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 | ||
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)) { | |
bdb64d72 TB |
178 | case USB_ENDPOINT_XFER_ISOC: |
179 | /* mult: bits 1:0 of bmAttributes */ | |
180 | _ep->mult = comp_desc->bmAttributes & 0x3; | |
9e878a6b PZ |
181 | case USB_ENDPOINT_XFER_BULK: |
182 | case USB_ENDPOINT_XFER_INT: | |
183 | _ep->maxburst = comp_desc->bMaxBurst; | |
bdb64d72 TB |
184 | break; |
185 | default: | |
186 | /* Do nothing for control endpoints */ | |
187 | break; | |
188 | } | |
189 | } | |
48767a4e TB |
190 | return 0; |
191 | } | |
40982be5 DB |
192 | |
193 | /** | |
194 | * usb_add_function() - add a function to a configuration | |
195 | * @config: the configuration | |
196 | * @function: the function being added | |
197 | * Context: single threaded during gadget setup | |
198 | * | |
199 | * After initialization, each configuration must have one or more | |
200 | * functions added to it. Adding a function involves calling its @bind() | |
201 | * method to allocate resources such as interface and string identifiers | |
202 | * and endpoints. | |
203 | * | |
204 | * This function returns the value of the function's bind(), which is | |
205 | * zero for success else a negative errno value. | |
206 | */ | |
28824b18 | 207 | int usb_add_function(struct usb_configuration *config, |
40982be5 DB |
208 | struct usb_function *function) |
209 | { | |
210 | int value = -EINVAL; | |
211 | ||
212 | DBG(config->cdev, "adding '%s'/%p to config '%s'/%p\n", | |
213 | function->name, function, | |
214 | config->label, config); | |
215 | ||
216 | if (!function->set_alt || !function->disable) | |
217 | goto done; | |
218 | ||
219 | function->config = config; | |
220 | list_add_tail(&function->list, &config->functions); | |
221 | ||
222 | /* REVISIT *require* function->bind? */ | |
223 | if (function->bind) { | |
224 | value = function->bind(config, function); | |
225 | if (value < 0) { | |
226 | list_del(&function->list); | |
227 | function->config = NULL; | |
228 | } | |
229 | } else | |
230 | value = 0; | |
231 | ||
232 | /* We allow configurations that don't work at both speeds. | |
233 | * If we run into a lowspeed Linux system, treat it the same | |
234 | * as full speed ... it's the function drivers that will need | |
235 | * to avoid bulk and ISO transfers. | |
236 | */ | |
237 | if (!config->fullspeed && function->descriptors) | |
238 | config->fullspeed = true; | |
239 | if (!config->highspeed && function->hs_descriptors) | |
240 | config->highspeed = true; | |
bdb64d72 TB |
241 | if (!config->superspeed && function->ss_descriptors) |
242 | config->superspeed = true; | |
40982be5 DB |
243 | |
244 | done: | |
245 | if (value) | |
246 | DBG(config->cdev, "adding '%s'/%p --> %d\n", | |
247 | function->name, function, value); | |
248 | return value; | |
249 | } | |
250 | ||
60beed95 DB |
251 | /** |
252 | * usb_function_deactivate - prevent function and gadget enumeration | |
253 | * @function: the function that isn't yet ready to respond | |
254 | * | |
255 | * Blocks response of the gadget driver to host enumeration by | |
256 | * preventing the data line pullup from being activated. This is | |
257 | * normally called during @bind() processing to change from the | |
258 | * initial "ready to respond" state, or when a required resource | |
259 | * becomes available. | |
260 | * | |
261 | * For example, drivers that serve as a passthrough to a userspace | |
262 | * daemon can block enumeration unless that daemon (such as an OBEX, | |
263 | * MTP, or print server) is ready to handle host requests. | |
264 | * | |
265 | * Not all systems support software control of their USB peripheral | |
266 | * data pullups. | |
267 | * | |
268 | * Returns zero on success, else negative errno. | |
269 | */ | |
270 | int usb_function_deactivate(struct usb_function *function) | |
271 | { | |
272 | struct usb_composite_dev *cdev = function->config->cdev; | |
b2bdf3a7 | 273 | unsigned long flags; |
60beed95 DB |
274 | int status = 0; |
275 | ||
b2bdf3a7 | 276 | spin_lock_irqsave(&cdev->lock, flags); |
60beed95 DB |
277 | |
278 | if (cdev->deactivations == 0) | |
279 | status = usb_gadget_disconnect(cdev->gadget); | |
280 | if (status == 0) | |
281 | cdev->deactivations++; | |
282 | ||
b2bdf3a7 | 283 | spin_unlock_irqrestore(&cdev->lock, flags); |
60beed95 DB |
284 | return status; |
285 | } | |
286 | ||
287 | /** | |
288 | * usb_function_activate - allow function and gadget enumeration | |
289 | * @function: function on which usb_function_activate() was called | |
290 | * | |
291 | * Reverses effect of usb_function_deactivate(). If no more functions | |
292 | * are delaying their activation, the gadget driver will respond to | |
293 | * host enumeration procedures. | |
294 | * | |
295 | * Returns zero on success, else negative errno. | |
296 | */ | |
297 | int usb_function_activate(struct usb_function *function) | |
298 | { | |
299 | struct usb_composite_dev *cdev = function->config->cdev; | |
300 | int status = 0; | |
301 | ||
302 | spin_lock(&cdev->lock); | |
303 | ||
304 | if (WARN_ON(cdev->deactivations == 0)) | |
305 | status = -EINVAL; | |
306 | else { | |
307 | cdev->deactivations--; | |
308 | if (cdev->deactivations == 0) | |
309 | status = usb_gadget_connect(cdev->gadget); | |
310 | } | |
311 | ||
312 | spin_unlock(&cdev->lock); | |
313 | return status; | |
314 | } | |
315 | ||
40982be5 DB |
316 | /** |
317 | * usb_interface_id() - allocate an unused interface ID | |
318 | * @config: configuration associated with the interface | |
319 | * @function: function handling the interface | |
320 | * Context: single threaded during gadget setup | |
321 | * | |
322 | * usb_interface_id() is called from usb_function.bind() callbacks to | |
323 | * allocate new interface IDs. The function driver will then store that | |
324 | * ID in interface, association, CDC union, and other descriptors. It | |
25985edc | 325 | * will also handle any control requests targeted at that interface, |
40982be5 DB |
326 | * particularly changing its altsetting via set_alt(). There may |
327 | * also be class-specific or vendor-specific requests to handle. | |
328 | * | |
329 | * All interface identifier should be allocated using this routine, to | |
330 | * ensure that for example different functions don't wrongly assign | |
331 | * different meanings to the same identifier. Note that since interface | |
25985edc | 332 | * identifiers are configuration-specific, functions used in more than |
40982be5 DB |
333 | * one configuration (or more than once in a given configuration) need |
334 | * multiple versions of the relevant descriptors. | |
335 | * | |
336 | * Returns the interface ID which was allocated; or -ENODEV if no | |
337 | * more interface IDs can be allocated. | |
338 | */ | |
28824b18 | 339 | int usb_interface_id(struct usb_configuration *config, |
40982be5 DB |
340 | struct usb_function *function) |
341 | { | |
342 | unsigned id = config->next_interface_id; | |
343 | ||
344 | if (id < MAX_CONFIG_INTERFACES) { | |
345 | config->interface[id] = function; | |
346 | config->next_interface_id = id + 1; | |
347 | return id; | |
348 | } | |
349 | return -ENODEV; | |
350 | } | |
351 | ||
352 | static int config_buf(struct usb_configuration *config, | |
353 | enum usb_device_speed speed, void *buf, u8 type) | |
354 | { | |
355 | struct usb_config_descriptor *c = buf; | |
356 | void *next = buf + USB_DT_CONFIG_SIZE; | |
357 | int len = USB_BUFSIZ - USB_DT_CONFIG_SIZE; | |
358 | struct usb_function *f; | |
359 | int status; | |
360 | ||
361 | /* write the config descriptor */ | |
362 | c = buf; | |
363 | c->bLength = USB_DT_CONFIG_SIZE; | |
364 | c->bDescriptorType = type; | |
365 | /* wTotalLength is written later */ | |
366 | c->bNumInterfaces = config->next_interface_id; | |
367 | c->bConfigurationValue = config->bConfigurationValue; | |
368 | c->iConfiguration = config->iConfiguration; | |
369 | c->bmAttributes = USB_CONFIG_ATT_ONE | config->bmAttributes; | |
36e893d2 | 370 | c->bMaxPower = config->bMaxPower ? : (CONFIG_USB_GADGET_VBUS_DRAW / 2); |
40982be5 DB |
371 | |
372 | /* There may be e.g. OTG descriptors */ | |
373 | if (config->descriptors) { | |
374 | status = usb_descriptor_fillbuf(next, len, | |
375 | config->descriptors); | |
376 | if (status < 0) | |
377 | return status; | |
378 | len -= status; | |
379 | next += status; | |
380 | } | |
381 | ||
382 | /* add each function's descriptors */ | |
383 | list_for_each_entry(f, &config->functions, list) { | |
384 | struct usb_descriptor_header **descriptors; | |
385 | ||
bdb64d72 TB |
386 | switch (speed) { |
387 | case USB_SPEED_SUPER: | |
388 | descriptors = f->ss_descriptors; | |
389 | break; | |
390 | case USB_SPEED_HIGH: | |
40982be5 | 391 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
392 | break; |
393 | default: | |
40982be5 | 394 | descriptors = f->descriptors; |
bdb64d72 TB |
395 | } |
396 | ||
40982be5 DB |
397 | if (!descriptors) |
398 | continue; | |
399 | status = usb_descriptor_fillbuf(next, len, | |
400 | (const struct usb_descriptor_header **) descriptors); | |
401 | if (status < 0) | |
402 | return status; | |
403 | len -= status; | |
404 | next += status; | |
405 | } | |
406 | ||
407 | len = next - buf; | |
408 | c->wTotalLength = cpu_to_le16(len); | |
409 | return len; | |
410 | } | |
411 | ||
412 | static int config_desc(struct usb_composite_dev *cdev, unsigned w_value) | |
413 | { | |
414 | struct usb_gadget *gadget = cdev->gadget; | |
415 | struct usb_configuration *c; | |
416 | u8 type = w_value >> 8; | |
417 | enum usb_device_speed speed = USB_SPEED_UNKNOWN; | |
418 | ||
bdb64d72 TB |
419 | if (gadget->speed == USB_SPEED_SUPER) |
420 | speed = gadget->speed; | |
421 | else if (gadget_is_dualspeed(gadget)) { | |
422 | int hs = 0; | |
40982be5 DB |
423 | if (gadget->speed == USB_SPEED_HIGH) |
424 | hs = 1; | |
425 | if (type == USB_DT_OTHER_SPEED_CONFIG) | |
426 | hs = !hs; | |
427 | if (hs) | |
428 | speed = USB_SPEED_HIGH; | |
429 | ||
430 | } | |
431 | ||
432 | /* This is a lookup by config *INDEX* */ | |
433 | w_value &= 0xff; | |
434 | list_for_each_entry(c, &cdev->configs, list) { | |
435 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
436 | switch (speed) { |
437 | case USB_SPEED_SUPER: | |
438 | if (!c->superspeed) | |
439 | continue; | |
440 | break; | |
441 | case USB_SPEED_HIGH: | |
40982be5 DB |
442 | if (!c->highspeed) |
443 | continue; | |
bdb64d72 TB |
444 | break; |
445 | default: | |
40982be5 DB |
446 | if (!c->fullspeed) |
447 | continue; | |
448 | } | |
bdb64d72 | 449 | |
40982be5 DB |
450 | if (w_value == 0) |
451 | return config_buf(c, speed, cdev->req->buf, type); | |
452 | w_value--; | |
453 | } | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | static int count_configs(struct usb_composite_dev *cdev, unsigned type) | |
458 | { | |
459 | struct usb_gadget *gadget = cdev->gadget; | |
460 | struct usb_configuration *c; | |
461 | unsigned count = 0; | |
462 | int hs = 0; | |
bdb64d72 | 463 | int ss = 0; |
40982be5 DB |
464 | |
465 | if (gadget_is_dualspeed(gadget)) { | |
466 | if (gadget->speed == USB_SPEED_HIGH) | |
467 | hs = 1; | |
bdb64d72 TB |
468 | if (gadget->speed == USB_SPEED_SUPER) |
469 | ss = 1; | |
40982be5 DB |
470 | if (type == USB_DT_DEVICE_QUALIFIER) |
471 | hs = !hs; | |
472 | } | |
473 | list_for_each_entry(c, &cdev->configs, list) { | |
474 | /* ignore configs that won't work at this speed */ | |
bdb64d72 TB |
475 | if (ss) { |
476 | if (!c->superspeed) | |
477 | continue; | |
478 | } else if (hs) { | |
40982be5 DB |
479 | if (!c->highspeed) |
480 | continue; | |
481 | } else { | |
482 | if (!c->fullspeed) | |
483 | continue; | |
484 | } | |
485 | count++; | |
486 | } | |
487 | return count; | |
488 | } | |
489 | ||
bdb64d72 TB |
490 | /** |
491 | * bos_desc() - prepares the BOS descriptor. | |
492 | * @cdev: pointer to usb_composite device to generate the bos | |
493 | * descriptor for | |
494 | * | |
495 | * This function generates the BOS (Binary Device Object) | |
496 | * descriptor and its device capabilities descriptors. The BOS | |
497 | * descriptor should be supported by a SuperSpeed device. | |
498 | */ | |
499 | static int bos_desc(struct usb_composite_dev *cdev) | |
500 | { | |
501 | struct usb_ext_cap_descriptor *usb_ext; | |
502 | struct usb_ss_cap_descriptor *ss_cap; | |
503 | struct usb_dcd_config_params dcd_config_params; | |
504 | struct usb_bos_descriptor *bos = cdev->req->buf; | |
505 | ||
506 | bos->bLength = USB_DT_BOS_SIZE; | |
507 | bos->bDescriptorType = USB_DT_BOS; | |
508 | ||
509 | bos->wTotalLength = cpu_to_le16(USB_DT_BOS_SIZE); | |
510 | bos->bNumDeviceCaps = 0; | |
511 | ||
512 | /* | |
513 | * A SuperSpeed device shall include the USB2.0 extension descriptor | |
514 | * and shall support LPM when operating in USB2.0 HS mode. | |
515 | */ | |
516 | usb_ext = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
517 | bos->bNumDeviceCaps++; | |
518 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_EXT_CAP_SIZE); | |
519 | usb_ext->bLength = USB_DT_USB_EXT_CAP_SIZE; | |
520 | usb_ext->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
521 | usb_ext->bDevCapabilityType = USB_CAP_TYPE_EXT; | |
522 | usb_ext->bmAttributes = cpu_to_le32(USB_LPM_SUPPORT); | |
523 | ||
524 | /* | |
525 | * The Superspeed USB Capability descriptor shall be implemented by all | |
526 | * SuperSpeed devices. | |
527 | */ | |
528 | ss_cap = cdev->req->buf + le16_to_cpu(bos->wTotalLength); | |
529 | bos->bNumDeviceCaps++; | |
530 | le16_add_cpu(&bos->wTotalLength, USB_DT_USB_SS_CAP_SIZE); | |
531 | ss_cap->bLength = USB_DT_USB_SS_CAP_SIZE; | |
532 | ss_cap->bDescriptorType = USB_DT_DEVICE_CAPABILITY; | |
533 | ss_cap->bDevCapabilityType = USB_SS_CAP_TYPE; | |
534 | ss_cap->bmAttributes = 0; /* LTM is not supported yet */ | |
535 | ss_cap->wSpeedSupported = cpu_to_le16(USB_LOW_SPEED_OPERATION | | |
536 | USB_FULL_SPEED_OPERATION | | |
537 | USB_HIGH_SPEED_OPERATION | | |
538 | USB_5GBPS_OPERATION); | |
539 | ss_cap->bFunctionalitySupport = USB_LOW_SPEED_OPERATION; | |
540 | ||
541 | /* Get Controller configuration */ | |
542 | if (cdev->gadget->ops->get_config_params) | |
543 | cdev->gadget->ops->get_config_params(&dcd_config_params); | |
544 | else { | |
089b837a | 545 | dcd_config_params.bU1devExitLat = USB_DEFAULT_U1_DEV_EXIT_LAT; |
bdb64d72 | 546 | dcd_config_params.bU2DevExitLat = |
089b837a | 547 | cpu_to_le16(USB_DEFAULT_U2_DEV_EXIT_LAT); |
bdb64d72 TB |
548 | } |
549 | ss_cap->bU1devExitLat = dcd_config_params.bU1devExitLat; | |
550 | ss_cap->bU2DevExitLat = dcd_config_params.bU2DevExitLat; | |
551 | ||
552 | return le16_to_cpu(bos->wTotalLength); | |
553 | } | |
554 | ||
40982be5 DB |
555 | static void device_qual(struct usb_composite_dev *cdev) |
556 | { | |
557 | struct usb_qualifier_descriptor *qual = cdev->req->buf; | |
558 | ||
559 | qual->bLength = sizeof(*qual); | |
560 | qual->bDescriptorType = USB_DT_DEVICE_QUALIFIER; | |
561 | /* POLICY: same bcdUSB and device type info at both speeds */ | |
562 | qual->bcdUSB = cdev->desc.bcdUSB; | |
563 | qual->bDeviceClass = cdev->desc.bDeviceClass; | |
564 | qual->bDeviceSubClass = cdev->desc.bDeviceSubClass; | |
565 | qual->bDeviceProtocol = cdev->desc.bDeviceProtocol; | |
566 | /* ASSUME same EP0 fifo size at both speeds */ | |
765f5b83 | 567 | qual->bMaxPacketSize0 = cdev->gadget->ep0->maxpacket; |
40982be5 | 568 | qual->bNumConfigurations = count_configs(cdev, USB_DT_DEVICE_QUALIFIER); |
c24f4227 | 569 | qual->bRESERVED = 0; |
40982be5 DB |
570 | } |
571 | ||
572 | /*-------------------------------------------------------------------------*/ | |
573 | ||
574 | static void reset_config(struct usb_composite_dev *cdev) | |
575 | { | |
576 | struct usb_function *f; | |
577 | ||
578 | DBG(cdev, "reset config\n"); | |
579 | ||
580 | list_for_each_entry(f, &cdev->config->functions, list) { | |
581 | if (f->disable) | |
582 | f->disable(f); | |
5242658d LP |
583 | |
584 | bitmap_zero(f->endpoints, 32); | |
40982be5 DB |
585 | } |
586 | cdev->config = NULL; | |
587 | } | |
588 | ||
589 | static int set_config(struct usb_composite_dev *cdev, | |
590 | const struct usb_ctrlrequest *ctrl, unsigned number) | |
591 | { | |
592 | struct usb_gadget *gadget = cdev->gadget; | |
593 | struct usb_configuration *c = NULL; | |
594 | int result = -EINVAL; | |
595 | unsigned power = gadget_is_otg(gadget) ? 8 : 100; | |
596 | int tmp; | |
597 | ||
40982be5 DB |
598 | if (number) { |
599 | list_for_each_entry(c, &cdev->configs, list) { | |
600 | if (c->bConfigurationValue == number) { | |
bdb64d72 TB |
601 | /* |
602 | * We disable the FDs of the previous | |
603 | * configuration only if the new configuration | |
604 | * is a valid one | |
605 | */ | |
606 | if (cdev->config) | |
607 | reset_config(cdev); | |
40982be5 DB |
608 | result = 0; |
609 | break; | |
610 | } | |
611 | } | |
612 | if (result < 0) | |
613 | goto done; | |
bdb64d72 TB |
614 | } else { /* Zero configuration value - need to reset the config */ |
615 | if (cdev->config) | |
616 | reset_config(cdev); | |
40982be5 | 617 | result = 0; |
bdb64d72 | 618 | } |
40982be5 | 619 | |
e538dfda MN |
620 | INFO(cdev, "%s config #%d: %s\n", |
621 | usb_speed_string(gadget->speed), | |
622 | number, c ? c->label : "unconfigured"); | |
40982be5 DB |
623 | |
624 | if (!c) | |
625 | goto done; | |
626 | ||
627 | cdev->config = c; | |
628 | ||
629 | /* Initialize all interfaces by setting them to altsetting zero. */ | |
630 | for (tmp = 0; tmp < MAX_CONFIG_INTERFACES; tmp++) { | |
631 | struct usb_function *f = c->interface[tmp]; | |
5242658d | 632 | struct usb_descriptor_header **descriptors; |
40982be5 DB |
633 | |
634 | if (!f) | |
635 | break; | |
636 | ||
5242658d LP |
637 | /* |
638 | * Record which endpoints are used by the function. This is used | |
639 | * to dispatch control requests targeted at that endpoint to the | |
640 | * function's setup callback instead of the current | |
641 | * configuration's setup callback. | |
642 | */ | |
bdb64d72 TB |
643 | switch (gadget->speed) { |
644 | case USB_SPEED_SUPER: | |
645 | descriptors = f->ss_descriptors; | |
646 | break; | |
647 | case USB_SPEED_HIGH: | |
5242658d | 648 | descriptors = f->hs_descriptors; |
bdb64d72 TB |
649 | break; |
650 | default: | |
5242658d | 651 | descriptors = f->descriptors; |
bdb64d72 | 652 | } |
5242658d LP |
653 | |
654 | for (; *descriptors; ++descriptors) { | |
655 | struct usb_endpoint_descriptor *ep; | |
656 | int addr; | |
657 | ||
658 | if ((*descriptors)->bDescriptorType != USB_DT_ENDPOINT) | |
659 | continue; | |
660 | ||
661 | ep = (struct usb_endpoint_descriptor *)*descriptors; | |
662 | addr = ((ep->bEndpointAddress & 0x80) >> 3) | |
663 | | (ep->bEndpointAddress & 0x0f); | |
664 | set_bit(addr, f->endpoints); | |
665 | } | |
666 | ||
40982be5 DB |
667 | result = f->set_alt(f, tmp, 0); |
668 | if (result < 0) { | |
669 | DBG(cdev, "interface %d (%s/%p) alt 0 --> %d\n", | |
670 | tmp, f->name, f, result); | |
671 | ||
672 | reset_config(cdev); | |
673 | goto done; | |
674 | } | |
1b9ba000 RQ |
675 | |
676 | if (result == USB_GADGET_DELAYED_STATUS) { | |
677 | DBG(cdev, | |
678 | "%s: interface %d (%s) requested delayed status\n", | |
679 | __func__, tmp, f->name); | |
680 | cdev->delayed_status++; | |
681 | DBG(cdev, "delayed_status count %d\n", | |
682 | cdev->delayed_status); | |
683 | } | |
40982be5 DB |
684 | } |
685 | ||
686 | /* when we return, be sure our power usage is valid */ | |
36e893d2 | 687 | power = c->bMaxPower ? (2 * c->bMaxPower) : CONFIG_USB_GADGET_VBUS_DRAW; |
40982be5 DB |
688 | done: |
689 | usb_gadget_vbus_draw(gadget, power); | |
1b9ba000 RQ |
690 | if (result >= 0 && cdev->delayed_status) |
691 | result = USB_GADGET_DELAYED_STATUS; | |
40982be5 DB |
692 | return result; |
693 | } | |
694 | ||
695 | /** | |
696 | * usb_add_config() - add a configuration to a device. | |
697 | * @cdev: wraps the USB gadget | |
698 | * @config: the configuration, with bConfigurationValue assigned | |
c9bfff9c | 699 | * @bind: the configuration's bind function |
40982be5 DB |
700 | * Context: single threaded during gadget setup |
701 | * | |
c9bfff9c | 702 | * One of the main tasks of a composite @bind() routine is to |
40982be5 DB |
703 | * add each of the configurations it supports, using this routine. |
704 | * | |
c9bfff9c | 705 | * This function returns the value of the configuration's @bind(), which |
40982be5 DB |
706 | * is zero for success else a negative errno value. Binding configurations |
707 | * assigns global resources including string IDs, and per-configuration | |
708 | * resources such as interface IDs and endpoints. | |
709 | */ | |
28824b18 | 710 | int usb_add_config(struct usb_composite_dev *cdev, |
c9bfff9c UKK |
711 | struct usb_configuration *config, |
712 | int (*bind)(struct usb_configuration *)) | |
40982be5 DB |
713 | { |
714 | int status = -EINVAL; | |
715 | struct usb_configuration *c; | |
716 | ||
717 | DBG(cdev, "adding config #%u '%s'/%p\n", | |
718 | config->bConfigurationValue, | |
719 | config->label, config); | |
720 | ||
c9bfff9c | 721 | if (!config->bConfigurationValue || !bind) |
40982be5 DB |
722 | goto done; |
723 | ||
724 | /* Prevent duplicate configuration identifiers */ | |
725 | list_for_each_entry(c, &cdev->configs, list) { | |
726 | if (c->bConfigurationValue == config->bConfigurationValue) { | |
727 | status = -EBUSY; | |
728 | goto done; | |
729 | } | |
730 | } | |
731 | ||
732 | config->cdev = cdev; | |
733 | list_add_tail(&config->list, &cdev->configs); | |
734 | ||
735 | INIT_LIST_HEAD(&config->functions); | |
736 | config->next_interface_id = 0; | |
737 | ||
c9bfff9c | 738 | status = bind(config); |
40982be5 | 739 | if (status < 0) { |
124ef389 YO |
740 | while (!list_empty(&config->functions)) { |
741 | struct usb_function *f; | |
742 | ||
743 | f = list_first_entry(&config->functions, | |
744 | struct usb_function, list); | |
745 | list_del(&f->list); | |
746 | if (f->unbind) { | |
747 | DBG(cdev, "unbind function '%s'/%p\n", | |
748 | f->name, f); | |
749 | f->unbind(config, f); | |
750 | /* may free memory for "f" */ | |
751 | } | |
752 | } | |
40982be5 DB |
753 | list_del(&config->list); |
754 | config->cdev = NULL; | |
755 | } else { | |
756 | unsigned i; | |
757 | ||
bdb64d72 | 758 | DBG(cdev, "cfg %d/%p speeds:%s%s%s\n", |
40982be5 | 759 | config->bConfigurationValue, config, |
bdb64d72 | 760 | config->superspeed ? " super" : "", |
40982be5 DB |
761 | config->highspeed ? " high" : "", |
762 | config->fullspeed | |
763 | ? (gadget_is_dualspeed(cdev->gadget) | |
764 | ? " full" | |
765 | : " full/low") | |
766 | : ""); | |
767 | ||
768 | for (i = 0; i < MAX_CONFIG_INTERFACES; i++) { | |
769 | struct usb_function *f = config->interface[i]; | |
770 | ||
771 | if (!f) | |
772 | continue; | |
773 | DBG(cdev, " interface %d = %s/%p\n", | |
774 | i, f->name, f); | |
775 | } | |
776 | } | |
777 | ||
c9bfff9c | 778 | /* set_alt(), or next bind(), sets up |
40982be5 DB |
779 | * ep->driver_data as needed. |
780 | */ | |
781 | usb_ep_autoconfig_reset(cdev->gadget); | |
782 | ||
783 | done: | |
784 | if (status) | |
785 | DBG(cdev, "added config '%s'/%u --> %d\n", config->label, | |
786 | config->bConfigurationValue, status); | |
787 | return status; | |
788 | } | |
789 | ||
51cce6fc BG |
790 | static void remove_config(struct usb_composite_dev *cdev, |
791 | struct usb_configuration *config) | |
792 | { | |
793 | while (!list_empty(&config->functions)) { | |
794 | struct usb_function *f; | |
795 | ||
796 | f = list_first_entry(&config->functions, | |
797 | struct usb_function, list); | |
798 | list_del(&f->list); | |
799 | if (f->unbind) { | |
800 | DBG(cdev, "unbind function '%s'/%p\n", f->name, f); | |
801 | f->unbind(config, f); | |
802 | /* may free memory for "f" */ | |
803 | } | |
804 | } | |
805 | list_del(&config->list); | |
806 | if (config->unbind) { | |
807 | DBG(cdev, "unbind config '%s'/%p\n", config->label, config); | |
808 | config->unbind(config); | |
809 | /* may free memory for "c" */ | |
810 | } | |
811 | } | |
812 | ||
813 | /** | |
814 | * usb_remove_config() - remove a configuration from a device. | |
815 | * @cdev: wraps the USB gadget | |
816 | * @config: the configuration | |
817 | * | |
818 | * Drivers must call usb_gadget_disconnect before calling this function | |
819 | * to disconnect the device from the host and make sure the host will not | |
820 | * try to enumerate the device while we are changing the config list. | |
821 | */ | |
822 | void usb_remove_config(struct usb_composite_dev *cdev, | |
823 | struct usb_configuration *config) | |
824 | { | |
825 | unsigned long flags; | |
826 | ||
827 | spin_lock_irqsave(&cdev->lock, flags); | |
828 | ||
829 | if (cdev->config == config) | |
830 | reset_config(cdev); | |
831 | ||
832 | spin_unlock_irqrestore(&cdev->lock, flags); | |
833 | ||
834 | remove_config(cdev, config); | |
835 | } | |
836 | ||
40982be5 DB |
837 | /*-------------------------------------------------------------------------*/ |
838 | ||
839 | /* We support strings in multiple languages ... string descriptor zero | |
840 | * says which languages are supported. The typical case will be that | |
841 | * only one language (probably English) is used, with I18N handled on | |
842 | * the host side. | |
843 | */ | |
844 | ||
845 | static void collect_langs(struct usb_gadget_strings **sp, __le16 *buf) | |
846 | { | |
847 | const struct usb_gadget_strings *s; | |
20c5e74c | 848 | __le16 language; |
40982be5 DB |
849 | __le16 *tmp; |
850 | ||
851 | while (*sp) { | |
852 | s = *sp; | |
853 | language = cpu_to_le16(s->language); | |
854 | for (tmp = buf; *tmp && tmp < &buf[126]; tmp++) { | |
855 | if (*tmp == language) | |
856 | goto repeat; | |
857 | } | |
858 | *tmp++ = language; | |
859 | repeat: | |
860 | sp++; | |
861 | } | |
862 | } | |
863 | ||
864 | static int lookup_string( | |
865 | struct usb_gadget_strings **sp, | |
866 | void *buf, | |
867 | u16 language, | |
868 | int id | |
869 | ) | |
870 | { | |
871 | struct usb_gadget_strings *s; | |
872 | int value; | |
873 | ||
874 | while (*sp) { | |
875 | s = *sp++; | |
876 | if (s->language != language) | |
877 | continue; | |
878 | value = usb_gadget_get_string(s, id, buf); | |
879 | if (value > 0) | |
880 | return value; | |
881 | } | |
882 | return -EINVAL; | |
883 | } | |
884 | ||
885 | static int get_string(struct usb_composite_dev *cdev, | |
886 | void *buf, u16 language, int id) | |
887 | { | |
888 | struct usb_configuration *c; | |
889 | struct usb_function *f; | |
890 | int len; | |
ad1a8102 | 891 | const char *str; |
40982be5 DB |
892 | |
893 | /* Yes, not only is USB's I18N support probably more than most | |
894 | * folk will ever care about ... also, it's all supported here. | |
895 | * (Except for UTF8 support for Unicode's "Astral Planes".) | |
896 | */ | |
897 | ||
898 | /* 0 == report all available language codes */ | |
899 | if (id == 0) { | |
900 | struct usb_string_descriptor *s = buf; | |
901 | struct usb_gadget_strings **sp; | |
902 | ||
903 | memset(s, 0, 256); | |
904 | s->bDescriptorType = USB_DT_STRING; | |
905 | ||
906 | sp = composite->strings; | |
907 | if (sp) | |
908 | collect_langs(sp, s->wData); | |
909 | ||
910 | list_for_each_entry(c, &cdev->configs, list) { | |
911 | sp = c->strings; | |
912 | if (sp) | |
913 | collect_langs(sp, s->wData); | |
914 | ||
915 | list_for_each_entry(f, &c->functions, list) { | |
916 | sp = f->strings; | |
917 | if (sp) | |
918 | collect_langs(sp, s->wData); | |
919 | } | |
920 | } | |
921 | ||
417b57b3 | 922 | for (len = 0; len <= 126 && s->wData[len]; len++) |
40982be5 DB |
923 | continue; |
924 | if (!len) | |
925 | return -EINVAL; | |
926 | ||
927 | s->bLength = 2 * (len + 1); | |
928 | return s->bLength; | |
929 | } | |
930 | ||
ad1a8102 MN |
931 | /* Otherwise, look up and return a specified string. First |
932 | * check if the string has not been overridden. | |
933 | */ | |
934 | if (cdev->manufacturer_override == id) | |
935 | str = iManufacturer ?: composite->iManufacturer ?: | |
936 | composite_manufacturer; | |
937 | else if (cdev->product_override == id) | |
938 | str = iProduct ?: composite->iProduct; | |
939 | else if (cdev->serial_override == id) | |
940 | str = iSerialNumber; | |
941 | else | |
942 | str = NULL; | |
943 | if (str) { | |
944 | struct usb_gadget_strings strings = { | |
945 | .language = language, | |
946 | .strings = &(struct usb_string) { 0xff, str } | |
947 | }; | |
948 | return usb_gadget_get_string(&strings, 0xff, buf); | |
949 | } | |
950 | ||
951 | /* String IDs are device-scoped, so we look up each string | |
952 | * table we're told about. These lookups are infrequent; | |
953 | * simpler-is-better here. | |
40982be5 DB |
954 | */ |
955 | if (composite->strings) { | |
956 | len = lookup_string(composite->strings, buf, language, id); | |
957 | if (len > 0) | |
958 | return len; | |
959 | } | |
960 | list_for_each_entry(c, &cdev->configs, list) { | |
961 | if (c->strings) { | |
962 | len = lookup_string(c->strings, buf, language, id); | |
963 | if (len > 0) | |
964 | return len; | |
965 | } | |
966 | list_for_each_entry(f, &c->functions, list) { | |
967 | if (!f->strings) | |
968 | continue; | |
969 | len = lookup_string(f->strings, buf, language, id); | |
970 | if (len > 0) | |
971 | return len; | |
972 | } | |
973 | } | |
974 | return -EINVAL; | |
975 | } | |
976 | ||
977 | /** | |
978 | * usb_string_id() - allocate an unused string ID | |
979 | * @cdev: the device whose string descriptor IDs are being allocated | |
980 | * Context: single threaded during gadget setup | |
981 | * | |
982 | * @usb_string_id() is called from bind() callbacks to allocate | |
983 | * string IDs. Drivers for functions, configurations, or gadgets will | |
984 | * then store that ID in the appropriate descriptors and string table. | |
985 | * | |
f2adc4f8 MN |
986 | * All string identifier should be allocated using this, |
987 | * @usb_string_ids_tab() or @usb_string_ids_n() routine, to ensure | |
988 | * that for example different functions don't wrongly assign different | |
989 | * meanings to the same identifier. | |
40982be5 | 990 | */ |
28824b18 | 991 | int usb_string_id(struct usb_composite_dev *cdev) |
40982be5 DB |
992 | { |
993 | if (cdev->next_string_id < 254) { | |
f2adc4f8 MN |
994 | /* string id 0 is reserved by USB spec for list of |
995 | * supported languages */ | |
996 | /* 255 reserved as well? -- mina86 */ | |
40982be5 DB |
997 | cdev->next_string_id++; |
998 | return cdev->next_string_id; | |
999 | } | |
1000 | return -ENODEV; | |
1001 | } | |
1002 | ||
f2adc4f8 MN |
1003 | /** |
1004 | * usb_string_ids() - allocate unused string IDs in batch | |
1005 | * @cdev: the device whose string descriptor IDs are being allocated | |
1006 | * @str: an array of usb_string objects to assign numbers to | |
1007 | * Context: single threaded during gadget setup | |
1008 | * | |
1009 | * @usb_string_ids() is called from bind() callbacks to allocate | |
1010 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1011 | * then copy IDs from the string table to the appropriate descriptors | |
1012 | * and string table for other languages. | |
1013 | * | |
1014 | * All string identifier should be allocated using this, | |
1015 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1016 | * example different functions don't wrongly assign different meanings | |
1017 | * to the same identifier. | |
1018 | */ | |
1019 | int usb_string_ids_tab(struct usb_composite_dev *cdev, struct usb_string *str) | |
1020 | { | |
1021 | int next = cdev->next_string_id; | |
1022 | ||
1023 | for (; str->s; ++str) { | |
1024 | if (unlikely(next >= 254)) | |
1025 | return -ENODEV; | |
1026 | str->id = ++next; | |
1027 | } | |
1028 | ||
1029 | cdev->next_string_id = next; | |
1030 | ||
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | /** | |
1035 | * usb_string_ids_n() - allocate unused string IDs in batch | |
d187abb9 | 1036 | * @c: the device whose string descriptor IDs are being allocated |
f2adc4f8 MN |
1037 | * @n: number of string IDs to allocate |
1038 | * Context: single threaded during gadget setup | |
1039 | * | |
1040 | * Returns the first requested ID. This ID and next @n-1 IDs are now | |
d187abb9 | 1041 | * valid IDs. At least provided that @n is non-zero because if it |
f2adc4f8 MN |
1042 | * is, returns last requested ID which is now very useful information. |
1043 | * | |
1044 | * @usb_string_ids_n() is called from bind() callbacks to allocate | |
1045 | * string IDs. Drivers for functions, configurations, or gadgets will | |
1046 | * then store that ID in the appropriate descriptors and string table. | |
1047 | * | |
1048 | * All string identifier should be allocated using this, | |
1049 | * @usb_string_id() or @usb_string_ids_n() routine, to ensure that for | |
1050 | * example different functions don't wrongly assign different meanings | |
1051 | * to the same identifier. | |
1052 | */ | |
1053 | int usb_string_ids_n(struct usb_composite_dev *c, unsigned n) | |
1054 | { | |
1055 | unsigned next = c->next_string_id; | |
1056 | if (unlikely(n > 254 || (unsigned)next + n > 254)) | |
1057 | return -ENODEV; | |
1058 | c->next_string_id += n; | |
1059 | return next + 1; | |
1060 | } | |
1061 | ||
1062 | ||
40982be5 DB |
1063 | /*-------------------------------------------------------------------------*/ |
1064 | ||
1065 | static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req) | |
1066 | { | |
1067 | if (req->status || req->actual != req->length) | |
1068 | DBG((struct usb_composite_dev *) ep->driver_data, | |
1069 | "setup complete --> %d, %d/%d\n", | |
1070 | req->status, req->actual, req->length); | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * The setup() callback implements all the ep0 functionality that's | |
1075 | * not handled lower down, in hardware or the hardware driver(like | |
1076 | * device and endpoint feature flags, and their status). It's all | |
1077 | * housekeeping for the gadget function we're implementing. Most of | |
1078 | * the work is in config and function specific setup. | |
1079 | */ | |
1080 | static int | |
1081 | composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) | |
1082 | { | |
1083 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1084 | struct usb_request *req = cdev->req; | |
1085 | int value = -EOPNOTSUPP; | |
bdb64d72 | 1086 | int status = 0; |
40982be5 | 1087 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
08889517 | 1088 | u8 intf = w_index & 0xFF; |
40982be5 DB |
1089 | u16 w_value = le16_to_cpu(ctrl->wValue); |
1090 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
1091 | struct usb_function *f = NULL; | |
5242658d | 1092 | u8 endp; |
40982be5 DB |
1093 | |
1094 | /* partial re-init of the response message; the function or the | |
1095 | * gadget might need to intercept e.g. a control-OUT completion | |
1096 | * when we delegate to it. | |
1097 | */ | |
1098 | req->zero = 0; | |
1099 | req->complete = composite_setup_complete; | |
2edb11cb | 1100 | req->length = 0; |
40982be5 DB |
1101 | gadget->ep0->driver_data = cdev; |
1102 | ||
1103 | switch (ctrl->bRequest) { | |
1104 | ||
1105 | /* we handle all standard USB descriptors */ | |
1106 | case USB_REQ_GET_DESCRIPTOR: | |
1107 | if (ctrl->bRequestType != USB_DIR_IN) | |
1108 | goto unknown; | |
1109 | switch (w_value >> 8) { | |
1110 | ||
1111 | case USB_DT_DEVICE: | |
1112 | cdev->desc.bNumConfigurations = | |
1113 | count_configs(cdev, USB_DT_DEVICE); | |
bdb64d72 TB |
1114 | cdev->desc.bMaxPacketSize0 = |
1115 | cdev->gadget->ep0->maxpacket; | |
1116 | if (gadget_is_superspeed(gadget)) { | |
a8f21156 | 1117 | if (gadget->speed >= USB_SPEED_SUPER) { |
bdb64d72 | 1118 | cdev->desc.bcdUSB = cpu_to_le16(0x0300); |
a8f21156 SAS |
1119 | cdev->desc.bMaxPacketSize0 = 9; |
1120 | } else { | |
bdb64d72 | 1121 | cdev->desc.bcdUSB = cpu_to_le16(0x0210); |
a8f21156 | 1122 | } |
bdb64d72 TB |
1123 | } |
1124 | ||
40982be5 DB |
1125 | value = min(w_length, (u16) sizeof cdev->desc); |
1126 | memcpy(req->buf, &cdev->desc, value); | |
1127 | break; | |
1128 | case USB_DT_DEVICE_QUALIFIER: | |
bdb64d72 TB |
1129 | if (!gadget_is_dualspeed(gadget) || |
1130 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1131 | break; |
1132 | device_qual(cdev); | |
1133 | value = min_t(int, w_length, | |
1134 | sizeof(struct usb_qualifier_descriptor)); | |
1135 | break; | |
1136 | case USB_DT_OTHER_SPEED_CONFIG: | |
bdb64d72 TB |
1137 | if (!gadget_is_dualspeed(gadget) || |
1138 | gadget->speed >= USB_SPEED_SUPER) | |
40982be5 DB |
1139 | break; |
1140 | /* FALLTHROUGH */ | |
1141 | case USB_DT_CONFIG: | |
1142 | value = config_desc(cdev, w_value); | |
1143 | if (value >= 0) | |
1144 | value = min(w_length, (u16) value); | |
1145 | break; | |
1146 | case USB_DT_STRING: | |
1147 | value = get_string(cdev, req->buf, | |
1148 | w_index, w_value & 0xff); | |
1149 | if (value >= 0) | |
1150 | value = min(w_length, (u16) value); | |
1151 | break; | |
bdb64d72 TB |
1152 | case USB_DT_BOS: |
1153 | if (gadget_is_superspeed(gadget)) { | |
1154 | value = bos_desc(cdev); | |
1155 | value = min(w_length, (u16) value); | |
1156 | } | |
1157 | break; | |
40982be5 DB |
1158 | } |
1159 | break; | |
1160 | ||
1161 | /* any number of configs can work */ | |
1162 | case USB_REQ_SET_CONFIGURATION: | |
1163 | if (ctrl->bRequestType != 0) | |
1164 | goto unknown; | |
1165 | if (gadget_is_otg(gadget)) { | |
1166 | if (gadget->a_hnp_support) | |
1167 | DBG(cdev, "HNP available\n"); | |
1168 | else if (gadget->a_alt_hnp_support) | |
1169 | DBG(cdev, "HNP on another port\n"); | |
1170 | else | |
1171 | VDBG(cdev, "HNP inactive\n"); | |
1172 | } | |
1173 | spin_lock(&cdev->lock); | |
1174 | value = set_config(cdev, ctrl, w_value); | |
1175 | spin_unlock(&cdev->lock); | |
1176 | break; | |
1177 | case USB_REQ_GET_CONFIGURATION: | |
1178 | if (ctrl->bRequestType != USB_DIR_IN) | |
1179 | goto unknown; | |
1180 | if (cdev->config) | |
1181 | *(u8 *)req->buf = cdev->config->bConfigurationValue; | |
1182 | else | |
1183 | *(u8 *)req->buf = 0; | |
1184 | value = min(w_length, (u16) 1); | |
1185 | break; | |
1186 | ||
1187 | /* function drivers must handle get/set altsetting; if there's | |
1188 | * no get() method, we know only altsetting zero works. | |
1189 | */ | |
1190 | case USB_REQ_SET_INTERFACE: | |
1191 | if (ctrl->bRequestType != USB_RECIP_INTERFACE) | |
1192 | goto unknown; | |
ff085de7 | 1193 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1194 | break; |
08889517 | 1195 | f = cdev->config->interface[intf]; |
40982be5 DB |
1196 | if (!f) |
1197 | break; | |
dd4dff8b | 1198 | if (w_value && !f->set_alt) |
40982be5 DB |
1199 | break; |
1200 | value = f->set_alt(f, w_index, w_value); | |
1b9ba000 RQ |
1201 | if (value == USB_GADGET_DELAYED_STATUS) { |
1202 | DBG(cdev, | |
1203 | "%s: interface %d (%s) requested delayed status\n", | |
1204 | __func__, intf, f->name); | |
1205 | cdev->delayed_status++; | |
1206 | DBG(cdev, "delayed_status count %d\n", | |
1207 | cdev->delayed_status); | |
1208 | } | |
40982be5 DB |
1209 | break; |
1210 | case USB_REQ_GET_INTERFACE: | |
1211 | if (ctrl->bRequestType != (USB_DIR_IN|USB_RECIP_INTERFACE)) | |
1212 | goto unknown; | |
ff085de7 | 1213 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
40982be5 | 1214 | break; |
08889517 | 1215 | f = cdev->config->interface[intf]; |
40982be5 DB |
1216 | if (!f) |
1217 | break; | |
1218 | /* lots of interfaces only need altsetting zero... */ | |
1219 | value = f->get_alt ? f->get_alt(f, w_index) : 0; | |
1220 | if (value < 0) | |
1221 | break; | |
1222 | *((u8 *)req->buf) = value; | |
1223 | value = min(w_length, (u16) 1); | |
1224 | break; | |
bdb64d72 TB |
1225 | |
1226 | /* | |
1227 | * USB 3.0 additions: | |
1228 | * Function driver should handle get_status request. If such cb | |
1229 | * wasn't supplied we respond with default value = 0 | |
1230 | * Note: function driver should supply such cb only for the first | |
1231 | * interface of the function | |
1232 | */ | |
1233 | case USB_REQ_GET_STATUS: | |
1234 | if (!gadget_is_superspeed(gadget)) | |
1235 | goto unknown; | |
1236 | if (ctrl->bRequestType != (USB_DIR_IN | USB_RECIP_INTERFACE)) | |
1237 | goto unknown; | |
1238 | value = 2; /* This is the length of the get_status reply */ | |
1239 | put_unaligned_le16(0, req->buf); | |
1240 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1241 | break; | |
1242 | f = cdev->config->interface[intf]; | |
1243 | if (!f) | |
1244 | break; | |
1245 | status = f->get_status ? f->get_status(f) : 0; | |
1246 | if (status < 0) | |
1247 | break; | |
1248 | put_unaligned_le16(status & 0x0000ffff, req->buf); | |
1249 | break; | |
1250 | /* | |
1251 | * Function drivers should handle SetFeature/ClearFeature | |
1252 | * (FUNCTION_SUSPEND) request. function_suspend cb should be supplied | |
1253 | * only for the first interface of the function | |
1254 | */ | |
1255 | case USB_REQ_CLEAR_FEATURE: | |
1256 | case USB_REQ_SET_FEATURE: | |
1257 | if (!gadget_is_superspeed(gadget)) | |
1258 | goto unknown; | |
1259 | if (ctrl->bRequestType != (USB_DIR_OUT | USB_RECIP_INTERFACE)) | |
1260 | goto unknown; | |
1261 | switch (w_value) { | |
1262 | case USB_INTRF_FUNC_SUSPEND: | |
1263 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) | |
1264 | break; | |
1265 | f = cdev->config->interface[intf]; | |
1266 | if (!f) | |
1267 | break; | |
1268 | value = 0; | |
1269 | if (f->func_suspend) | |
1270 | value = f->func_suspend(f, w_index >> 8); | |
1271 | if (value < 0) { | |
1272 | ERROR(cdev, | |
1273 | "func_suspend() returned error %d\n", | |
1274 | value); | |
1275 | value = 0; | |
1276 | } | |
1277 | break; | |
1278 | } | |
1279 | break; | |
40982be5 DB |
1280 | default: |
1281 | unknown: | |
1282 | VDBG(cdev, | |
1283 | "non-core control req%02x.%02x v%04x i%04x l%d\n", | |
1284 | ctrl->bRequestType, ctrl->bRequest, | |
1285 | w_value, w_index, w_length); | |
1286 | ||
5242658d LP |
1287 | /* functions always handle their interfaces and endpoints... |
1288 | * punt other recipients (other, WUSB, ...) to the current | |
40982be5 DB |
1289 | * configuration code. |
1290 | * | |
1291 | * REVISIT it could make sense to let the composite device | |
1292 | * take such requests too, if that's ever needed: to work | |
1293 | * in config 0, etc. | |
1294 | */ | |
5242658d LP |
1295 | switch (ctrl->bRequestType & USB_RECIP_MASK) { |
1296 | case USB_RECIP_INTERFACE: | |
ff085de7 | 1297 | if (!cdev->config || intf >= MAX_CONFIG_INTERFACES) |
3c47eb06 MM |
1298 | break; |
1299 | f = cdev->config->interface[intf]; | |
5242658d LP |
1300 | break; |
1301 | ||
1302 | case USB_RECIP_ENDPOINT: | |
1303 | endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); | |
1304 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1305 | if (test_bit(endp, f->endpoints)) | |
1306 | break; | |
1307 | } | |
1308 | if (&f->list == &cdev->config->functions) | |
40982be5 | 1309 | f = NULL; |
5242658d | 1310 | break; |
40982be5 | 1311 | } |
5242658d LP |
1312 | |
1313 | if (f && f->setup) | |
1314 | value = f->setup(f, ctrl); | |
1315 | else { | |
40982be5 DB |
1316 | struct usb_configuration *c; |
1317 | ||
1318 | c = cdev->config; | |
1319 | if (c && c->setup) | |
1320 | value = c->setup(c, ctrl); | |
1321 | } | |
1322 | ||
1323 | goto done; | |
1324 | } | |
1325 | ||
1326 | /* respond with data transfer before status phase? */ | |
1b9ba000 | 1327 | if (value >= 0 && value != USB_GADGET_DELAYED_STATUS) { |
40982be5 DB |
1328 | req->length = value; |
1329 | req->zero = value < w_length; | |
1330 | value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC); | |
1331 | if (value < 0) { | |
1332 | DBG(cdev, "ep_queue --> %d\n", value); | |
1333 | req->status = 0; | |
1334 | composite_setup_complete(gadget->ep0, req); | |
1335 | } | |
1b9ba000 RQ |
1336 | } else if (value == USB_GADGET_DELAYED_STATUS && w_length != 0) { |
1337 | WARN(cdev, | |
1338 | "%s: Delayed status not supported for w_length != 0", | |
1339 | __func__); | |
40982be5 DB |
1340 | } |
1341 | ||
1342 | done: | |
1343 | /* device either stalls (value < 0) or reports success */ | |
1344 | return value; | |
1345 | } | |
1346 | ||
1347 | static void composite_disconnect(struct usb_gadget *gadget) | |
1348 | { | |
1349 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1350 | unsigned long flags; | |
1351 | ||
1352 | /* REVISIT: should we have config and device level | |
1353 | * disconnect callbacks? | |
1354 | */ | |
1355 | spin_lock_irqsave(&cdev->lock, flags); | |
1356 | if (cdev->config) | |
1357 | reset_config(cdev); | |
3f3e12d0 MN |
1358 | if (composite->disconnect) |
1359 | composite->disconnect(cdev); | |
40982be5 DB |
1360 | spin_unlock_irqrestore(&cdev->lock, flags); |
1361 | } | |
1362 | ||
1363 | /*-------------------------------------------------------------------------*/ | |
1364 | ||
f48cf80f FC |
1365 | static ssize_t composite_show_suspended(struct device *dev, |
1366 | struct device_attribute *attr, | |
1367 | char *buf) | |
1368 | { | |
1369 | struct usb_gadget *gadget = dev_to_usb_gadget(dev); | |
1370 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1371 | ||
1372 | return sprintf(buf, "%d\n", cdev->suspended); | |
1373 | } | |
1374 | ||
1375 | static DEVICE_ATTR(suspended, 0444, composite_show_suspended, NULL); | |
1376 | ||
28824b18 | 1377 | static void |
40982be5 DB |
1378 | composite_unbind(struct usb_gadget *gadget) |
1379 | { | |
1380 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1381 | ||
1382 | /* composite_disconnect() must already have been called | |
1383 | * by the underlying peripheral controller driver! | |
1384 | * so there's no i/o concurrency that could affect the | |
1385 | * state protected by cdev->lock. | |
1386 | */ | |
1387 | WARN_ON(cdev->config); | |
1388 | ||
1389 | while (!list_empty(&cdev->configs)) { | |
1390 | struct usb_configuration *c; | |
40982be5 DB |
1391 | c = list_first_entry(&cdev->configs, |
1392 | struct usb_configuration, list); | |
51cce6fc | 1393 | remove_config(cdev, c); |
40982be5 DB |
1394 | } |
1395 | if (composite->unbind) | |
1396 | composite->unbind(cdev); | |
1397 | ||
1398 | if (cdev->req) { | |
1399 | kfree(cdev->req->buf); | |
1400 | usb_ep_free_request(gadget->ep0, cdev->req); | |
1401 | } | |
daba5803 | 1402 | device_remove_file(&gadget->dev, &dev_attr_suspended); |
40982be5 DB |
1403 | kfree(cdev); |
1404 | set_gadget_data(gadget, NULL); | |
1405 | composite = NULL; | |
1406 | } | |
1407 | ||
ad1a8102 | 1408 | static u8 override_id(struct usb_composite_dev *cdev, u8 *desc) |
40982be5 | 1409 | { |
ad1a8102 MN |
1410 | if (!*desc) { |
1411 | int ret = usb_string_id(cdev); | |
1412 | if (unlikely(ret < 0)) | |
1413 | WARNING(cdev, "failed to override string ID\n"); | |
1414 | else | |
1415 | *desc = ret; | |
40982be5 | 1416 | } |
40982be5 | 1417 | |
ad1a8102 | 1418 | return *desc; |
40982be5 DB |
1419 | } |
1420 | ||
28824b18 | 1421 | static int composite_bind(struct usb_gadget *gadget) |
40982be5 DB |
1422 | { |
1423 | struct usb_composite_dev *cdev; | |
1424 | int status = -ENOMEM; | |
1425 | ||
1426 | cdev = kzalloc(sizeof *cdev, GFP_KERNEL); | |
1427 | if (!cdev) | |
1428 | return status; | |
1429 | ||
1430 | spin_lock_init(&cdev->lock); | |
1431 | cdev->gadget = gadget; | |
1432 | set_gadget_data(gadget, cdev); | |
1433 | INIT_LIST_HEAD(&cdev->configs); | |
1434 | ||
1435 | /* preallocate control response and buffer */ | |
1436 | cdev->req = usb_ep_alloc_request(gadget->ep0, GFP_KERNEL); | |
1437 | if (!cdev->req) | |
1438 | goto fail; | |
1439 | cdev->req->buf = kmalloc(USB_BUFSIZ, GFP_KERNEL); | |
1440 | if (!cdev->req->buf) | |
1441 | goto fail; | |
1442 | cdev->req->complete = composite_setup_complete; | |
1443 | gadget->ep0->driver_data = cdev; | |
1444 | ||
1445 | cdev->bufsiz = USB_BUFSIZ; | |
1446 | cdev->driver = composite; | |
1447 | ||
37b5801e PM |
1448 | /* |
1449 | * As per USB compliance update, a device that is actively drawing | |
1450 | * more than 100mA from USB must report itself as bus-powered in | |
1451 | * the GetStatus(DEVICE) call. | |
1452 | */ | |
1453 | if (CONFIG_USB_GADGET_VBUS_DRAW <= USB_SELF_POWER_VBUS_MAX_DRAW) | |
1454 | usb_gadget_set_selfpowered(gadget); | |
40982be5 DB |
1455 | |
1456 | /* interface and string IDs start at zero via kzalloc. | |
1457 | * we force endpoints to start unassigned; few controller | |
1458 | * drivers will zero ep->driver_data. | |
1459 | */ | |
1460 | usb_ep_autoconfig_reset(cdev->gadget); | |
1461 | ||
1462 | /* composite gadget needs to assign strings for whole device (like | |
1463 | * serial number), register function drivers, potentially update | |
1464 | * power state and consumption, etc | |
1465 | */ | |
07a18bd7 | 1466 | status = composite_gadget_bind(cdev); |
40982be5 DB |
1467 | if (status < 0) |
1468 | goto fail; | |
1469 | ||
1470 | cdev->desc = *composite->dev; | |
40982be5 | 1471 | |
dbb442b8 GKH |
1472 | /* standardized runtime overrides for device ID data */ |
1473 | if (idVendor) | |
1474 | cdev->desc.idVendor = cpu_to_le16(idVendor); | |
1475 | if (idProduct) | |
1476 | cdev->desc.idProduct = cpu_to_le16(idProduct); | |
1477 | if (bcdDevice) | |
1478 | cdev->desc.bcdDevice = cpu_to_le16(bcdDevice); | |
1479 | ||
78bff3c6 | 1480 | /* string overrides */ |
ad1a8102 MN |
1481 | if (iManufacturer || !cdev->desc.iManufacturer) { |
1482 | if (!iManufacturer && !composite->iManufacturer && | |
1483 | !*composite_manufacturer) | |
1484 | snprintf(composite_manufacturer, | |
1485 | sizeof composite_manufacturer, | |
1486 | "%s %s with %s", | |
1487 | init_utsname()->sysname, | |
1488 | init_utsname()->release, | |
1489 | gadget->name); | |
1490 | ||
1491 | cdev->manufacturer_override = | |
1492 | override_id(cdev, &cdev->desc.iManufacturer); | |
1493 | } | |
1494 | ||
1495 | if (iProduct || (!cdev->desc.iProduct && composite->iProduct)) | |
1496 | cdev->product_override = | |
1497 | override_id(cdev, &cdev->desc.iProduct); | |
1498 | ||
1499 | if (iSerialNumber) | |
1500 | cdev->serial_override = | |
1501 | override_id(cdev, &cdev->desc.iSerialNumber); | |
1502 | ||
1503 | /* has userspace failed to provide a serial number? */ | |
1504 | if (composite->needs_serial && !cdev->desc.iSerialNumber) | |
1505 | WARNING(cdev, "userspace failed to provide iSerialNumber\n"); | |
40982be5 | 1506 | |
ad1a8102 | 1507 | /* finish up */ |
f48cf80f FC |
1508 | status = device_create_file(&gadget->dev, &dev_attr_suspended); |
1509 | if (status) | |
1510 | goto fail; | |
1511 | ||
40982be5 DB |
1512 | INFO(cdev, "%s ready\n", composite->name); |
1513 | return 0; | |
1514 | ||
1515 | fail: | |
1516 | composite_unbind(gadget); | |
1517 | return status; | |
1518 | } | |
1519 | ||
1520 | /*-------------------------------------------------------------------------*/ | |
1521 | ||
1522 | static void | |
1523 | composite_suspend(struct usb_gadget *gadget) | |
1524 | { | |
1525 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1526 | struct usb_function *f; | |
1527 | ||
8942939a | 1528 | /* REVISIT: should we have config level |
40982be5 DB |
1529 | * suspend/resume callbacks? |
1530 | */ | |
1531 | DBG(cdev, "suspend\n"); | |
1532 | if (cdev->config) { | |
1533 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1534 | if (f->suspend) | |
1535 | f->suspend(f); | |
1536 | } | |
1537 | } | |
8942939a DB |
1538 | if (composite->suspend) |
1539 | composite->suspend(cdev); | |
f48cf80f FC |
1540 | |
1541 | cdev->suspended = 1; | |
b23f2f94 HW |
1542 | |
1543 | usb_gadget_vbus_draw(gadget, 2); | |
40982be5 DB |
1544 | } |
1545 | ||
1546 | static void | |
1547 | composite_resume(struct usb_gadget *gadget) | |
1548 | { | |
1549 | struct usb_composite_dev *cdev = get_gadget_data(gadget); | |
1550 | struct usb_function *f; | |
b23f2f94 | 1551 | u8 maxpower; |
40982be5 | 1552 | |
8942939a | 1553 | /* REVISIT: should we have config level |
40982be5 DB |
1554 | * suspend/resume callbacks? |
1555 | */ | |
1556 | DBG(cdev, "resume\n"); | |
8942939a DB |
1557 | if (composite->resume) |
1558 | composite->resume(cdev); | |
40982be5 DB |
1559 | if (cdev->config) { |
1560 | list_for_each_entry(f, &cdev->config->functions, list) { | |
1561 | if (f->resume) | |
1562 | f->resume(f); | |
1563 | } | |
b23f2f94 HW |
1564 | |
1565 | maxpower = cdev->config->bMaxPower; | |
1566 | ||
1567 | usb_gadget_vbus_draw(gadget, maxpower ? | |
1568 | (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW); | |
40982be5 | 1569 | } |
f48cf80f FC |
1570 | |
1571 | cdev->suspended = 0; | |
40982be5 DB |
1572 | } |
1573 | ||
1574 | /*-------------------------------------------------------------------------*/ | |
1575 | ||
1576 | static struct usb_gadget_driver composite_driver = { | |
bdb64d72 | 1577 | #ifdef CONFIG_USB_GADGET_SUPERSPEED |
7177aed4 | 1578 | .max_speed = USB_SPEED_SUPER, |
bdb64d72 | 1579 | #else |
7177aed4 | 1580 | .max_speed = USB_SPEED_HIGH, |
bdb64d72 | 1581 | #endif |
40982be5 | 1582 | |
915c8bef | 1583 | .unbind = composite_unbind, |
40982be5 DB |
1584 | |
1585 | .setup = composite_setup, | |
1586 | .disconnect = composite_disconnect, | |
1587 | ||
1588 | .suspend = composite_suspend, | |
1589 | .resume = composite_resume, | |
1590 | ||
1591 | .driver = { | |
1592 | .owner = THIS_MODULE, | |
1593 | }, | |
1594 | }; | |
1595 | ||
1596 | /** | |
07a18bd7 | 1597 | * usb_composite_probe() - register a composite driver |
40982be5 | 1598 | * @driver: the driver to register |
07a18bd7 MN |
1599 | * @bind: the callback used to allocate resources that are shared across the |
1600 | * whole device, such as string IDs, and add its configurations using | |
1601 | * @usb_add_config(). This may fail by returning a negative errno | |
1602 | * value; it should return zero on successful initialization. | |
40982be5 DB |
1603 | * Context: single threaded during gadget setup |
1604 | * | |
1605 | * This function is used to register drivers using the composite driver | |
1606 | * framework. The return value is zero, or a negative errno value. | |
1607 | * Those values normally come from the driver's @bind method, which does | |
1608 | * all the work of setting up the driver to match the hardware. | |
1609 | * | |
1610 | * On successful return, the gadget is ready to respond to requests from | |
1611 | * the host, unless one of its components invokes usb_gadget_disconnect() | |
1612 | * while it was binding. That would usually be done in order to wait for | |
1613 | * some userspace participation. | |
1614 | */ | |
05c3eebd | 1615 | int usb_composite_probe(struct usb_composite_driver *driver, |
07a18bd7 | 1616 | int (*bind)(struct usb_composite_dev *cdev)) |
40982be5 | 1617 | { |
07a18bd7 | 1618 | if (!driver || !driver->dev || !bind || composite) |
40982be5 DB |
1619 | return -EINVAL; |
1620 | ||
1621 | if (!driver->name) | |
1622 | driver->name = "composite"; | |
05c3eebd JB |
1623 | if (!driver->iProduct) |
1624 | driver->iProduct = driver->name; | |
40982be5 DB |
1625 | composite_driver.function = (char *) driver->name; |
1626 | composite_driver.driver.name = driver->name; | |
7177aed4 MN |
1627 | composite_driver.max_speed = |
1628 | min_t(u8, composite_driver.max_speed, driver->max_speed); | |
40982be5 | 1629 | composite = driver; |
07a18bd7 | 1630 | composite_gadget_bind = bind; |
40982be5 | 1631 | |
b0fca50f | 1632 | return usb_gadget_probe_driver(&composite_driver, composite_bind); |
40982be5 DB |
1633 | } |
1634 | ||
1635 | /** | |
1636 | * usb_composite_unregister() - unregister a composite driver | |
1637 | * @driver: the driver to unregister | |
1638 | * | |
1639 | * This function is used to unregister drivers using the composite | |
1640 | * driver framework. | |
1641 | */ | |
28824b18 | 1642 | void usb_composite_unregister(struct usb_composite_driver *driver) |
40982be5 DB |
1643 | { |
1644 | if (composite != driver) | |
1645 | return; | |
1646 | usb_gadget_unregister_driver(&composite_driver); | |
1647 | } | |
1b9ba000 RQ |
1648 | |
1649 | /** | |
1650 | * usb_composite_setup_continue() - Continue with the control transfer | |
1651 | * @cdev: the composite device who's control transfer was kept waiting | |
1652 | * | |
1653 | * This function must be called by the USB function driver to continue | |
1654 | * with the control transfer's data/status stage in case it had requested to | |
1655 | * delay the data/status stages. A USB function's setup handler (e.g. set_alt()) | |
1656 | * can request the composite framework to delay the setup request's data/status | |
1657 | * stages by returning USB_GADGET_DELAYED_STATUS. | |
1658 | */ | |
1659 | void usb_composite_setup_continue(struct usb_composite_dev *cdev) | |
1660 | { | |
1661 | int value; | |
1662 | struct usb_request *req = cdev->req; | |
1663 | unsigned long flags; | |
1664 | ||
1665 | DBG(cdev, "%s\n", __func__); | |
1666 | spin_lock_irqsave(&cdev->lock, flags); | |
1667 | ||
1668 | if (cdev->delayed_status == 0) { | |
1669 | WARN(cdev, "%s: Unexpected call\n", __func__); | |
1670 | ||
1671 | } else if (--cdev->delayed_status == 0) { | |
1672 | DBG(cdev, "%s: Completing delayed status\n", __func__); | |
1673 | req->length = 0; | |
1674 | value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); | |
1675 | if (value < 0) { | |
1676 | DBG(cdev, "ep_queue --> %d\n", value); | |
1677 | req->status = 0; | |
1678 | composite_setup_complete(cdev->gadget->ep0, req); | |
1679 | } | |
1680 | } | |
1681 | ||
1682 | spin_unlock_irqrestore(&cdev->lock, flags); | |
1683 | } | |
1684 |