Commit | Line | Data |
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40982be5 DB |
1 | /* |
2 | * composite.c - infrastructure for Composite USB Gadgets | |
3 | * | |
4 | * Copyright (C) 2006-2008 David Brownell | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
40982be5 DB |
10 | */ |
11 | ||
12 | /* #define VERBOSE_DEBUG */ | |
13 | ||
14 | #include <linux/kallsyms.h> | |
15 | #include <linux/kernel.h> | |
16 | #include <linux/slab.h> | |
6eb0de82 | 17 | #include <linux/module.h> |
40982be5 | 18 | #include <linux/device.h> |
ad1a8102 | 19 | #include <linux/utsname.h> |
40982be5 DB |
20 | |
21 | #include <linux/usb/composite.h> | |
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 | ||
ad1a8102 MN |
31 | static char composite_manufacturer[50]; |
32 | ||
40982be5 | 33 | /*-------------------------------------------------------------------------*/ |
48767a4e TB |
34 | /** |
35 | * next_ep_desc() - advance to the next EP descriptor | |
36 | * @t: currect pointer within descriptor array | |
37 | * | |
38 | * Return: next EP descriptor or NULL | |
39 | * | |
40 | * Iterate over @t until either EP descriptor found or | |
41 | * NULL (that indicates end of list) encountered | |
42 | */ | |
43 | static struct usb_descriptor_header** | |
44 | next_ep_desc(struct usb_descriptor_header **t) | |
45 | { | |
46 | for (; *t; t++) { | |
47 | if ((*t)->bDescriptorType == USB_DT_ENDPOINT) | |
48 | return t; | |
49 | } | |
50 | return NULL; | |
51 | } | |
52 | ||
53 | /* | |
54 | * for_each_ep_desc()- iterate over endpoint descriptors in the | |
55 | * descriptors list | |
56 | * @start: pointer within descriptor array. | |
57 | * @ep_desc: endpoint descriptor to use as the loop cursor | |
58 | */ | |
59 | #define for_each_ep_desc(start, ep_desc) \ | |
60 | for (ep_desc = next_ep_desc(start); \ | |
61 | ep_desc; ep_desc = next_ep_desc(ep_desc+1)) | |
62 | ||
63 | /** | |
64 | * config_ep_by_speed() - configures the given endpoint | |
65 | * according to gadget speed. | |
66 | * @g: pointer to the gadget | |
67 | * @f: usb function | |
68 | * @_ep: the endpoint to configure | |
69 | * | |
70 | * Return: error code, 0 on success | |
71 | * | |
72 | * This function chooses the right descriptors for a given | |
73 | * endpoint according to gadget speed and saves it in the | |
74 | * endpoint desc field. If the endpoint already has a descriptor | |
75 | * assigned to it - overwrites it with currently corresponding | |
76 | * descriptor. The endpoint maxpacket field is updated according | |
77 | * to the chosen descriptor. | |
78 | * Note: the supplied function should hold all the descriptors | |
79 | * for supported speeds | |
80 | */ | |
81 | int config_ep_by_speed(struct usb_gadget *g, | |
82 | struct usb_function *f, | |
83 | struct usb_ep *_ep) | |
84 | { | |
b785ea7c | 85 | struct usb_composite_dev *cdev = get_gadget_data(g); |
48767a4e TB |
86 | struct usb_endpoint_descriptor *chosen_desc = NULL; |
87 | struct usb_descriptor_header **speed_desc = NULL; | |
88 | ||
bdb64d72 TB |
89 | struct usb_ss_ep_comp_descriptor *comp_desc = NULL; |
90 | int want_comp_desc = 0; | |
91 | ||
48767a4e TB |
92 | struct usb_descriptor_header **d_spd; /* cursor for speed desc */ |
93 | ||
94 | if (!g || !f || !_ep) | |
95 | return -EIO; | |
96 | ||
97 | /* select desired speed */ | |
98 | switch (g->speed) { | |
bdb64d72 TB |
99 | case USB_SPEED_SUPER: |
100 | if (gadget_is_superspeed(g)) { | |
101 | speed_desc = f->ss_descriptors; | |
102 | want_comp_desc = 1; | |
103 | break; | |
104 | } | |
105 | /* else: Fall trough */ | |
48767a4e TB |
106 | case USB_SPEED_HIGH: |
107 | if (gadget_is_dualspeed(g)) { | |
108 | speed_desc = f->hs_descriptors; | |
109 | break; | |
110 | } | |
111 | /* else: fall through */ | |
112 | default: | |
113 | speed_desc = f->descriptors; | |
114 | } | |
115 | /* find descriptors */ | |
116 | for_each_ep_desc(speed_desc, d_spd) { | |
117 | chosen_desc = (struct usb_endpoint_descriptor *)*d_spd; | |
118 | if (chosen_desc->bEndpointAddress == _ep->address) | |
119 | goto ep_found; | |
120 | } | |
121 | return -EIO; | |
122 | ||
123 | ep_found: | |
124 | /* commit results */ | |
29cc8897 | 125 | _ep->maxpacket = usb_endpoint_maxp(chosen_desc); |
48767a4e | 126 | _ep->desc = chosen_desc; |
bdb64d72 TB |
127 | _ep->comp_desc = NULL; |
128 | _ep->maxburst = 0; | |
129 | _ep->mult = 0; | |
130 | if (!want_comp_desc) | |
131 | return 0; | |
48767a4e | 132 | |
bdb64d72 TB |
133 | /* |
134 | * Companion descriptor should follow EP descriptor | |
135 | * USB 3.0 spec, #9.6.7 | |
136 | */ | |
137 | comp_desc = (struct usb_ss_ep_comp_descriptor *)*(++d_spd); | |
138 | if (!comp_desc || | |
139 | (comp_desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP)) | |
140 | return -EIO; | |
141 | _ep->comp_desc = comp_desc; | |
142 | if (g->speed == USB_SPEED_SUPER) { | |
143 | switch (usb_endpoint_type(_ep->desc)) { | |
bdb64d72 TB |
144 | case USB_ENDPOINT_XFER_ISOC: |
145 | /* mult: bits 1:0 of bmAttributes */ | |
146 | _ep->mult = comp_desc->bmAttributes & 0x3; | |
9e878a6b PZ |
147 | case USB_ENDPOINT_XFER_BULK: |
148 | case USB_ENDPOINT_XFER_INT: | |
b785ea7c | 149 | _ep->maxburst = comp_desc->bMaxBurst + 1; |
bdb64d72 TB |
150 | break; |
151 | default: | |
b785ea7c FB |
152 | if (comp_desc->bMaxBurst != 0) |
153 | ERROR(cdev, "ep0 bMaxBurst must be 0\n"); | |
154 | _ep->maxburst = 1; | |
bdb64d72 TB |
155 | break; |
156 | } | |
157 | } | |
48767a4e TB |
158 | return 0; |
159 | } | |
40982be5 DB |
160 | |
161 | /** | |
162 | * usb_add_function() - add a function to a configuration | |
163 | * @config: the configuration | |
164 | * @function: the function being added | |
165 | * Context: single threaded during gadget setup | |
166 | * | |
167 | * After initialization, each configuration must have one or more | |
168 | * functions added to it. Adding a function involves calling its @bind() | |
169 | * method to allocate resources such as interface and string identifiers | |
170 | * and endpoints. | |
171 | * | |
172 | * This function returns the value of the function's bind(), which is | |
173 | * zero for success else a negative errno value. | |
174 | */ | |
28824b18 | 175 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
176 | struct usb_function *function) |
177 | { | |
178 | int value = -EINVAL; | |
179 | ||
180 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
181 | function->name, function, | |
182 | config->label, config); | |
183 | ||
184 | if (!function->set_alt || !function->disable) | |
185 | goto done; | |
186 | ||
187 | function->config = config; | |
188 | list_add_tail(&function->list, &config->functions); | |
189 | ||
190 | /* REVISIT *require* function->bind? */ | |
191 | if (function->bind) { | |
192 | value = function->bind(config, function); | |
193 | if (value < 0) { | |
194 | list_del(&function->list); | |
195 | function->config = NULL; | |
196 | } | |
197 | } else | |
198 | value = 0; | |
199 | ||
200 | /* We allow configurations that don't work at both speeds. | |
201 | * If we run into a lowspeed Linux system, treat it the same | |
202 | * as full speed ... it's the function drivers that will need | |
203 | * to avoid bulk and ISO transfers. | |
204 | */ | |
205 | if (!config->fullspeed && function->descriptors) | |
206 | config->fullspeed = true; | |
207 | if (!config->highspeed && function->hs_descriptors) | |
208 | config->highspeed = true; | |
bdb64d72 TB |
209 | if (!config->superspeed && function->ss_descriptors) |
210 | config->superspeed = true; | |
40982be5 DB |
211 | |
212 | done: | |
213 | if (value) | |
214 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
215 | function->name, function, value); | |
216 | return value; | |
217 | } | |
218 | ||
60beed95 DB |
219 | /** |
220 | * usb_function_deactivate - prevent function and gadget enumeration | |
221 | * @function: the function that isn't yet ready to respond | |
222 | * | |
223 | * Blocks response of the gadget driver to host enumeration by | |
224 | * preventing the data line pullup from being activated. This is | |
225 | * normally called during @bind() processing to change from the | |
226 | * initial "ready to respond" state, or when a required resource | |
227 | * becomes available. | |
228 | * | |
229 | * For example, drivers that serve as a passthrough to a userspace | |
230 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
231 | * MTP, or print server) is ready to handle host requests. | |
232 | * | |
233 | * Not all systems support software control of their USB peripheral | |
234 | * data pullups. | |
235 | * | |
236 | * Returns zero on success, else negative errno. | |
237 | */ | |
238 | int usb_function_deactivate(struct usb_function *function) | |
239 | { | |
240 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 241 | unsigned long flags; |
60beed95 DB |
242 | int status = 0; |
243 | ||
b2bdf3a7 | 244 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
245 | |
246 | if (cdev->deactivations == 0) | |
247 | status = usb_gadget_disconnect(cdev->gadget); | |
248 | if (status == 0) | |
249 | cdev->deactivations++; | |
250 | ||
b2bdf3a7 | 251 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
252 | return status; |
253 | } | |
254 | ||
255 | /** | |
256 | * usb_function_activate - allow function and gadget enumeration | |
257 | * @function: function on which usb_function_activate() was called | |
258 | * | |
259 | * Reverses effect of usb_function_deactivate(). If no more functions | |
260 | * are delaying their activation, the gadget driver will respond to | |
261 | * host enumeration procedures. | |
262 | * | |
263 | * Returns zero on success, else negative errno. | |
264 | */ | |
265 | int usb_function_activate(struct usb_function *function) | |
266 | { | |
267 | struct usb_composite_dev *cdev = function->config->cdev; | |
4fefe9f6 | 268 | unsigned long flags; |
60beed95 DB |
269 | int status = 0; |
270 | ||
4fefe9f6 | 271 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
272 | |
273 | if (WARN_ON(cdev->deactivations == 0)) | |
274 | status = -EINVAL; | |
275 | else { | |
276 | cdev->deactivations--; | |
277 | if (cdev->deactivations == 0) | |
278 | status = usb_gadget_connect(cdev->gadget); | |
279 | } | |
280 | ||
4fefe9f6 | 281 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
282 | return status; |
283 | } | |
284 | ||
40982be5 DB |
285 | /** |
286 | * usb_interface_id() - allocate an unused interface ID | |
287 | * @config: configuration associated with the interface | |
288 | * @function: function handling the interface | |
289 | * Context: single threaded during gadget setup | |
290 | * | |
291 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
292 | * allocate new interface IDs. The function driver will then store that | |
293 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 294 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
295 | * particularly changing its altsetting via set_alt(). There may |
296 | * also be class-specific or vendor-specific requests to handle. | |
297 | * | |
298 | * All interface identifier should be allocated using this routine, to | |
299 | * ensure that for example different functions don't wrongly assign | |
300 | * different meanings to the same identifier. Note that since interface | |
25985edc | 301 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
302 | * one configuration (or more than once in a given configuration) need |
303 | * multiple versions of the relevant descriptors. | |
304 | * | |
305 | * Returns the interface ID which was allocated; or -ENODEV if no | |
306 | * more interface IDs can be allocated. | |
307 | */ | |
28824b18 | 308 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
309 | struct usb_function *function) |
310 | { | |
311 | unsigned id = config->next_interface_id; | |
312 | ||
313 | if (id < MAX_CONFIG_INTERFACES) { | |
314 | config->interface[id] = function; | |
315 | config->next_interface_id = id + 1; | |
316 | return id; | |
317 | } | |
318 | return -ENODEV; | |
319 | } | |
320 | ||
321 | static int config_buf(struct usb_configuration *config, | |
322 | enum usb_device_speed speed, void *buf, u8 type) | |
323 | { | |
324 | struct usb_config_descriptor *c = buf; | |
325 | void *next = buf + USB_DT_CONFIG_SIZE; | |
e13f17ff | 326 | int len; |
40982be5 DB |
327 | struct usb_function *f; |
328 | int status; | |
329 | ||
e13f17ff | 330 | len = USB_COMP_EP0_BUFSIZ - USB_DT_CONFIG_SIZE; |
40982be5 DB |
331 | /* write the config descriptor */ |
332 | c = buf; | |
333 | c->bLength = USB_DT_CONFIG_SIZE; | |
334 | c->bDescriptorType = type; | |
335 | /* wTotalLength is written later */ | |
336 | c->bNumInterfaces = config->next_interface_id; | |
337 | c->bConfigurationValue = config->bConfigurationValue; | |
338 | c->iConfiguration = config->iConfiguration; | |
339 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
36e893d2 | 340 | c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2); |
40982be5 DB |
341 | |
342 | /* There may be e.g. OTG descriptors */ | |
343 | if (config->descriptors) { | |
344 | status = usb_descriptor_fillbuf(next, len, | |
345 | config->descriptors); | |
346 | if (status < 0) | |
347 | return status; | |
348 | len -= status; | |
349 | next += status; | |
350 | } | |
351 | ||
352 | /* add each function's descriptors */ | |
353 | list_for_each_entry(f, &config->functions, list) { | |
354 | struct usb_descriptor_header **descriptors; | |
355 | ||
bdb64d72 TB |
356 | switch (speed) { |
357 | case USB_SPEED_SUPER: | |
358 | descriptors = f->ss_descriptors; | |
359 | break; | |
360 | case USB_SPEED_HIGH: | |
40982be5 | 361 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
362 | break; |
363 | default: | |
40982be5 | 364 | descriptors = f->descriptors; |
bdb64d72 TB |
365 | } |
366 | ||
40982be5 DB |
367 | if (!descriptors) |
368 | continue; | |
369 | status = usb_descriptor_fillbuf(next, len, | |
370 | (const struct usb_descriptor_header **) descriptors); | |
371 | if (status < 0) | |
372 | return status; | |
373 | len -= status; | |
374 | next += status; | |
375 | } | |
376 | ||
377 | len = next - buf; | |
378 | c->wTotalLength = cpu_to_le16(len); | |
379 | return len; | |
380 | } | |
381 | ||
382 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
383 | { | |
384 | struct usb_gadget *gadget = cdev->gadget; | |
385 | struct usb_configuration *c; | |
386 | u8 type = w_value >> 8; | |
387 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
388 | ||
bdb64d72 TB |
389 | if (gadget->speed == USB_SPEED_SUPER) |
390 | speed = gadget->speed; | |
391 | else if (gadget_is_dualspeed(gadget)) { | |
392 | int hs = 0; | |
40982be5 DB |
393 | if (gadget->speed == USB_SPEED_HIGH) |
394 | hs = 1; | |
395 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
396 | hs = !hs; | |
397 | if (hs) | |
398 | speed = USB_SPEED_HIGH; | |
399 | ||
400 | } | |
401 | ||
402 | /* This is a lookup by config *INDEX* */ | |
403 | w_value &= 0xff; | |
404 | list_for_each_entry(c, &cdev->configs, list) { | |
405 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
406 | switch (speed) { |
407 | case USB_SPEED_SUPER: | |
408 | if (!c->superspeed) | |
409 | continue; | |
410 | break; | |
411 | case USB_SPEED_HIGH: | |
40982be5 DB |
412 | if (!c->highspeed) |
413 | continue; | |
bdb64d72 TB |
414 | break; |
415 | default: | |
40982be5 DB |
416 | if (!c->fullspeed) |
417 | continue; | |
418 | } | |
bdb64d72 | 419 | |
40982be5 DB |
420 | if (w_value == 0) |
421 | return config_buf(c, speed, cdev->req->buf, type); | |
422 | w_value--; | |
423 | } | |
424 | return -EINVAL; | |
425 | } | |
426 | ||
427 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
428 | { | |
429 | struct usb_gadget *gadget = cdev->gadget; | |
430 | struct usb_configuration *c; | |
431 | unsigned count = 0; | |
432 | int hs = 0; | |
bdb64d72 | 433 | int ss = 0; |
40982be5 DB |
434 | |
435 | if (gadget_is_dualspeed(gadget)) { | |
436 | if (gadget->speed == USB_SPEED_HIGH) | |
437 | hs = 1; | |
bdb64d72 TB |
438 | if (gadget->speed == USB_SPEED_SUPER) |
439 | ss = 1; | |
40982be5 DB |
440 | if (type == USB_DT_DEVICE_QUALIFIER) |
441 | hs = !hs; | |
442 | } | |
443 | list_for_each_entry(c, &cdev->configs, list) { | |
444 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
445 | if (ss) { |
446 | if (!c->superspeed) | |
447 | continue; | |
448 | } else if (hs) { | |
40982be5 DB |
449 | if (!c->highspeed) |
450 | continue; | |
451 | } else { | |
452 | if (!c->fullspeed) | |
453 | continue; | |
454 | } | |
455 | count++; | |
456 | } | |
457 | return count; | |
458 | } | |
459 | ||
bdb64d72 TB |
460 | /** |
461 | * bos_desc() - prepares the BOS descriptor. | |
462 | * @cdev: pointer to usb_composite device to generate the bos | |
463 | * descriptor for | |
464 | * | |
465 | * This function generates the BOS (Binary Device Object) | |
466 | * descriptor and its device capabilities descriptors. The BOS | |
467 | * descriptor should be supported by a SuperSpeed device. | |
468 | */ | |
469 | static int bos_desc(struct usb_composite_dev *cdev) | |
470 | { | |
471 | struct usb_ext_cap_descriptor *usb_ext; | |
472 | struct usb_ss_cap_descriptor *ss_cap; | |
473 | struct usb_dcd_config_params dcd_config_params; | |
474 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
475 | ||
476 | bos->bLength = USB_DT_BOS_SIZE; | |
477 | bos->bDescriptorType = USB_DT_BOS; | |
478 | ||
479 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
480 | bos->bNumDeviceCaps = 0; | |
481 | ||
482 | /* | |
483 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
484 | * and shall support LPM when operating in USB2.0 HS mode. | |
485 | */ | |
486 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
487 | bos->bNumDeviceCaps++; | |
488 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
489 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
490 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
491 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
492 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT); | |
493 | ||
494 | /* | |
495 | * The Superspeed USB Capability descriptor shall be implemented by all | |
496 | * SuperSpeed devices. | |
497 | */ | |
498 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
499 | bos->bNumDeviceCaps++; | |
500 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
501 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
502 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
503 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
504 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
505 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
506 | USB_FULL_SPEED_OPERATION | | |
507 | USB_HIGH_SPEED_OPERATION | | |
508 | USB_5GBPS_OPERATION); | |
509 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
510 | ||
511 | /* Get Controller configuration */ | |
512 | if (cdev->gadget->ops->get_config_params) | |
513 | cdev->gadget->ops->get_config_params(&dcd_config_params); | |
514 | else { | |
089b837a | 515 | dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; |
bdb64d72 | 516 | dcd_config_params.bU2DevExitLat = |
089b837a | 517 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); |
bdb64d72 TB |
518 | } |
519 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
520 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
521 | ||
522 | return le16_to_cpu(bos->wTotalLength); | |
523 | } | |
524 | ||
40982be5 DB |
525 | static void device_qual(struct usb_composite_dev *cdev) |
526 | { | |
527 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
528 | ||
529 | qual->bLength = sizeof(*qual); | |
530 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
531 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
532 | qual->bcdUSB = cdev->desc.bcdUSB; | |
533 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
534 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
535 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
536 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 537 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 538 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 539 | qual->bRESERVED = 0; |
40982be5 DB |
540 | } |
541 | ||
542 | /*-------------------------------------------------------------------------*/ | |
543 | ||
544 | static void reset_config(struct usb_composite_dev *cdev) | |
545 | { | |
546 | struct usb_function *f; | |
547 | ||
548 | DBG(cdev, "reset config\n"); | |
549 | ||
550 | list_for_each_entry(f, &cdev->config->functions, list) { | |
551 | if (f->disable) | |
552 | f->disable(f); | |
5242658d LP |
553 | |
554 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
555 | } |
556 | cdev->config = NULL; | |
557 | } | |
558 | ||
559 | static int set_config(struct usb_composite_dev *cdev, | |
560 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
561 | { | |
562 | struct usb_gadget *gadget = cdev->gadget; | |
563 | struct usb_configuration *c = NULL; | |
564 | int result = -EINVAL; | |
565 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
566 | int tmp; | |
567 | ||
40982be5 DB |
568 | if (number) { |
569 | list_for_each_entry(c, &cdev->configs, list) { | |
570 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
571 | /* |
572 | * We disable the FDs of the previous | |
573 | * configuration only if the new configuration | |
574 | * is a valid one | |
575 | */ | |
576 | if (cdev->config) | |
577 | reset_config(cdev); | |
40982be5 DB |
578 | result = 0; |
579 | break; | |
580 | } | |
581 | } | |
582 | if (result < 0) | |
583 | goto done; | |
bdb64d72 TB |
584 | } else { /* Zero configuration value - need to reset the config */ |
585 | if (cdev->config) | |
586 | reset_config(cdev); | |
40982be5 | 587 | result = 0; |
bdb64d72 | 588 | } |
40982be5 | 589 | |
e538dfda MN |
590 | INFO(cdev, "%s config #%d: %s\n", |
591 | usb_speed_string(gadget->speed), | |
592 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
593 | |
594 | if (!c) | |
595 | goto done; | |
596 | ||
597 | cdev->config = c; | |
598 | ||
599 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
600 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
601 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 602 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
603 | |
604 | if (!f) | |
605 | break; | |
606 | ||
5242658d LP |
607 | /* |
608 | * Record which endpoints are used by the function. This is used | |
609 | * to dispatch control requests targeted at that endpoint to the | |
610 | * function's setup callback instead of the current | |
611 | * configuration's setup callback. | |
612 | */ | |
bdb64d72 TB |
613 | switch (gadget->speed) { |
614 | case USB_SPEED_SUPER: | |
615 | descriptors = f->ss_descriptors; | |
616 | break; | |
617 | case USB_SPEED_HIGH: | |
5242658d | 618 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
619 | break; |
620 | default: | |
5242658d | 621 | descriptors = f->descriptors; |
bdb64d72 | 622 | } |
5242658d LP |
623 | |
624 | for (; *descriptors; ++descriptors) { | |
625 | struct usb_endpoint_descriptor *ep; | |
626 | int addr; | |
627 | ||
628 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
629 | continue; | |
630 | ||
631 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
632 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
633 | | (ep->bEndpointAddress & 0x0f); | |
634 | set_bit(addr, f->endpoints); | |
635 | } | |
636 | ||
40982be5 DB |
637 | result = f->set_alt(f, tmp, 0); |
638 | if (result < 0) { | |
639 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
640 | tmp, f->name, f, result); | |
641 | ||
642 | reset_config(cdev); | |
643 | goto done; | |
644 | } | |
1b9ba000 RQ |
645 | |
646 | if (result == USB_GADGET_DELAYED_STATUS) { | |
647 | DBG(cdev, | |
648 | "%s: interface %d (%s) requested delayed status\n", | |
649 | __func__, tmp, f->name); | |
650 | cdev->delayed_status++; | |
651 | DBG(cdev, "delayed_status count %d\n", | |
652 | cdev->delayed_status); | |
653 | } | |
40982be5 DB |
654 | } |
655 | ||
656 | /* when we return, be sure our power usage is valid */ | |
36e893d2 | 657 | power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
658 | done: |
659 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
660 | if (result >= 0 && cdev->delayed_status) |
661 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
662 | return result; |
663 | } | |
664 | ||
665 | /** | |
666 | * usb_add_config() - add a configuration to a device. | |
667 | * @cdev: wraps the USB gadget | |
668 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 669 | * @bind: the configuration's bind function |
40982be5 DB |
670 | * Context: single threaded during gadget setup |
671 | * | |
c9bfff9c | 672 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
673 | * add each of the configurations it supports, using this routine. |
674 | * | |
c9bfff9c | 675 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
676 | * is zero for success else a negative errno value. Binding configurations |
677 | * assigns global resources including string IDs, and per-configuration | |
678 | * resources such as interface IDs and endpoints. | |
679 | */ | |
28824b18 | 680 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
681 | struct usb_configuration *config, |
682 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
683 | { |
684 | int status = -EINVAL; | |
685 | struct usb_configuration *c; | |
686 | ||
687 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
688 | config->bConfigurationValue, | |
689 | config->label, config); | |
690 | ||
c9bfff9c | 691 | if (!config->bConfigurationValue || !bind) |
40982be5 DB |
692 | goto done; |
693 | ||
694 | /* Prevent duplicate configuration identifiers */ | |
695 | list_for_each_entry(c, &cdev->configs, list) { | |
696 | if (c->bConfigurationValue == config->bConfigurationValue) { | |
697 | status = -EBUSY; | |
698 | goto done; | |
699 | } | |
700 | } | |
701 | ||
702 | config->cdev = cdev; | |
703 | list_add_tail(&config->list, &cdev->configs); | |
704 | ||
705 | INIT_LIST_HEAD(&config->functions); | |
706 | config->next_interface_id = 0; | |
02e8161e | 707 | memset(config->interface, 0, sizeof(config->interface)); |
40982be5 | 708 | |
c9bfff9c | 709 | status = bind(config); |
40982be5 | 710 | if (status < 0) { |
124ef389 YO |
711 | while (!list_empty(&config->functions)) { |
712 | struct usb_function *f; | |
713 | ||
714 | f = list_first_entry(&config->functions, | |
715 | struct usb_function, list); | |
716 | list_del(&f->list); | |
717 | if (f->unbind) { | |
718 | DBG(cdev, "unbind function '%s'/%p\n", | |
719 | f->name, f); | |
720 | f->unbind(config, f); | |
721 | /* may free memory for "f" */ | |
722 | } | |
723 | } | |
40982be5 DB |
724 | list_del(&config->list); |
725 | config->cdev = NULL; | |
726 | } else { | |
727 | unsigned i; | |
728 | ||
bdb64d72 | 729 | DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", |
40982be5 | 730 | config->bConfigurationValue, config, |
bdb64d72 | 731 | config->superspeed ? " super" : "", |
40982be5 DB |
732 | config->highspeed ? " high" : "", |
733 | config->fullspeed | |
734 | ? (gadget_is_dualspeed(cdev->gadget) | |
735 | ? " full" | |
736 | : " full/low") | |
737 | : ""); | |
738 | ||
739 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
740 | struct usb_function *f = config->interface[i]; | |
741 | ||
742 | if (!f) | |
743 | continue; | |
744 | DBG(cdev, " interface %d = %s/%p\n", | |
745 | i, f->name, f); | |
746 | } | |
747 | } | |
748 | ||
c9bfff9c | 749 | /* set_alt(), or next bind(), sets up |
40982be5 DB |
750 | * ep->driver_data as needed. |
751 | */ | |
752 | usb_ep_autoconfig_reset(cdev->gadget); | |
753 | ||
754 | done: | |
755 | if (status) | |
756 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
757 | config->bConfigurationValue, status); | |
758 | return status; | |
759 | } | |
760 | ||
51cce6fc BG |
761 | static void remove_config(struct usb_composite_dev *cdev, |
762 | struct usb_configuration *config) | |
763 | { | |
764 | while (!list_empty(&config->functions)) { | |
765 | struct usb_function *f; | |
766 | ||
767 | f = list_first_entry(&config->functions, | |
768 | struct usb_function, list); | |
769 | list_del(&f->list); | |
770 | if (f->unbind) { | |
771 | DBG(cdev, "unbind function '%s'/%p\n", f->name, f); | |
772 | f->unbind(config, f); | |
773 | /* may free memory for "f" */ | |
774 | } | |
775 | } | |
776 | list_del(&config->list); | |
777 | if (config->unbind) { | |
778 | DBG(cdev, "unbind config '%s'/%p\n", config->label, config); | |
779 | config->unbind(config); | |
780 | /* may free memory for "c" */ | |
781 | } | |
782 | } | |
783 | ||
784 | /** | |
785 | * usb_remove_config() - remove a configuration from a device. | |
786 | * @cdev: wraps the USB gadget | |
787 | * @config: the configuration | |
788 | * | |
789 | * Drivers must call usb_gadget_disconnect before calling this function | |
790 | * to disconnect the device from the host and make sure the host will not | |
791 | * try to enumerate the device while we are changing the config list. | |
792 | */ | |
793 | void usb_remove_config(struct usb_composite_dev *cdev, | |
794 | struct usb_configuration *config) | |
795 | { | |
796 | unsigned long flags; | |
797 | ||
798 | spin_lock_irqsave(&cdev->lock, flags); | |
799 | ||
800 | if (cdev->config == config) | |
801 | reset_config(cdev); | |
802 | ||
803 | spin_unlock_irqrestore(&cdev->lock, flags); | |
804 | ||
805 | remove_config(cdev, config); | |
806 | } | |
807 | ||
40982be5 DB |
808 | /*-------------------------------------------------------------------------*/ |
809 | ||
810 | /* We support strings in multiple languages ... string descriptor zero | |
811 | * says which languages are supported. The typical case will be that | |
812 | * only one language (probably English) is used, with I18N handled on | |
813 | * the host side. | |
814 | */ | |
815 | ||
816 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
817 | { | |
818 | const struct usb_gadget_strings *s; | |
20c5e74c | 819 | __le16 language; |
40982be5 DB |
820 | __le16 *tmp; |
821 | ||
822 | while (*sp) { | |
823 | s = *sp; | |
824 | language = cpu_to_le16(s->language); | |
825 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
826 | if (*tmp == language) | |
827 | goto repeat; | |
828 | } | |
829 | *tmp++ = language; | |
830 | repeat: | |
831 | sp++; | |
832 | } | |
833 | } | |
834 | ||
835 | static int lookup_string( | |
836 | struct usb_gadget_strings **sp, | |
837 | void *buf, | |
838 | u16 language, | |
839 | int id | |
840 | ) | |
841 | { | |
842 | struct usb_gadget_strings *s; | |
843 | int value; | |
844 | ||
845 | while (*sp) { | |
846 | s = *sp++; | |
847 | if (s->language != language) | |
848 | continue; | |
849 | value = usb_gadget_get_string(s, id, buf); | |
850 | if (value > 0) | |
851 | return value; | |
852 | } | |
853 | return -EINVAL; | |
854 | } | |
855 | ||
856 | static int get_string(struct usb_composite_dev *cdev, | |
857 | void *buf, u16 language, int id) | |
858 | { | |
ffe0b335 | 859 | struct usb_composite_driver *composite = cdev->driver; |
40982be5 DB |
860 | struct usb_configuration *c; |
861 | struct usb_function *f; | |
862 | int len; | |
ad1a8102 | 863 | const char *str; |
40982be5 DB |
864 | |
865 | /* Yes, not only is USB's I18N support probably more than most | |
866 | * folk will ever care about ... also, it's all supported here. | |
867 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
868 | */ | |
869 | ||
870 | /* 0 == report all available language codes */ | |
871 | if (id == 0) { | |
872 | struct usb_string_descriptor *s = buf; | |
873 | struct usb_gadget_strings **sp; | |
874 | ||
875 | memset(s, 0, 256); | |
876 | s->bDescriptorType = USB_DT_STRING; | |
877 | ||
878 | sp = composite->strings; | |
879 | if (sp) | |
880 | collect_langs(sp, s->wData); | |
881 | ||
882 | list_for_each_entry(c, &cdev->configs, list) { | |
883 | sp = c->strings; | |
884 | if (sp) | |
885 | collect_langs(sp, s->wData); | |
886 | ||
887 | list_for_each_entry(f, &c->functions, list) { | |
888 | sp = f->strings; | |
889 | if (sp) | |
890 | collect_langs(sp, s->wData); | |
891 | } | |
892 | } | |
893 | ||
417b57b3 | 894 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
895 | continue; |
896 | if (!len) | |
897 | return -EINVAL; | |
898 | ||
899 | s->bLength = 2 * (len + 1); | |
900 | return s->bLength; | |
901 | } | |
902 | ||
ad1a8102 MN |
903 | /* Otherwise, look up and return a specified string. First |
904 | * check if the string has not been overridden. | |
905 | */ | |
906 | if (cdev->manufacturer_override == id) | |
d33f74fc | 907 | str = composite_manufacturer; |
ad1a8102 MN |
908 | else |
909 | str = NULL; | |
910 | if (str) { | |
911 | struct usb_gadget_strings strings = { | |
912 | .language = language, | |
913 | .strings = &(struct usb_string) { 0xff, str } | |
914 | }; | |
915 | return usb_gadget_get_string(&strings, 0xff, buf); | |
916 | } | |
917 | ||
918 | /* String IDs are device-scoped, so we look up each string | |
919 | * table we're told about. These lookups are infrequent; | |
920 | * simpler-is-better here. | |
40982be5 DB |
921 | */ |
922 | if (composite->strings) { | |
923 | len = lookup_string(composite->strings, buf, language, id); | |
924 | if (len > 0) | |
925 | return len; | |
926 | } | |
927 | list_for_each_entry(c, &cdev->configs, list) { | |
928 | if (c->strings) { | |
929 | len = lookup_string(c->strings, buf, language, id); | |
930 | if (len > 0) | |
931 | return len; | |
932 | } | |
933 | list_for_each_entry(f, &c->functions, list) { | |
934 | if (!f->strings) | |
935 | continue; | |
936 | len = lookup_string(f->strings, buf, language, id); | |
937 | if (len > 0) | |
938 | return len; | |
939 | } | |
940 | } | |
941 | return -EINVAL; | |
942 | } | |
943 | ||
944 | /** | |
945 | * usb_string_id() - allocate an unused string ID | |
946 | * @cdev: the device whose string descriptor IDs are being allocated | |
947 | * Context: single threaded during gadget setup | |
948 | * | |
949 | * @usb_string_id() is called from bind() callbacks to allocate | |
950 | * string IDs. Drivers for functions, configurations, or gadgets will | |
951 | * then store that ID in the appropriate descriptors and string table. | |
952 | * | |
f2adc4f8 MN |
953 | * All string identifier should be allocated using this, |
954 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
955 | * that for example different functions don't wrongly assign different | |
956 | * meanings to the same identifier. | |
40982be5 | 957 | */ |
28824b18 | 958 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
959 | { |
960 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
961 | /* string id 0 is reserved by USB spec for list of |
962 | * supported languages */ | |
963 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
964 | cdev->next_string_id++; |
965 | return cdev->next_string_id; | |
966 | } | |
967 | return -ENODEV; | |
968 | } | |
969 | ||
f2adc4f8 MN |
970 | /** |
971 | * usb_string_ids() - allocate unused string IDs in batch | |
972 | * @cdev: the device whose string descriptor IDs are being allocated | |
973 | * @str: an array of usb_string objects to assign numbers to | |
974 | * Context: single threaded during gadget setup | |
975 | * | |
976 | * @usb_string_ids() is called from bind() callbacks to allocate | |
977 | * string IDs. Drivers for functions, configurations, or gadgets will | |
978 | * then copy IDs from the string table to the appropriate descriptors | |
979 | * and string table for other languages. | |
980 | * | |
981 | * All string identifier should be allocated using this, | |
982 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
983 | * example different functions don't wrongly assign different meanings | |
984 | * to the same identifier. | |
985 | */ | |
986 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
987 | { | |
988 | int next = cdev->next_string_id; | |
989 | ||
990 | for (; str->s; ++str) { | |
991 | if (unlikely(next >= 254)) | |
992 | return -ENODEV; | |
993 | str->id = ++next; | |
994 | } | |
995 | ||
996 | cdev->next_string_id = next; | |
997 | ||
998 | return 0; | |
999 | } | |
1000 | ||
1001 | /** | |
1002 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 1003 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
1004 | * @n: number of string IDs to allocate |
1005 | * Context: single threaded during gadget setup | |
1006 | * | |
1007 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 1008 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
1009 | * is, returns last requested ID which is now very useful information. |
1010 | * | |
1011 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
1012 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1013 | * then store that ID in the appropriate descriptors and string table. | |
1014 | * | |
1015 | * All string identifier should be allocated using this, | |
1016 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1017 | * example different functions don't wrongly assign different meanings | |
1018 | * to the same identifier. | |
1019 | */ | |
1020 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
1021 | { | |
1022 | unsigned next = c->next_string_id; | |
1023 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
1024 | return -ENODEV; | |
1025 | c->next_string_id += n; | |
1026 | return next + 1; | |
1027 | } | |
1028 | ||
1029 | ||
40982be5 DB |
1030 | /*-------------------------------------------------------------------------*/ |
1031 | ||
1032 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1033 | { | |
1034 | if (req->status || req->actual != req->length) | |
1035 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1036 | "setup complete --> %d, %d/%d\n", | |
1037 | req->status, req->actual, req->length); | |
1038 | } | |
1039 | ||
1040 | /* | |
1041 | * The setup() callback implements all the ep0 functionality that's | |
1042 | * not handled lower down, in hardware or the hardware driver(like | |
1043 | * device and endpoint feature flags, and their status). It's all | |
1044 | * housekeeping for the gadget function we're implementing. Most of | |
1045 | * the work is in config and function specific setup. | |
1046 | */ | |
1047 | static int | |
1048 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) | |
1049 | { | |
1050 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1051 | struct usb_request *req = cdev->req; | |
1052 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1053 | int status = 0; |
40982be5 | 1054 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1055 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1056 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1057 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1058 | struct usb_function *f = NULL; | |
5242658d | 1059 | u8 endp; |
40982be5 DB |
1060 | |
1061 | /* partial re-init of the response message; the function or the | |
1062 | * gadget might need to intercept e.g. a control-OUT completion | |
1063 | * when we delegate to it. | |
1064 | */ | |
1065 | req->zero = 0; | |
1066 | req->complete = composite_setup_complete; | |
2edb11cb | 1067 | req->length = 0; |
40982be5 DB |
1068 | gadget->ep0->driver_data = cdev; |
1069 | ||
1070 | switch (ctrl->bRequest) { | |
1071 | ||
1072 | /* we handle all standard USB descriptors */ | |
1073 | case USB_REQ_GET_DESCRIPTOR: | |
1074 | if (ctrl->bRequestType != USB_DIR_IN) | |
1075 | goto unknown; | |
1076 | switch (w_value >> 8) { | |
1077 | ||
1078 | case USB_DT_DEVICE: | |
1079 | cdev->desc.bNumConfigurations = | |
1080 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1081 | cdev->desc.bMaxPacketSize0 = |
1082 | cdev->gadget->ep0->maxpacket; | |
1083 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1084 | if (gadget->speed >= USB_SPEED_SUPER) { |
bdb64d72 | 1085 | cdev->desc.bcdUSB = cpu_to_le16(0x0300); |
a8f21156 SAS |
1086 | cdev->desc.bMaxPacketSize0 = 9; |
1087 | } else { | |
bdb64d72 | 1088 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1089 | } |
bdb64d72 TB |
1090 | } |
1091 | ||
40982be5 DB |
1092 | value = min(w_length, (u16) sizeof cdev->desc); |
1093 | memcpy(req->buf, &cdev->desc, value); | |
1094 | break; | |
1095 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1096 | if (!gadget_is_dualspeed(gadget) || |
1097 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1098 | break; |
1099 | device_qual(cdev); | |
1100 | value = min_t(int, w_length, | |
1101 | sizeof(struct usb_qualifier_descriptor)); | |
1102 | break; | |
1103 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1104 | if (!gadget_is_dualspeed(gadget) || |
1105 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1106 | break; |
1107 | /* FALLTHROUGH */ | |
1108 | case USB_DT_CONFIG: | |
1109 | value = config_desc(cdev, w_value); | |
1110 | if (value >= 0) | |
1111 | value = min(w_length, (u16) value); | |
1112 | break; | |
1113 | case USB_DT_STRING: | |
1114 | value = get_string(cdev, req->buf, | |
1115 | w_index, w_value & 0xff); | |
1116 | if (value >= 0) | |
1117 | value = min(w_length, (u16) value); | |
1118 | break; | |
bdb64d72 TB |
1119 | case USB_DT_BOS: |
1120 | if (gadget_is_superspeed(gadget)) { | |
1121 | value = bos_desc(cdev); | |
1122 | value = min(w_length, (u16) value); | |
1123 | } | |
1124 | break; | |
40982be5 DB |
1125 | } |
1126 | break; | |
1127 | ||
1128 | /* any number of configs can work */ | |
1129 | case USB_REQ_SET_CONFIGURATION: | |
1130 | if (ctrl->bRequestType != 0) | |
1131 | goto unknown; | |
1132 | if (gadget_is_otg(gadget)) { | |
1133 | if (gadget->a_hnp_support) | |
1134 | DBG(cdev, "HNP available\n"); | |
1135 | else if (gadget->a_alt_hnp_support) | |
1136 | DBG(cdev, "HNP on another port\n"); | |
1137 | else | |
1138 | VDBG(cdev, "HNP inactive\n"); | |
1139 | } | |
1140 | spin_lock(&cdev->lock); | |
1141 | value = set_config(cdev, ctrl, w_value); | |
1142 | spin_unlock(&cdev->lock); | |
1143 | break; | |
1144 | case USB_REQ_GET_CONFIGURATION: | |
1145 | if (ctrl->bRequestType != USB_DIR_IN) | |
1146 | goto unknown; | |
1147 | if (cdev->config) | |
1148 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1149 | else | |
1150 | *(u8 *)req->buf = 0; | |
1151 | value = min(w_length, (u16) 1); | |
1152 | break; | |
1153 | ||
1154 | /* function drivers must handle get/set altsetting; if there's | |
1155 | * no get() method, we know only altsetting zero works. | |
1156 | */ | |
1157 | case USB_REQ_SET_INTERFACE: | |
1158 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1159 | goto unknown; | |
ff085de7 | 1160 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1161 | break; |
08889517 | 1162 | f = cdev->config->interface[intf]; |
40982be5 DB |
1163 | if (!f) |
1164 | break; | |
dd4dff8b | 1165 | if (w_value && !f->set_alt) |
40982be5 DB |
1166 | break; |
1167 | value = f->set_alt(f, w_index, w_value); | |
1b9ba000 RQ |
1168 | if (value == USB_GADGET_DELAYED_STATUS) { |
1169 | DBG(cdev, | |
1170 | "%s: interface %d (%s) requested delayed status\n", | |
1171 | __func__, intf, f->name); | |
1172 | cdev->delayed_status++; | |
1173 | DBG(cdev, "delayed_status count %d\n", | |
1174 | cdev->delayed_status); | |
1175 | } | |
40982be5 DB |
1176 | break; |
1177 | case USB_REQ_GET_INTERFACE: | |
1178 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1179 | goto unknown; | |
ff085de7 | 1180 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1181 | break; |
08889517 | 1182 | f = cdev->config->interface[intf]; |
40982be5 DB |
1183 | if (!f) |
1184 | break; | |
1185 | /* lots of interfaces only need altsetting zero... */ | |
1186 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1187 | if (value < 0) | |
1188 | break; | |
1189 | *((u8 *)req->buf) = value; | |
1190 | value = min(w_length, (u16) 1); | |
1191 | break; | |
bdb64d72 TB |
1192 | |
1193 | /* | |
1194 | * USB 3.0 additions: | |
1195 | * Function driver should handle get_status request. If such cb | |
1196 | * wasn't supplied we respond with default value = 0 | |
1197 | * Note: function driver should supply such cb only for the first | |
1198 | * interface of the function | |
1199 | */ | |
1200 | case USB_REQ_GET_STATUS: | |
1201 | if (!gadget_is_superspeed(gadget)) | |
1202 | goto unknown; | |
1203 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1204 | goto unknown; | |
1205 | value = 2; /* This is the length of the get_status reply */ | |
1206 | put_unaligned_le16(0, req->buf); | |
1207 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1208 | break; | |
1209 | f = cdev->config->interface[intf]; | |
1210 | if (!f) | |
1211 | break; | |
1212 | status = f->get_status ? f->get_status(f) : 0; | |
1213 | if (status < 0) | |
1214 | break; | |
1215 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1216 | break; | |
1217 | /* | |
1218 | * Function drivers should handle SetFeature/ClearFeature | |
1219 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1220 | * only for the first interface of the function | |
1221 | */ | |
1222 | case USB_REQ_CLEAR_FEATURE: | |
1223 | case USB_REQ_SET_FEATURE: | |
1224 | if (!gadget_is_superspeed(gadget)) | |
1225 | goto unknown; | |
1226 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1227 | goto unknown; | |
1228 | switch (w_value) { | |
1229 | case USB_INTRF_FUNC_SUSPEND: | |
1230 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1231 | break; | |
1232 | f = cdev->config->interface[intf]; | |
1233 | if (!f) | |
1234 | break; | |
1235 | value = 0; | |
1236 | if (f->func_suspend) | |
1237 | value = f->func_suspend(f, w_index >> 8); | |
1238 | if (value < 0) { | |
1239 | ERROR(cdev, | |
1240 | "func_suspend() returned error %d\n", | |
1241 | value); | |
1242 | value = 0; | |
1243 | } | |
1244 | break; | |
1245 | } | |
1246 | break; | |
40982be5 DB |
1247 | default: |
1248 | unknown: | |
1249 | VDBG(cdev, | |
1250 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1251 | ctrl->bRequestType, ctrl->bRequest, | |
1252 | w_value, w_index, w_length); | |
1253 | ||
5242658d LP |
1254 | /* functions always handle their interfaces and endpoints... |
1255 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 DB |
1256 | * configuration code. |
1257 | * | |
1258 | * REVISIT it could make sense to let the composite device | |
1259 | * take such requests too, if that's ever needed: to work | |
1260 | * in config 0, etc. | |
1261 | */ | |
5242658d LP |
1262 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1263 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1264 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1265 | break; |
1266 | f = cdev->config->interface[intf]; | |
5242658d LP |
1267 | break; |
1268 | ||
1269 | case USB_RECIP_ENDPOINT: | |
1270 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); | |
1271 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1272 | if (test_bit(endp, f->endpoints)) | |
1273 | break; | |
1274 | } | |
1275 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1276 | f = NULL; |
5242658d | 1277 | break; |
40982be5 | 1278 | } |
5242658d LP |
1279 | |
1280 | if (f && f->setup) | |
1281 | value = f->setup(f, ctrl); | |
1282 | else { | |
40982be5 DB |
1283 | struct usb_configuration *c; |
1284 | ||
1285 | c = cdev->config; | |
1286 | if (c && c->setup) | |
1287 | value = c->setup(c, ctrl); | |
1288 | } | |
1289 | ||
1290 | goto done; | |
1291 | } | |
1292 | ||
1293 | /* respond with data transfer before status phase? */ | |
1b9ba000 | 1294 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 DB |
1295 | req->length = value; |
1296 | req->zero = value < w_length; | |
1297 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1298 | if (value < 0) { | |
1299 | DBG(cdev, "ep_queue --> %d\n", value); | |
1300 | req->status = 0; | |
1301 | composite_setup_complete(gadget->ep0, req); | |
1302 | } | |
1b9ba000 RQ |
1303 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1304 | WARN(cdev, | |
1305 | "%s: Delayed status not supported for w_length != 0", | |
1306 | __func__); | |
40982be5 DB |
1307 | } |
1308 | ||
1309 | done: | |
1310 | /* device either stalls (value < 0) or reports success */ | |
1311 | return value; | |
1312 | } | |
1313 | ||
1314 | static void composite_disconnect(struct usb_gadget *gadget) | |
1315 | { | |
1316 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1317 | unsigned long flags; | |
1318 | ||
1319 | /* REVISIT: should we have config and device level | |
1320 | * disconnect callbacks? | |
1321 | */ | |
1322 | spin_lock_irqsave(&cdev->lock, flags); | |
1323 | if (cdev->config) | |
1324 | reset_config(cdev); | |
ffe0b335 SAS |
1325 | if (cdev->driver->disconnect) |
1326 | cdev->driver->disconnect(cdev); | |
40982be5 DB |
1327 | spin_unlock_irqrestore(&cdev->lock, flags); |
1328 | } | |
1329 | ||
1330 | /*-------------------------------------------------------------------------*/ | |
1331 | ||
f48cf80f FC |
1332 | static ssize_t composite_show_suspended(struct device *dev, |
1333 | struct device_attribute *attr, | |
1334 | char *buf) | |
1335 | { | |
1336 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1337 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1338 | ||
1339 | return sprintf(buf, "%d\n", cdev->suspended); | |
1340 | } | |
1341 | ||
1342 | static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL); | |
1343 | ||
28824b18 | 1344 | static void |
40982be5 DB |
1345 | composite_unbind(struct usb_gadget *gadget) |
1346 | { | |
1347 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1348 | ||
1349 | /* composite_disconnect() must already have been called | |
1350 | * by the underlying peripheral controller driver! | |
1351 | * so there's no i/o concurrency that could affect the | |
1352 | * state protected by cdev->lock. | |
1353 | */ | |
1354 | WARN_ON(cdev->config); | |
1355 | ||
1356 | while (!list_empty(&cdev->configs)) { | |
1357 | struct usb_configuration *c; | |
40982be5 DB |
1358 | c = list_first_entry(&cdev->configs, |
1359 | struct usb_configuration, list); | |
51cce6fc | 1360 | remove_config(cdev, c); |
40982be5 | 1361 | } |
ffe0b335 SAS |
1362 | if (cdev->driver->unbind) |
1363 | cdev->driver->unbind(cdev); | |
40982be5 DB |
1364 | |
1365 | if (cdev->req) { | |
1366 | kfree(cdev->req->buf); | |
1367 | usb_ep_free_request(gadget->ep0, cdev->req); | |
1368 | } | |
daba5803 | 1369 | device_remove_file(&gadget->dev, &dev_attr_suspended); |
40982be5 DB |
1370 | kfree(cdev); |
1371 | set_gadget_data(gadget, NULL); | |
40982be5 DB |
1372 | } |
1373 | ||
ad1a8102 | 1374 | static u8 override_id(struct usb_composite_dev *cdev, u8 *desc) |
40982be5 | 1375 | { |
ad1a8102 MN |
1376 | if (!*desc) { |
1377 | int ret = usb_string_id(cdev); | |
1378 | if (unlikely(ret < 0)) | |
1379 | WARNING(cdev, "failed to override string ID\n"); | |
1380 | else | |
1381 | *desc = ret; | |
40982be5 | 1382 | } |
40982be5 | 1383 | |
ad1a8102 | 1384 | return *desc; |
40982be5 DB |
1385 | } |
1386 | ||
7d16e8d3 SAS |
1387 | static void update_unchanged_dev_desc(struct usb_device_descriptor *new, |
1388 | const struct usb_device_descriptor *old) | |
1389 | { | |
1390 | __le16 idVendor; | |
1391 | __le16 idProduct; | |
1392 | __le16 bcdDevice; | |
1cf0d264 | 1393 | u8 iSerialNumber; |
03de9bf6 | 1394 | u8 iManufacturer; |
2d35ee47 | 1395 | u8 iProduct; |
7d16e8d3 SAS |
1396 | |
1397 | /* | |
1398 | * these variables may have been set in | |
1399 | * usb_composite_overwrite_options() | |
1400 | */ | |
1401 | idVendor = new->idVendor; | |
1402 | idProduct = new->idProduct; | |
1403 | bcdDevice = new->bcdDevice; | |
1cf0d264 | 1404 | iSerialNumber = new->iSerialNumber; |
03de9bf6 | 1405 | iManufacturer = new->iManufacturer; |
2d35ee47 | 1406 | iProduct = new->iProduct; |
7d16e8d3 SAS |
1407 | |
1408 | *new = *old; | |
1409 | if (idVendor) | |
1410 | new->idVendor = idVendor; | |
1411 | if (idProduct) | |
1412 | new->idProduct = idProduct; | |
1413 | if (bcdDevice) | |
1414 | new->bcdDevice = bcdDevice; | |
1cf0d264 SAS |
1415 | if (iSerialNumber) |
1416 | new->iSerialNumber = iSerialNumber; | |
03de9bf6 SAS |
1417 | if (iManufacturer) |
1418 | new->iManufacturer = iManufacturer; | |
2d35ee47 SAS |
1419 | if (iProduct) |
1420 | new->iProduct = iProduct; | |
7d16e8d3 SAS |
1421 | } |
1422 | ||
ffe0b335 SAS |
1423 | static struct usb_composite_driver *to_cdriver(struct usb_gadget_driver *gdrv) |
1424 | { | |
1425 | return container_of(gdrv, struct usb_composite_driver, gadget_driver); | |
1426 | } | |
1427 | ||
1428 | static int composite_bind(struct usb_gadget *gadget, | |
1429 | struct usb_gadget_driver *gdriver) | |
40982be5 DB |
1430 | { |
1431 | struct usb_composite_dev *cdev; | |
ffe0b335 | 1432 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
40982be5 DB |
1433 | int status = -ENOMEM; |
1434 | ||
1435 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
1436 | if (!cdev) | |
1437 | return status; | |
1438 | ||
1439 | spin_lock_init(&cdev->lock); | |
1440 | cdev->gadget = gadget; | |
1441 | set_gadget_data(gadget, cdev); | |
1442 | INIT_LIST_HEAD(&cdev->configs); | |
1443 | ||
1444 | /* preallocate control response and buffer */ | |
1445 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
1446 | if (!cdev->req) | |
1447 | goto fail; | |
e13f17ff | 1448 | cdev->req->buf = kmalloc(USB_COMP_EP0_BUFSIZ, GFP_KERNEL); |
40982be5 DB |
1449 | if (!cdev->req->buf) |
1450 | goto fail; | |
1451 | cdev->req->complete = composite_setup_complete; | |
1452 | gadget->ep0->driver_data = cdev; | |
1453 | ||
40982be5 DB |
1454 | cdev->driver = composite; |
1455 | ||
37b5801e PM |
1456 | /* |
1457 | * As per USB compliance update, a device that is actively drawing | |
1458 | * more than 100mA from USB must report itself as bus-powered in | |
1459 | * the GetStatus(DEVICE) call. | |
1460 | */ | |
1461 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
1462 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
1463 | |
1464 | /* interface and string IDs start at zero via kzalloc. | |
1465 | * we force endpoints to start unassigned; few controller | |
1466 | * drivers will zero ep->driver_data. | |
1467 | */ | |
1468 | usb_ep_autoconfig_reset(cdev->gadget); | |
1469 | ||
1470 | /* composite gadget needs to assign strings for whole device (like | |
1471 | * serial number), register function drivers, potentially update | |
1472 | * power state and consumption, etc | |
1473 | */ | |
fac3a43e | 1474 | status = composite->bind(cdev); |
40982be5 DB |
1475 | if (status < 0) |
1476 | goto fail; | |
1477 | ||
7d16e8d3 | 1478 | update_unchanged_dev_desc(&cdev->desc, composite->dev); |
dbb442b8 | 1479 | |
78bff3c6 | 1480 | /* string overrides */ |
03de9bf6 | 1481 | if (!cdev->desc.iManufacturer) { |
d33f74fc SAS |
1482 | snprintf(composite_manufacturer, |
1483 | sizeof composite_manufacturer, | |
1484 | "%s %s with %s", | |
1485 | init_utsname()->sysname, | |
1486 | init_utsname()->release, | |
1487 | gadget->name); | |
ad1a8102 MN |
1488 | |
1489 | cdev->manufacturer_override = | |
1490 | override_id(cdev, &cdev->desc.iManufacturer); | |
1491 | } | |
1492 | ||
ad1a8102 MN |
1493 | /* has userspace failed to provide a serial number? */ |
1494 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
1495 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 | 1496 | |
ad1a8102 | 1497 | /* finish up */ |
f48cf80f FC |
1498 | status = device_create_file(&gadget->dev, &dev_attr_suspended); |
1499 | if (status) | |
1500 | goto fail; | |
1501 | ||
40982be5 DB |
1502 | INFO(cdev, "%s ready\n", composite->name); |
1503 | return 0; | |
1504 | ||
1505 | fail: | |
1506 | composite_unbind(gadget); | |
1507 | return status; | |
1508 | } | |
1509 | ||
1510 | /*-------------------------------------------------------------------------*/ | |
1511 | ||
1512 | static void | |
1513 | composite_suspend(struct usb_gadget *gadget) | |
1514 | { | |
1515 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1516 | struct usb_function *f; | |
1517 | ||
8942939a | 1518 | /* REVISIT: should we have config level |
40982be5 DB |
1519 | * suspend/resume callbacks? |
1520 | */ | |
1521 | DBG(cdev, "suspend\n"); | |
1522 | if (cdev->config) { | |
1523 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1524 | if (f->suspend) | |
1525 | f->suspend(f); | |
1526 | } | |
1527 | } | |
ffe0b335 SAS |
1528 | if (cdev->driver->suspend) |
1529 | cdev->driver->suspend(cdev); | |
f48cf80f FC |
1530 | |
1531 | cdev->suspended = 1; | |
b23f2f94 HW |
1532 | |
1533 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
1534 | } |
1535 | ||
1536 | static void | |
1537 | composite_resume(struct usb_gadget *gadget) | |
1538 | { | |
1539 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1540 | struct usb_function *f; | |
b23f2f94 | 1541 | u8 maxpower; |
40982be5 | 1542 | |
8942939a | 1543 | /* REVISIT: should we have config level |
40982be5 DB |
1544 | * suspend/resume callbacks? |
1545 | */ | |
1546 | DBG(cdev, "resume\n"); | |
ffe0b335 SAS |
1547 | if (cdev->driver->resume) |
1548 | cdev->driver->resume(cdev); | |
40982be5 DB |
1549 | if (cdev->config) { |
1550 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1551 | if (f->resume) | |
1552 | f->resume(f); | |
1553 | } | |
b23f2f94 HW |
1554 | |
1555 | maxpower = cdev->config->bMaxPower; | |
1556 | ||
1557 | usb_gadget_vbus_draw(gadget, maxpower ? | |
1558 | (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW); | |
40982be5 | 1559 | } |
f48cf80f FC |
1560 | |
1561 | cdev->suspended = 0; | |
40982be5 DB |
1562 | } |
1563 | ||
1564 | /*-------------------------------------------------------------------------*/ | |
1565 | ||
ffe0b335 | 1566 | static const struct usb_gadget_driver composite_driver_template = { |
93952956 | 1567 | .bind = composite_bind, |
915c8bef | 1568 | .unbind = composite_unbind, |
40982be5 DB |
1569 | |
1570 | .setup = composite_setup, | |
1571 | .disconnect = composite_disconnect, | |
1572 | ||
1573 | .suspend = composite_suspend, | |
1574 | .resume = composite_resume, | |
1575 | ||
1576 | .driver = { | |
1577 | .owner = THIS_MODULE, | |
1578 | }, | |
1579 | }; | |
1580 | ||
1581 | /** | |
07a18bd7 | 1582 | * usb_composite_probe() - register a composite driver |
40982be5 | 1583 | * @driver: the driver to register |
07a18bd7 MN |
1584 | * @bind: the callback used to allocate resources that are shared across the |
1585 | * whole device, such as string IDs, and add its configurations using | |
1586 | * @usb_add_config(). This may fail by returning a negative errno | |
1587 | * value; it should return zero on successful initialization. | |
40982be5 DB |
1588 | * Context: single threaded during gadget setup |
1589 | * | |
1590 | * This function is used to register drivers using the composite driver | |
1591 | * framework. The return value is zero, or a negative errno value. | |
1592 | * Those values normally come from the driver's @bind method, which does | |
1593 | * all the work of setting up the driver to match the hardware. | |
1594 | * | |
1595 | * On successful return, the gadget is ready to respond to requests from | |
1596 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
1597 | * while it was binding. That would usually be done in order to wait for | |
1598 | * some userspace participation. | |
1599 | */ | |
03e42bd5 | 1600 | int usb_composite_probe(struct usb_composite_driver *driver) |
40982be5 | 1601 | { |
ffe0b335 SAS |
1602 | struct usb_gadget_driver *gadget_driver; |
1603 | ||
1604 | if (!driver || !driver->dev || !driver->bind) | |
40982be5 DB |
1605 | return -EINVAL; |
1606 | ||
1607 | if (!driver->name) | |
1608 | driver->name = "composite"; | |
40982be5 | 1609 | |
ffe0b335 SAS |
1610 | driver->gadget_driver = composite_driver_template; |
1611 | gadget_driver = &driver->gadget_driver; | |
1612 | ||
1613 | gadget_driver->function = (char *) driver->name; | |
1614 | gadget_driver->driver.name = driver->name; | |
1615 | gadget_driver->max_speed = driver->max_speed; | |
1616 | ||
1617 | return usb_gadget_probe_driver(gadget_driver); | |
40982be5 DB |
1618 | } |
1619 | ||
1620 | /** | |
1621 | * usb_composite_unregister() - unregister a composite driver | |
1622 | * @driver: the driver to unregister | |
1623 | * | |
1624 | * This function is used to unregister drivers using the composite | |
1625 | * driver framework. | |
1626 | */ | |
28824b18 | 1627 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 | 1628 | { |
ffe0b335 | 1629 | usb_gadget_unregister_driver(&driver->gadget_driver); |
40982be5 | 1630 | } |
1b9ba000 RQ |
1631 | |
1632 | /** | |
1633 | * usb_composite_setup_continue() - Continue with the control transfer | |
1634 | * @cdev: the composite device who's control transfer was kept waiting | |
1635 | * | |
1636 | * This function must be called by the USB function driver to continue | |
1637 | * with the control transfer's data/status stage in case it had requested to | |
1638 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
1639 | * can request the composite framework to delay the setup request's data/status | |
1640 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
1641 | */ | |
1642 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
1643 | { | |
1644 | int value; | |
1645 | struct usb_request *req = cdev->req; | |
1646 | unsigned long flags; | |
1647 | ||
1648 | DBG(cdev, "%s\n", __func__); | |
1649 | spin_lock_irqsave(&cdev->lock, flags); | |
1650 | ||
1651 | if (cdev->delayed_status == 0) { | |
1652 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
1653 | ||
1654 | } else if (--cdev->delayed_status == 0) { | |
1655 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
1656 | req->length = 0; | |
1657 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
1658 | if (value < 0) { | |
1659 | DBG(cdev, "ep_queue --> %d\n", value); | |
1660 | req->status = 0; | |
1661 | composite_setup_complete(cdev->gadget->ep0, req); | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | spin_unlock_irqrestore(&cdev->lock, flags); | |
1666 | } | |
1667 | ||
7d16e8d3 SAS |
1668 | void usb_composite_overwrite_options(struct usb_composite_dev *cdev, |
1669 | struct usb_composite_overwrite *covr) | |
1670 | { | |
1671 | struct usb_device_descriptor *desc = &cdev->desc; | |
1cf0d264 SAS |
1672 | struct usb_gadget_strings *gstr = cdev->driver->strings[0]; |
1673 | struct usb_string *dev_str = gstr->strings; | |
7d16e8d3 SAS |
1674 | |
1675 | if (covr->idVendor) | |
1676 | desc->idVendor = cpu_to_le16(covr->idVendor); | |
1677 | ||
1678 | if (covr->idProduct) | |
1679 | desc->idProduct = cpu_to_le16(covr->idProduct); | |
1680 | ||
1681 | if (covr->bcdDevice) | |
1682 | desc->bcdDevice = cpu_to_le16(covr->bcdDevice); | |
1cf0d264 SAS |
1683 | |
1684 | if (covr->serial_number) { | |
1685 | desc->iSerialNumber = dev_str[USB_GADGET_SERIAL_IDX].id; | |
1686 | dev_str[USB_GADGET_SERIAL_IDX].s = covr->serial_number; | |
1687 | } | |
03de9bf6 SAS |
1688 | if (covr->manufacturer) { |
1689 | desc->iManufacturer = dev_str[USB_GADGET_MANUFACTURER_IDX].id; | |
1690 | dev_str[USB_GADGET_MANUFACTURER_IDX].s = covr->manufacturer; | |
1691 | } | |
2d35ee47 SAS |
1692 | |
1693 | if (covr->product) { | |
1694 | desc->iProduct = dev_str[USB_GADGET_PRODUCT_IDX].id; | |
1695 | dev_str[USB_GADGET_PRODUCT_IDX].s = covr->product; | |
1696 | } | |
7d16e8d3 | 1697 | } |