Commit | Line | Data |
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a400cadc DB |
1 | /* |
2 | * f_sourcesink.c - USB peripheral source/sink configuration driver | |
3 | * | |
4 | * Copyright (C) 2003-2008 David Brownell | |
5 | * Copyright (C) 2008 by Nokia Corporation | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
a400cadc DB |
11 | */ |
12 | ||
13 | /* #define VERBOSE_DEBUG */ | |
14 | ||
5a0e3ad6 | 15 | #include <linux/slab.h> |
a400cadc | 16 | #include <linux/kernel.h> |
a400cadc | 17 | #include <linux/device.h> |
6eb0de82 | 18 | #include <linux/module.h> |
a400cadc DB |
19 | |
20 | #include "g_zero.h" | |
21 | #include "gadget_chips.h" | |
22 | ||
23 | ||
24 | /* | |
25 | * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral | |
26 | * controller drivers. | |
27 | * | |
28 | * This just sinks bulk packets OUT to the peripheral and sources them IN | |
29 | * to the host, optionally with specific data patterns for integrity tests. | |
30 | * As such it supports basic functionality and load tests. | |
31 | * | |
32 | * In terms of control messaging, this supports all the standard requests | |
33 | * plus two that support control-OUT tests. If the optional "autoresume" | |
34 | * mode is enabled, it provides good functional coverage for the "USBCV" | |
35 | * test harness from USB-IF. | |
36 | * | |
37 | * Note that because this doesn't queue more than one request at a time, | |
38 | * some other function must be used to test queueing logic. The network | |
39 | * link (g_ether) is the best overall option for that, since its TX and RX | |
40 | * queues are relatively independent, will receive a range of packet sizes, | |
41 | * and can often be made to run out completely. Those issues are important | |
42 | * when stress testing peripheral controller drivers. | |
43 | * | |
44 | * | |
45 | * This is currently packaged as a configuration driver, which can't be | |
46 | * combined with other functions to make composite devices. However, it | |
47 | * can be combined with other independent configurations. | |
48 | */ | |
49 | struct f_sourcesink { | |
50 | struct usb_function function; | |
51 | ||
52 | struct usb_ep *in_ep; | |
53 | struct usb_ep *out_ep; | |
a400cadc DB |
54 | }; |
55 | ||
56 | static inline struct f_sourcesink *func_to_ss(struct usb_function *f) | |
57 | { | |
58 | return container_of(f, struct f_sourcesink, function); | |
59 | } | |
60 | ||
a400cadc DB |
61 | static unsigned pattern; |
62 | module_param(pattern, uint, 0); | |
63 | MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 "); | |
64 | ||
65 | /*-------------------------------------------------------------------------*/ | |
66 | ||
67 | static struct usb_interface_descriptor source_sink_intf = { | |
68 | .bLength = sizeof source_sink_intf, | |
69 | .bDescriptorType = USB_DT_INTERFACE, | |
70 | ||
71 | .bNumEndpoints = 2, | |
72 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, | |
73 | /* .iInterface = DYNAMIC */ | |
74 | }; | |
75 | ||
76 | /* full speed support: */ | |
77 | ||
78 | static struct usb_endpoint_descriptor fs_source_desc = { | |
79 | .bLength = USB_DT_ENDPOINT_SIZE, | |
80 | .bDescriptorType = USB_DT_ENDPOINT, | |
81 | ||
82 | .bEndpointAddress = USB_DIR_IN, | |
83 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
84 | }; | |
85 | ||
86 | static struct usb_endpoint_descriptor fs_sink_desc = { | |
87 | .bLength = USB_DT_ENDPOINT_SIZE, | |
88 | .bDescriptorType = USB_DT_ENDPOINT, | |
89 | ||
90 | .bEndpointAddress = USB_DIR_OUT, | |
91 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
92 | }; | |
93 | ||
94 | static struct usb_descriptor_header *fs_source_sink_descs[] = { | |
95 | (struct usb_descriptor_header *) &source_sink_intf, | |
96 | (struct usb_descriptor_header *) &fs_sink_desc, | |
97 | (struct usb_descriptor_header *) &fs_source_desc, | |
98 | NULL, | |
99 | }; | |
100 | ||
101 | /* high speed support: */ | |
102 | ||
103 | static struct usb_endpoint_descriptor hs_source_desc = { | |
104 | .bLength = USB_DT_ENDPOINT_SIZE, | |
105 | .bDescriptorType = USB_DT_ENDPOINT, | |
106 | ||
107 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 108 | .wMaxPacketSize = cpu_to_le16(512), |
a400cadc DB |
109 | }; |
110 | ||
111 | static struct usb_endpoint_descriptor hs_sink_desc = { | |
112 | .bLength = USB_DT_ENDPOINT_SIZE, | |
113 | .bDescriptorType = USB_DT_ENDPOINT, | |
114 | ||
115 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
551509d2 | 116 | .wMaxPacketSize = cpu_to_le16(512), |
a400cadc DB |
117 | }; |
118 | ||
119 | static struct usb_descriptor_header *hs_source_sink_descs[] = { | |
120 | (struct usb_descriptor_header *) &source_sink_intf, | |
121 | (struct usb_descriptor_header *) &hs_source_desc, | |
122 | (struct usb_descriptor_header *) &hs_sink_desc, | |
123 | NULL, | |
124 | }; | |
125 | ||
57c97c02 AB |
126 | /* super speed support: */ |
127 | ||
128 | static struct usb_endpoint_descriptor ss_source_desc = { | |
129 | .bLength = USB_DT_ENDPOINT_SIZE, | |
130 | .bDescriptorType = USB_DT_ENDPOINT, | |
131 | ||
132 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
133 | .wMaxPacketSize = cpu_to_le16(1024), | |
134 | }; | |
135 | ||
136 | struct usb_ss_ep_comp_descriptor ss_source_comp_desc = { | |
137 | .bLength = USB_DT_SS_EP_COMP_SIZE, | |
138 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
139 | .bMaxBurst = 0, | |
140 | .bmAttributes = 0, | |
141 | .wBytesPerInterval = 0, | |
142 | }; | |
143 | ||
144 | static struct usb_endpoint_descriptor ss_sink_desc = { | |
145 | .bLength = USB_DT_ENDPOINT_SIZE, | |
146 | .bDescriptorType = USB_DT_ENDPOINT, | |
147 | ||
148 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
149 | .wMaxPacketSize = cpu_to_le16(1024), | |
150 | }; | |
151 | ||
152 | struct usb_ss_ep_comp_descriptor ss_sink_comp_desc = { | |
153 | .bLength = USB_DT_SS_EP_COMP_SIZE, | |
154 | .bDescriptorType = USB_DT_SS_ENDPOINT_COMP, | |
155 | .bMaxBurst = 0, | |
156 | .bmAttributes = 0, | |
157 | .wBytesPerInterval = 0, | |
158 | }; | |
159 | ||
160 | static struct usb_descriptor_header *ss_source_sink_descs[] = { | |
161 | (struct usb_descriptor_header *) &source_sink_intf, | |
162 | (struct usb_descriptor_header *) &ss_source_desc, | |
163 | (struct usb_descriptor_header *) &ss_source_comp_desc, | |
164 | (struct usb_descriptor_header *) &ss_sink_desc, | |
165 | (struct usb_descriptor_header *) &ss_sink_comp_desc, | |
166 | NULL, | |
167 | }; | |
168 | ||
a400cadc DB |
169 | /* function-specific strings: */ |
170 | ||
171 | static struct usb_string strings_sourcesink[] = { | |
172 | [0].s = "source and sink data", | |
173 | { } /* end of list */ | |
174 | }; | |
175 | ||
176 | static struct usb_gadget_strings stringtab_sourcesink = { | |
177 | .language = 0x0409, /* en-us */ | |
178 | .strings = strings_sourcesink, | |
179 | }; | |
180 | ||
181 | static struct usb_gadget_strings *sourcesink_strings[] = { | |
182 | &stringtab_sourcesink, | |
183 | NULL, | |
184 | }; | |
185 | ||
186 | /*-------------------------------------------------------------------------*/ | |
187 | ||
a400cadc DB |
188 | static int __init |
189 | sourcesink_bind(struct usb_configuration *c, struct usb_function *f) | |
190 | { | |
191 | struct usb_composite_dev *cdev = c->cdev; | |
192 | struct f_sourcesink *ss = func_to_ss(f); | |
193 | int id; | |
194 | ||
195 | /* allocate interface ID(s) */ | |
196 | id = usb_interface_id(c, f); | |
197 | if (id < 0) | |
198 | return id; | |
199 | source_sink_intf.bInterfaceNumber = id; | |
200 | ||
201 | /* allocate endpoints */ | |
202 | ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc); | |
203 | if (!ss->in_ep) { | |
204 | autoconf_fail: | |
205 | ERROR(cdev, "%s: can't autoconfigure on %s\n", | |
206 | f->name, cdev->gadget->name); | |
207 | return -ENODEV; | |
208 | } | |
209 | ss->in_ep->driver_data = cdev; /* claim */ | |
210 | ||
211 | ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc); | |
212 | if (!ss->out_ep) | |
213 | goto autoconf_fail; | |
214 | ss->out_ep->driver_data = cdev; /* claim */ | |
215 | ||
a400cadc DB |
216 | /* support high speed hardware */ |
217 | if (gadget_is_dualspeed(c->cdev->gadget)) { | |
218 | hs_source_desc.bEndpointAddress = | |
219 | fs_source_desc.bEndpointAddress; | |
220 | hs_sink_desc.bEndpointAddress = | |
221 | fs_sink_desc.bEndpointAddress; | |
222 | f->hs_descriptors = hs_source_sink_descs; | |
223 | } | |
224 | ||
57c97c02 AB |
225 | /* support super speed hardware */ |
226 | if (gadget_is_superspeed(c->cdev->gadget)) { | |
227 | ss_source_desc.bEndpointAddress = | |
228 | fs_source_desc.bEndpointAddress; | |
229 | ss_sink_desc.bEndpointAddress = | |
230 | fs_sink_desc.bEndpointAddress; | |
231 | f->ss_descriptors = ss_source_sink_descs; | |
232 | } | |
233 | ||
a400cadc | 234 | DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n", |
57c97c02 AB |
235 | (gadget_is_superspeed(c->cdev->gadget) ? "super" : |
236 | (gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full")), | |
a400cadc DB |
237 | f->name, ss->in_ep->name, ss->out_ep->name); |
238 | return 0; | |
239 | } | |
240 | ||
241 | static void | |
242 | sourcesink_unbind(struct usb_configuration *c, struct usb_function *f) | |
243 | { | |
244 | kfree(func_to_ss(f)); | |
245 | } | |
246 | ||
247 | /* optionally require specific source/sink data patterns */ | |
248 | static int check_read_data(struct f_sourcesink *ss, struct usb_request *req) | |
249 | { | |
250 | unsigned i; | |
251 | u8 *buf = req->buf; | |
252 | struct usb_composite_dev *cdev = ss->function.config->cdev; | |
253 | ||
254 | for (i = 0; i < req->actual; i++, buf++) { | |
255 | switch (pattern) { | |
256 | ||
257 | /* all-zeroes has no synchronization issues */ | |
258 | case 0: | |
259 | if (*buf == 0) | |
260 | continue; | |
261 | break; | |
262 | ||
263 | /* "mod63" stays in sync with short-terminated transfers, | |
264 | * OR otherwise when host and gadget agree on how large | |
265 | * each usb transfer request should be. Resync is done | |
266 | * with set_interface or set_config. (We *WANT* it to | |
267 | * get quickly out of sync if controllers or their drivers | |
268 | * stutter for any reason, including buffer duplcation...) | |
269 | */ | |
270 | case 1: | |
271 | if (*buf == (u8)(i % 63)) | |
272 | continue; | |
273 | break; | |
274 | } | |
275 | ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf); | |
276 | usb_ep_set_halt(ss->out_ep); | |
277 | return -EINVAL; | |
278 | } | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void reinit_write_data(struct usb_ep *ep, struct usb_request *req) | |
283 | { | |
284 | unsigned i; | |
285 | u8 *buf = req->buf; | |
286 | ||
287 | switch (pattern) { | |
288 | case 0: | |
289 | memset(req->buf, 0, req->length); | |
290 | break; | |
291 | case 1: | |
292 | for (i = 0; i < req->length; i++) | |
293 | *buf++ = (u8) (i % 63); | |
294 | break; | |
295 | } | |
296 | } | |
297 | ||
298 | static void source_sink_complete(struct usb_ep *ep, struct usb_request *req) | |
299 | { | |
300 | struct f_sourcesink *ss = ep->driver_data; | |
301 | struct usb_composite_dev *cdev = ss->function.config->cdev; | |
302 | int status = req->status; | |
303 | ||
304 | switch (status) { | |
305 | ||
306 | case 0: /* normal completion? */ | |
307 | if (ep == ss->out_ep) { | |
308 | check_read_data(ss, req); | |
309 | memset(req->buf, 0x55, req->length); | |
310 | } else | |
311 | reinit_write_data(ep, req); | |
312 | break; | |
313 | ||
314 | /* this endpoint is normally active while we're configured */ | |
315 | case -ECONNABORTED: /* hardware forced ep reset */ | |
316 | case -ECONNRESET: /* request dequeued */ | |
317 | case -ESHUTDOWN: /* disconnect from host */ | |
318 | VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status, | |
319 | req->actual, req->length); | |
320 | if (ep == ss->out_ep) | |
321 | check_read_data(ss, req); | |
322 | free_ep_req(ep, req); | |
323 | return; | |
324 | ||
325 | case -EOVERFLOW: /* buffer overrun on read means that | |
326 | * we didn't provide a big enough | |
327 | * buffer. | |
328 | */ | |
329 | default: | |
330 | #if 1 | |
331 | DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name, | |
332 | status, req->actual, req->length); | |
333 | #endif | |
334 | case -EREMOTEIO: /* short read */ | |
335 | break; | |
336 | } | |
337 | ||
338 | status = usb_ep_queue(ep, req, GFP_ATOMIC); | |
339 | if (status) { | |
340 | ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n", | |
341 | ep->name, req->length, status); | |
342 | usb_ep_set_halt(ep); | |
343 | /* FIXME recover later ... somehow */ | |
344 | } | |
345 | } | |
346 | ||
347 | static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in) | |
348 | { | |
349 | struct usb_ep *ep; | |
350 | struct usb_request *req; | |
351 | int status; | |
352 | ||
353 | ep = is_in ? ss->in_ep : ss->out_ep; | |
354 | req = alloc_ep_req(ep); | |
355 | if (!req) | |
356 | return -ENOMEM; | |
357 | ||
358 | req->complete = source_sink_complete; | |
359 | if (is_in) | |
360 | reinit_write_data(ep, req); | |
361 | else | |
362 | memset(req->buf, 0x55, req->length); | |
363 | ||
364 | status = usb_ep_queue(ep, req, GFP_ATOMIC); | |
365 | if (status) { | |
366 | struct usb_composite_dev *cdev; | |
367 | ||
368 | cdev = ss->function.config->cdev; | |
369 | ERROR(cdev, "start %s %s --> %d\n", | |
370 | is_in ? "IN" : "OUT", | |
371 | ep->name, status); | |
372 | free_ep_req(ep, req); | |
373 | } | |
374 | ||
375 | return status; | |
376 | } | |
377 | ||
378 | static void disable_source_sink(struct f_sourcesink *ss) | |
379 | { | |
380 | struct usb_composite_dev *cdev; | |
381 | ||
382 | cdev = ss->function.config->cdev; | |
383 | disable_endpoints(cdev, ss->in_ep, ss->out_ep); | |
a400cadc DB |
384 | VDBG(cdev, "%s disabled\n", ss->function.name); |
385 | } | |
386 | ||
387 | static int | |
388 | enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss) | |
389 | { | |
390 | int result = 0; | |
a400cadc DB |
391 | struct usb_ep *ep; |
392 | ||
a400cadc DB |
393 | /* one endpoint writes (sources) zeroes IN (to the host) */ |
394 | ep = ss->in_ep; | |
ea2a1df7 TB |
395 | result = config_ep_by_speed(cdev->gadget, &(ss->function), ep); |
396 | if (result) | |
397 | return result; | |
72c973dd | 398 | result = usb_ep_enable(ep); |
a400cadc DB |
399 | if (result < 0) |
400 | return result; | |
401 | ep->driver_data = ss; | |
402 | ||
403 | result = source_sink_start_ep(ss, true); | |
404 | if (result < 0) { | |
405 | fail: | |
406 | ep = ss->in_ep; | |
407 | usb_ep_disable(ep); | |
408 | ep->driver_data = NULL; | |
409 | return result; | |
410 | } | |
411 | ||
412 | /* one endpoint reads (sinks) anything OUT (from the host) */ | |
413 | ep = ss->out_ep; | |
ea2a1df7 TB |
414 | result = config_ep_by_speed(cdev->gadget, &(ss->function), ep); |
415 | if (result) | |
416 | goto fail; | |
72c973dd | 417 | result = usb_ep_enable(ep); |
a400cadc DB |
418 | if (result < 0) |
419 | goto fail; | |
420 | ep->driver_data = ss; | |
421 | ||
422 | result = source_sink_start_ep(ss, false); | |
423 | if (result < 0) { | |
424 | usb_ep_disable(ep); | |
425 | ep->driver_data = NULL; | |
426 | goto fail; | |
427 | } | |
428 | ||
429 | DBG(cdev, "%s enabled\n", ss->function.name); | |
430 | return result; | |
431 | } | |
432 | ||
433 | static int sourcesink_set_alt(struct usb_function *f, | |
434 | unsigned intf, unsigned alt) | |
435 | { | |
436 | struct f_sourcesink *ss = func_to_ss(f); | |
437 | struct usb_composite_dev *cdev = f->config->cdev; | |
438 | ||
439 | /* we know alt is zero */ | |
440 | if (ss->in_ep->driver_data) | |
441 | disable_source_sink(ss); | |
442 | return enable_source_sink(cdev, ss); | |
443 | } | |
444 | ||
445 | static void sourcesink_disable(struct usb_function *f) | |
446 | { | |
447 | struct f_sourcesink *ss = func_to_ss(f); | |
448 | ||
449 | disable_source_sink(ss); | |
450 | } | |
451 | ||
a400cadc DB |
452 | /*-------------------------------------------------------------------------*/ |
453 | ||
e12995ec | 454 | static int __init sourcesink_bind_config(struct usb_configuration *c) |
a400cadc DB |
455 | { |
456 | struct f_sourcesink *ss; | |
457 | int status; | |
458 | ||
459 | ss = kzalloc(sizeof *ss, GFP_KERNEL); | |
460 | if (!ss) | |
461 | return -ENOMEM; | |
462 | ||
463 | ss->function.name = "source/sink"; | |
464 | ss->function.descriptors = fs_source_sink_descs; | |
465 | ss->function.bind = sourcesink_bind; | |
466 | ss->function.unbind = sourcesink_unbind; | |
467 | ss->function.set_alt = sourcesink_set_alt; | |
468 | ss->function.disable = sourcesink_disable; | |
a400cadc DB |
469 | |
470 | status = usb_add_function(c, &ss->function); | |
471 | if (status) | |
472 | kfree(ss); | |
473 | return status; | |
474 | } | |
475 | ||
476 | static int sourcesink_setup(struct usb_configuration *c, | |
477 | const struct usb_ctrlrequest *ctrl) | |
478 | { | |
479 | struct usb_request *req = c->cdev->req; | |
480 | int value = -EOPNOTSUPP; | |
481 | u16 w_index = le16_to_cpu(ctrl->wIndex); | |
482 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
483 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
484 | ||
5030ec73 BL |
485 | req->length = USB_BUFSIZ; |
486 | ||
a400cadc DB |
487 | /* composite driver infrastructure handles everything except |
488 | * the two control test requests. | |
489 | */ | |
490 | switch (ctrl->bRequest) { | |
491 | ||
492 | /* | |
493 | * These are the same vendor-specific requests supported by | |
494 | * Intel's USB 2.0 compliance test devices. We exceed that | |
495 | * device spec by allowing multiple-packet requests. | |
496 | * | |
497 | * NOTE: the Control-OUT data stays in req->buf ... better | |
498 | * would be copying it into a scratch buffer, so that other | |
499 | * requests may safely intervene. | |
500 | */ | |
501 | case 0x5b: /* control WRITE test -- fill the buffer */ | |
502 | if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR)) | |
503 | goto unknown; | |
504 | if (w_value || w_index) | |
505 | break; | |
506 | /* just read that many bytes into the buffer */ | |
507 | if (w_length > req->length) | |
508 | break; | |
509 | value = w_length; | |
510 | break; | |
511 | case 0x5c: /* control READ test -- return the buffer */ | |
512 | if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR)) | |
513 | goto unknown; | |
514 | if (w_value || w_index) | |
515 | break; | |
516 | /* expect those bytes are still in the buffer; send back */ | |
517 | if (w_length > req->length) | |
518 | break; | |
519 | value = w_length; | |
520 | break; | |
521 | ||
522 | default: | |
523 | unknown: | |
524 | VDBG(c->cdev, | |
525 | "unknown control req%02x.%02x v%04x i%04x l%d\n", | |
526 | ctrl->bRequestType, ctrl->bRequest, | |
527 | w_value, w_index, w_length); | |
528 | } | |
529 | ||
530 | /* respond with data transfer or status phase? */ | |
531 | if (value >= 0) { | |
532 | VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n", | |
533 | ctrl->bRequestType, ctrl->bRequest, | |
534 | w_value, w_index, w_length); | |
535 | req->zero = 0; | |
536 | req->length = value; | |
537 | value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC); | |
538 | if (value < 0) | |
539 | ERROR(c->cdev, "source/sinkc response, err %d\n", | |
540 | value); | |
541 | } | |
542 | ||
543 | /* device either stalls (value < 0) or reports success */ | |
544 | return value; | |
545 | } | |
546 | ||
547 | static struct usb_configuration sourcesink_driver = { | |
548 | .label = "source/sink", | |
549 | .strings = sourcesink_strings, | |
a400cadc DB |
550 | .setup = sourcesink_setup, |
551 | .bConfigurationValue = 3, | |
552 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
a400cadc DB |
553 | /* .iConfiguration = DYNAMIC */ |
554 | }; | |
555 | ||
556 | /** | |
557 | * sourcesink_add - add a source/sink testing configuration to a device | |
558 | * @cdev: the device to support the configuration | |
559 | */ | |
ab943a2e | 560 | int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume) |
a400cadc DB |
561 | { |
562 | int id; | |
563 | ||
564 | /* allocate string ID(s) */ | |
565 | id = usb_string_id(cdev); | |
566 | if (id < 0) | |
567 | return id; | |
568 | strings_sourcesink[0].id = id; | |
569 | ||
570 | source_sink_intf.iInterface = id; | |
571 | sourcesink_driver.iConfiguration = id; | |
572 | ||
573 | /* support autoresume for remote wakeup testing */ | |
574 | if (autoresume) | |
575 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
576 | ||
577 | /* support OTG systems */ | |
578 | if (gadget_is_otg(cdev->gadget)) { | |
579 | sourcesink_driver.descriptors = otg_desc; | |
580 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
581 | } | |
582 | ||
c9bfff9c | 583 | return usb_add_config(cdev, &sourcesink_driver, sourcesink_bind_config); |
a400cadc | 584 | } |