1485 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1486 | struct usb_function *f; | |
1487 | ||
8942939a | 1488 | /* REVISIT: should we have config level |
40982be5 DB |
1489 | * suspend/resume callbacks? |
1490 | */ | |
1491 | DBG(cdev, "suspend\n"); | |
1492 | if (cdev->config) { | |
1493 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1494 | if (f->suspend) | |
1495 | f->suspend(f); | |
1496 | } | |
1497 | } | |
8942939a DB |
1498 | if (composite->suspend) |
1499 | composite->suspend(cdev); | |
f48cf80f FC |
1500 | |
1501 | cdev->suspended = 1; | |
b23f2f94 HW |
1502 | |
1503 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
1504 | } |
1505 | ||
1506 | static void | |
1507 | composite_resume(struct usb_gadget *gadget) | |
1508 | { | |
1509 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1510 | struct usb_function *f; | |
b23f2f94 | 1511 | u8 maxpower; |
40982be5 | 1512 | |
8942939a | 1513 | /* REVISIT: should we have config level |
40982be5 DB |
1514 | * suspend/resume callbacks? |
1515 | */ | |
1516 | DBG(cdev, "resume\n"); | |
8942939a DB |
1517 | if (composite->resume) |
1518 | composite->resume(cdev); | |
40982be5 DB |
1519 | if (cdev->config) { |
1520 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1521 | if (f->resume) | |
1522 | f->resume(f); | |
1523 | } | |
b23f2f94 HW |
1524 | |
1525 | maxpower = cdev->config->bMaxPower; | |
1526 | ||
1527 | usb_gadget_vbus_draw(gadget, maxpower ? | |
1528 | (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW); | |
40982be5 | 1529 | } |
f48cf80f FC |
1530 | |
1531 | cdev->suspended = 0; | |
40982be5 DB |
1532 | } |
1533 | ||
1534 | /*-------------------------------------------------------------------------*/ | |
1535 | ||
1536 | static struct usb_gadget_driver composite_driver = { | |
bdb64d72 TB |
1537 | #ifdef CONFIG_USB_GADGET_SUPERSPEED |
1538 | .speed = USB_SPEED_SUPER, | |
1539 | #else | |
40982be5 | 1540 | .speed = USB_SPEED_HIGH, |
bdb64d72 | 1541 | #endif |
40982be5 | 1542 | |
915c8bef | 1543 | .unbind = composite_unbind, |
40982be5 DB |
1544 | |
1545 | .setup = composite_setup, | |
1546 | .disconnect = composite_disconnect, | |
1547 | ||
1548 | .suspend = composite_suspend, | |
1549 | .resume = composite_resume, | |
1550 | ||
1551 | .driver = { | |
1552 | .owner = THIS_MODULE, | |
1553 | }, | |
1554 | }; | |
1555 | ||
1556 | /** | |
07a18bd7 | 1557 | * usb_composite_probe() - register a composite driver |
40982be5 | 1558 | * @driver: the driver to register |
07a18bd7 MN |
1559 | * @bind: the callback used to allocate resources that are shared across the |
1560 | * whole device, such as string IDs, and add its configurations using | |
1561 | * @usb_add_config(). This may fail by returning a negative errno | |
1562 | * value; it should return zero on successful initialization. | |
40982be5 DB |
1563 | * Context: single threaded during gadget setup |
1564 | * | |
1565 | * This function is used to register drivers using the composite driver | |
1566 | * framework. The return value is zero, or a negative errno value. | |
1567 | * Those values normally come from the driver's @bind method, which does | |
1568 | * all the work of setting up the driver to match the hardware. | |
1569 | * | |
1570 | * On successful return, the gadget is ready to respond to requests from | |
1571 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
1572 | * while it was binding. That would usually be done in order to wait for | |
1573 | * some userspace participation. | |
1574 | */ | |
05c3eebd | 1575 | int usb_composite_probe(struct usb_composite_driver *driver, |
07a18bd7 | 1576 | int (*bind)(struct usb_composite_dev *cdev)) |
40982be5 | 1577 | { |
07a18bd7 | 1578 | if (!driver || !driver->dev || !bind || composite) |
40982be5 DB |
1579 | return -EINVAL; |
1580 | ||
1581 | if (!driver->name) | |
1582 | driver->name = "composite"; | |
05c3eebd JB |
1583 | if (!driver->iProduct) |
1584 | driver->iProduct = driver->name; | |
40982be5 DB |
1585 | composite_driver.function = (char *) driver->name; |
1586 | composite_driver.driver.name = driver->name; | |
35a0e0bf TB |
1587 | composite_driver.speed = min((u8)composite_driver.speed, |
1588 | (u8)driver->max_speed); | |
40982be5 | 1589 | composite = driver; |
07a18bd7 | 1590 | composite_gadget_bind = bind; |
40982be5 | 1591 | |
b0fca50f | 1592 | return usb_gadget_probe_driver(&composite_driver, composite_bind); |
40982be5 DB |
1593 | } |
1594 | ||
1595 | /** | |
1596 | * usb_composite_unregister() - unregister a composite driver | |
1597 | * @driver: the driver to unregister | |
1598 | * | |
1599 | * This function is used to unregister drivers using the composite | |
1600 | * driver framework. | |
1601 | */ | |
28824b18 | 1602 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 DB |
1603 | { |
1604 | if (composite != driver) | |
1605 | return; | |
1606 | usb_gadget_unregister_driver(&composite_driver); | |
1607 | } | |
1b9ba000 RQ |
1608 | |
1609 | /** | |
1610 | * usb_composite_setup_continue() - Continue with the control transfer | |
1611 | * @cdev: the composite device who's control transfer was kept waiting | |
1612 | * | |
1613 | * This function must be called by the USB function driver to continue | |
1614 | * with the control transfer's data/status stage in case it had requested to | |
1615 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
1616 | * can request the composite framework to delay the setup request's data/status | |
1617 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
1618 | */ | |
1619 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
1620 | { | |
1621 | int value; | |
1622 | struct usb_request *req = cdev->req; | |
1623 | unsigned long flags; | |
1624 | ||
1625 | DBG(cdev, "%s\n", __func__); | |
1626 | spin_lock_irqsave(&cdev->lock, flags); | |
1627 | ||
1628 | if (cdev->delayed_status == 0) { | |
1629 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
1630 | ||
1631 | } else if (--cdev->delayed_status == 0) { | |
1632 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
1633 | req->length = 0; | |
1634 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
1635 | if (value < 0) { | |
1636 | DBG(cdev, "ep_queue --> %d\n", value); | |
1637 | req->status = 0; | |
1638 | composite_setup_complete(cdev->gadget->ep0, req); | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | spin_unlock_irqrestore(&cdev->lock, flags); | |
1643 | } | |
1644 |