Commit | Line | Data |
---|---|---|
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. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | /* #define VERBOSE_DEBUG */ | |
23 | ||
24 | #include <linux/kernel.h> | |
25 | #include <linux/utsname.h> | |
26 | #include <linux/device.h> | |
27 | ||
28 | #include "g_zero.h" | |
29 | #include "gadget_chips.h" | |
30 | ||
31 | ||
32 | /* | |
33 | * SOURCE/SINK FUNCTION ... a primary testing vehicle for USB peripheral | |
34 | * controller drivers. | |
35 | * | |
36 | * This just sinks bulk packets OUT to the peripheral and sources them IN | |
37 | * to the host, optionally with specific data patterns for integrity tests. | |
38 | * As such it supports basic functionality and load tests. | |
39 | * | |
40 | * In terms of control messaging, this supports all the standard requests | |
41 | * plus two that support control-OUT tests. If the optional "autoresume" | |
42 | * mode is enabled, it provides good functional coverage for the "USBCV" | |
43 | * test harness from USB-IF. | |
44 | * | |
45 | * Note that because this doesn't queue more than one request at a time, | |
46 | * some other function must be used to test queueing logic. The network | |
47 | * link (g_ether) is the best overall option for that, since its TX and RX | |
48 | * queues are relatively independent, will receive a range of packet sizes, | |
49 | * and can often be made to run out completely. Those issues are important | |
50 | * when stress testing peripheral controller drivers. | |
51 | * | |
52 | * | |
53 | * This is currently packaged as a configuration driver, which can't be | |
54 | * combined with other functions to make composite devices. However, it | |
55 | * can be combined with other independent configurations. | |
56 | */ | |
57 | struct f_sourcesink { | |
58 | struct usb_function function; | |
59 | ||
60 | struct usb_ep *in_ep; | |
61 | struct usb_ep *out_ep; | |
62 | struct timer_list resume; | |
63 | }; | |
64 | ||
65 | static inline struct f_sourcesink *func_to_ss(struct usb_function *f) | |
66 | { | |
67 | return container_of(f, struct f_sourcesink, function); | |
68 | } | |
69 | ||
70 | static unsigned autoresume; | |
71 | module_param(autoresume, uint, 0); | |
72 | MODULE_PARM_DESC(autoresume, "zero, or seconds before remote wakeup"); | |
73 | ||
74 | static unsigned pattern; | |
75 | module_param(pattern, uint, 0); | |
76 | MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 "); | |
77 | ||
78 | /*-------------------------------------------------------------------------*/ | |
79 | ||
80 | static struct usb_interface_descriptor source_sink_intf = { | |
81 | .bLength = sizeof source_sink_intf, | |
82 | .bDescriptorType = USB_DT_INTERFACE, | |
83 | ||
84 | .bNumEndpoints = 2, | |
85 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, | |
86 | /* .iInterface = DYNAMIC */ | |
87 | }; | |
88 | ||
89 | /* full speed support: */ | |
90 | ||
91 | static struct usb_endpoint_descriptor fs_source_desc = { | |
92 | .bLength = USB_DT_ENDPOINT_SIZE, | |
93 | .bDescriptorType = USB_DT_ENDPOINT, | |
94 | ||
95 | .bEndpointAddress = USB_DIR_IN, | |
96 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
97 | }; | |
98 | ||
99 | static struct usb_endpoint_descriptor fs_sink_desc = { | |
100 | .bLength = USB_DT_ENDPOINT_SIZE, | |
101 | .bDescriptorType = USB_DT_ENDPOINT, | |
102 | ||
103 | .bEndpointAddress = USB_DIR_OUT, | |
104 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
105 | }; | |
106 | ||
107 | static struct usb_descriptor_header *fs_source_sink_descs[] = { | |
108 | (struct usb_descriptor_header *) &source_sink_intf, | |
109 | (struct usb_descriptor_header *) &fs_sink_desc, | |
110 | (struct usb_descriptor_header *) &fs_source_desc, | |
111 | NULL, | |
112 | }; | |
113 | ||
114 | /* high speed support: */ | |
115 | ||
116 | static struct usb_endpoint_descriptor hs_source_desc = { | |
117 | .bLength = USB_DT_ENDPOINT_SIZE, | |
118 | .bDescriptorType = USB_DT_ENDPOINT, | |
119 | ||
120 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
121 | .wMaxPacketSize = __constant_cpu_to_le16(512), | |
122 | }; | |
123 | ||
124 | static struct usb_endpoint_descriptor hs_sink_desc = { | |
125 | .bLength = USB_DT_ENDPOINT_SIZE, | |
126 | .bDescriptorType = USB_DT_ENDPOINT, | |
127 | ||
128 | .bmAttributes = USB_ENDPOINT_XFER_BULK, | |
129 | .wMaxPacketSize = __constant_cpu_to_le16(512), | |
130 | }; | |
131 | ||
132 | static struct usb_descriptor_header *hs_source_sink_descs[] = { | |
133 | (struct usb_descriptor_header *) &source_sink_intf, | |
134 | (struct usb_descriptor_header *) &hs_source_desc, | |
135 | (struct usb_descriptor_header *) &hs_sink_desc, | |
136 | NULL, | |
137 | }; | |
138 | ||
139 | /* function-specific strings: */ | |
140 | ||
141 | static struct usb_string strings_sourcesink[] = { | |
142 | [0].s = "source and sink data", | |
143 | { } /* end of list */ | |
144 | }; | |
145 | ||
146 | static struct usb_gadget_strings stringtab_sourcesink = { | |
147 | .language = 0x0409, /* en-us */ | |
148 | .strings = strings_sourcesink, | |
149 | }; | |
150 | ||
151 | static struct usb_gadget_strings *sourcesink_strings[] = { | |
152 | &stringtab_sourcesink, | |
153 | NULL, | |
154 | }; | |
155 | ||
156 | /*-------------------------------------------------------------------------*/ | |
157 | ||
158 | static void sourcesink_autoresume(unsigned long _c) | |
159 | { | |
160 | struct usb_composite_dev *cdev = (void *)_c; | |
161 | struct usb_gadget *g = cdev->gadget; | |
162 | ||
163 | /* Normally the host would be woken up for something | |
164 | * more significant than just a timer firing; likely | |
165 | * because of some direct user request. | |
166 | */ | |
167 | if (g->speed != USB_SPEED_UNKNOWN) { | |
168 | int status = usb_gadget_wakeup(g); | |
169 | DBG(cdev, "%s --> %d\n", __func__, status); | |
170 | } | |
171 | } | |
172 | ||
173 | static int __init | |
174 | sourcesink_bind(struct usb_configuration *c, struct usb_function *f) | |
175 | { | |
176 | struct usb_composite_dev *cdev = c->cdev; | |
177 | struct f_sourcesink *ss = func_to_ss(f); | |
178 | int id; | |
179 | ||
180 | /* allocate interface ID(s) */ | |
181 | id = usb_interface_id(c, f); | |
182 | if (id < 0) | |
183 | return id; | |
184 | source_sink_intf.bInterfaceNumber = id; | |
185 | ||
186 | /* allocate endpoints */ | |
187 | ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc); | |
188 | if (!ss->in_ep) { | |
189 | autoconf_fail: | |
190 | ERROR(cdev, "%s: can't autoconfigure on %s\n", | |
191 | f->name, cdev->gadget->name); | |
192 | return -ENODEV; | |
193 | } | |
194 | ss->in_ep->driver_data = cdev; /* claim */ | |
195 | ||
196 | ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc); | |
197 | if (!ss->out_ep) | |
198 | goto autoconf_fail; | |
199 | ss->out_ep->driver_data = cdev; /* claim */ | |
200 | ||
201 | setup_timer(&ss->resume, sourcesink_autoresume, | |
202 | (unsigned long) c->cdev); | |
203 | ||
204 | /* support high speed hardware */ | |
205 | if (gadget_is_dualspeed(c->cdev->gadget)) { | |
206 | hs_source_desc.bEndpointAddress = | |
207 | fs_source_desc.bEndpointAddress; | |
208 | hs_sink_desc.bEndpointAddress = | |
209 | fs_sink_desc.bEndpointAddress; | |
210 | f->hs_descriptors = hs_source_sink_descs; | |
211 | } | |
212 | ||
213 | DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n", | |
214 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", | |
215 | f->name, ss->in_ep->name, ss->out_ep->name); | |
216 | return 0; | |
217 | } | |
218 | ||
219 | static void | |
220 | sourcesink_unbind(struct usb_configuration *c, struct usb_function *f) | |
221 | { | |
222 | kfree(func_to_ss(f)); | |
223 | } | |
224 | ||
225 | /* optionally require specific source/sink data patterns */ | |
226 | static int check_read_data(struct f_sourcesink *ss, struct usb_request *req) | |
227 | { | |
228 | unsigned i; | |
229 | u8 *buf = req->buf; | |
230 | struct usb_composite_dev *cdev = ss->function.config->cdev; | |
231 | ||
232 | for (i = 0; i < req->actual; i++, buf++) { | |
233 | switch (pattern) { | |
234 | ||
235 | /* all-zeroes has no synchronization issues */ | |
236 | case 0: | |
237 | if (*buf == 0) | |
238 | continue; | |
239 | break; | |
240 | ||
241 | /* "mod63" stays in sync with short-terminated transfers, | |
242 | * OR otherwise when host and gadget agree on how large | |
243 | * each usb transfer request should be. Resync is done | |
244 | * with set_interface or set_config. (We *WANT* it to | |
245 | * get quickly out of sync if controllers or their drivers | |
246 | * stutter for any reason, including buffer duplcation...) | |
247 | */ | |
248 | case 1: | |
249 | if (*buf == (u8)(i % 63)) | |
250 | continue; | |
251 | break; | |
252 | } | |
253 | ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf); | |
254 | usb_ep_set_halt(ss->out_ep); | |
255 | return -EINVAL; | |
256 | } | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static void reinit_write_data(struct usb_ep *ep, struct usb_request *req) | |
261 | { | |
262 | unsigned i; | |
263 | u8 *buf = req->buf; | |
264 | ||
265 | switch (pattern) { | |
266 | case 0: | |
267 | memset(req->buf, 0, req->length); | |
268 | break; | |
269 | case 1: | |
270 | for (i = 0; i < req->length; i++) | |
271 | *buf++ = (u8) (i % 63); | |
272 | break; | |
273 | } | |
274 | } | |
275 | ||
276 | static void source_sink_complete(struct usb_ep *ep, struct usb_request *req) | |
277 | { | |
278 | struct f_sourcesink *ss = ep->driver_data; | |
279 | struct usb_composite_dev *cdev = ss->function.config->cdev; | |
280 | int status = req->status; | |
281 | ||
282 | switch (status) { | |
283 | ||
284 | case 0: /* normal completion? */ | |
285 | if (ep == ss->out_ep) { | |
286 | check_read_data(ss, req); | |
287 | memset(req->buf, 0x55, req->length); | |
288 | } else | |
289 | reinit_write_data(ep, req); | |
290 | break; | |
291 | ||
292 | /* this endpoint is normally active while we're configured */ | |
293 | case -ECONNABORTED: /* hardware forced ep reset */ | |
294 | case -ECONNRESET: /* request dequeued */ | |
295 | case -ESHUTDOWN: /* disconnect from host */ | |
296 | VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status, | |
297 | req->actual, req->length); | |
298 | if (ep == ss->out_ep) | |
299 | check_read_data(ss, req); | |
300 | free_ep_req(ep, req); | |
301 | return; | |
302 | ||
303 | case -EOVERFLOW: /* buffer overrun on read means that | |
304 | * we didn't provide a big enough | |
305 | * buffer. | |
306 | */ | |
307 | default: | |
308 | #if 1 | |
309 | DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name, | |
310 | status, req->actual, req->length); | |
311 | #endif | |
312 | case -EREMOTEIO: /* short read */ | |
313 | break; | |
314 | } | |
315 | ||
316 | status = usb_ep_queue(ep, req, GFP_ATOMIC); | |
317 | if (status) { | |
318 | ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n", | |
319 | ep->name, req->length, status); | |
320 | usb_ep_set_halt(ep); | |
321 | /* FIXME recover later ... somehow */ | |
322 | } | |
323 | } | |
324 | ||
325 | static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in) | |
326 | { | |
327 | struct usb_ep *ep; | |
328 | struct usb_request *req; | |
329 | int status; | |
330 | ||
331 | ep = is_in ? ss->in_ep : ss->out_ep; | |
332 | req = alloc_ep_req(ep); | |
333 | if (!req) | |
334 | return -ENOMEM; | |
335 | ||
336 | req->complete = source_sink_complete; | |
337 | if (is_in) | |
338 | reinit_write_data(ep, req); | |
339 | else | |
340 | memset(req->buf, 0x55, req->length); | |
341 | ||
342 | status = usb_ep_queue(ep, req, GFP_ATOMIC); | |
343 | if (status) { | |
344 | struct usb_composite_dev *cdev; | |
345 | ||
346 | cdev = ss->function.config->cdev; | |
347 | ERROR(cdev, "start %s %s --> %d\n", | |
348 | is_in ? "IN" : "OUT", | |
349 | ep->name, status); | |
350 | free_ep_req(ep, req); | |
351 | } | |
352 | ||
353 | return status; | |
354 | } | |
355 | ||
356 | static void disable_source_sink(struct f_sourcesink *ss) | |
357 | { | |
358 | struct usb_composite_dev *cdev; | |
359 | ||
360 | cdev = ss->function.config->cdev; | |
361 | disable_endpoints(cdev, ss->in_ep, ss->out_ep); | |
362 | del_timer(&ss->resume); | |
363 | VDBG(cdev, "%s disabled\n", ss->function.name); | |
364 | } | |
365 | ||
366 | static int | |
367 | enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss) | |
368 | { | |
369 | int result = 0; | |
370 | const struct usb_endpoint_descriptor *src, *sink; | |
371 | struct usb_ep *ep; | |
372 | ||
373 | src = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc); | |
374 | sink = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc); | |
375 | ||
376 | /* one endpoint writes (sources) zeroes IN (to the host) */ | |
377 | ep = ss->in_ep; | |
378 | result = usb_ep_enable(ep, src); | |
379 | if (result < 0) | |
380 | return result; | |
381 | ep->driver_data = ss; | |
382 | ||
383 | result = source_sink_start_ep(ss, true); | |
384 | if (result < 0) { | |
385 | fail: | |
386 | ep = ss->in_ep; | |
387 | usb_ep_disable(ep); | |
388 | ep->driver_data = NULL; | |
389 | return result; | |
390 | } | |
391 | ||
392 | /* one endpoint reads (sinks) anything OUT (from the host) */ | |
393 | ep = ss->out_ep; | |
394 | result = usb_ep_enable(ep, sink); | |
395 | if (result < 0) | |
396 | goto fail; | |
397 | ep->driver_data = ss; | |
398 | ||
399 | result = source_sink_start_ep(ss, false); | |
400 | if (result < 0) { | |
401 | usb_ep_disable(ep); | |
402 | ep->driver_data = NULL; | |
403 | goto fail; | |
404 | } | |
405 | ||
406 | DBG(cdev, "%s enabled\n", ss->function.name); | |
407 | return result; | |
408 | } | |
409 | ||
410 | static int sourcesink_set_alt(struct usb_function *f, | |
411 | unsigned intf, unsigned alt) | |
412 | { | |
413 | struct f_sourcesink *ss = func_to_ss(f); | |
414 | struct usb_composite_dev *cdev = f->config->cdev; | |
415 | ||
416 | /* we know alt is zero */ | |
417 | if (ss->in_ep->driver_data) | |
418 | disable_source_sink(ss); | |
419 | return enable_source_sink(cdev, ss); | |
420 | } | |
421 | ||
422 | static void sourcesink_disable(struct usb_function *f) | |
423 | { | |
424 | struct f_sourcesink *ss = func_to_ss(f); | |
425 | ||
426 | disable_source_sink(ss); | |
427 | } | |
428 | ||
429 | static void sourcesink_suspend(struct usb_function *f) | |
430 | { | |
431 | struct f_sourcesink *ss = func_to_ss(f); | |
432 | struct usb_composite_dev *cdev = f->config->cdev; | |
433 | ||
434 | if (cdev->gadget->speed == USB_SPEED_UNKNOWN) | |
435 | return; | |
436 | ||
437 | if (autoresume) { | |
438 | mod_timer(&ss->resume, jiffies + (HZ * autoresume)); | |
439 | DBG(cdev, "suspend, wakeup in %d seconds\n", autoresume); | |
440 | } else | |
441 | DBG(cdev, "%s\n", __func__); | |
442 | } | |
443 | ||
444 | static void sourcesink_resume(struct usb_function *f) | |
445 | { | |
446 | struct f_sourcesink *ss = func_to_ss(f); | |
447 | struct usb_composite_dev *cdev = f->config->cdev; | |
448 | ||
449 | DBG(cdev, "%s\n", __func__); | |
450 | del_timer(&ss->resume); | |
451 | } | |
452 | ||
453 | /*-------------------------------------------------------------------------*/ | |
454 | ||
455 | static int __init sourcesink_bind_config(struct usb_configuration *c) | |
456 | { | |
457 | struct f_sourcesink *ss; | |
458 | int status; | |
459 | ||
460 | ss = kzalloc(sizeof *ss, GFP_KERNEL); | |
461 | if (!ss) | |
462 | return -ENOMEM; | |
463 | ||
464 | ss->function.name = "source/sink"; | |
465 | ss->function.descriptors = fs_source_sink_descs; | |
466 | ss->function.bind = sourcesink_bind; | |
467 | ss->function.unbind = sourcesink_unbind; | |
468 | ss->function.set_alt = sourcesink_set_alt; | |
469 | ss->function.disable = sourcesink_disable; | |
470 | ss->function.suspend = sourcesink_suspend; | |
471 | ss->function.resume = sourcesink_resume; | |
472 | ||
473 | status = usb_add_function(c, &ss->function); | |
474 | if (status) | |
475 | kfree(ss); | |
476 | return status; | |
477 | } | |
478 | ||
479 | static int sourcesink_setup(struct usb_configuration *c, | |
480 | const struct usb_ctrlrequest *ctrl) | |
481 | { | |
482 | struct usb_request *req = c->cdev->req; | |
483 | int value = -EOPNOTSUPP; | |
484 | u16 w_index = le16_to_cpu(ctrl->wIndex); | |
485 | u16 w_value = le16_to_cpu(ctrl->wValue); | |
486 | u16 w_length = le16_to_cpu(ctrl->wLength); | |
487 | ||
488 | /* composite driver infrastructure handles everything except | |
489 | * the two control test requests. | |
490 | */ | |
491 | switch (ctrl->bRequest) { | |
492 | ||
493 | /* | |
494 | * These are the same vendor-specific requests supported by | |
495 | * Intel's USB 2.0 compliance test devices. We exceed that | |
496 | * device spec by allowing multiple-packet requests. | |
497 | * | |
498 | * NOTE: the Control-OUT data stays in req->buf ... better | |
499 | * would be copying it into a scratch buffer, so that other | |
500 | * requests may safely intervene. | |
501 | */ | |
502 | case 0x5b: /* control WRITE test -- fill the buffer */ | |
503 | if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR)) | |
504 | goto unknown; | |
505 | if (w_value || w_index) | |
506 | break; | |
507 | /* just read that many bytes into the buffer */ | |
508 | if (w_length > req->length) | |
509 | break; | |
510 | value = w_length; | |
511 | break; | |
512 | case 0x5c: /* control READ test -- return the buffer */ | |
513 | if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR)) | |
514 | goto unknown; | |
515 | if (w_value || w_index) | |
516 | break; | |
517 | /* expect those bytes are still in the buffer; send back */ | |
518 | if (w_length > req->length) | |
519 | break; | |
520 | value = w_length; | |
521 | break; | |
522 | ||
523 | default: | |
524 | unknown: | |
525 | VDBG(c->cdev, | |
526 | "unknown control req%02x.%02x v%04x i%04x l%d\n", | |
527 | ctrl->bRequestType, ctrl->bRequest, | |
528 | w_value, w_index, w_length); | |
529 | } | |
530 | ||
531 | /* respond with data transfer or status phase? */ | |
532 | if (value >= 0) { | |
533 | VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n", | |
534 | ctrl->bRequestType, ctrl->bRequest, | |
535 | w_value, w_index, w_length); | |
536 | req->zero = 0; | |
537 | req->length = value; | |
538 | value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC); | |
539 | if (value < 0) | |
540 | ERROR(c->cdev, "source/sinkc response, err %d\n", | |
541 | value); | |
542 | } | |
543 | ||
544 | /* device either stalls (value < 0) or reports success */ | |
545 | return value; | |
546 | } | |
547 | ||
548 | static struct usb_configuration sourcesink_driver = { | |
549 | .label = "source/sink", | |
550 | .strings = sourcesink_strings, | |
551 | .bind = sourcesink_bind_config, | |
552 | .setup = sourcesink_setup, | |
553 | .bConfigurationValue = 3, | |
554 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, | |
555 | .bMaxPower = 1, /* 2 mA, minimal */ | |
556 | /* .iConfiguration = DYNAMIC */ | |
557 | }; | |
558 | ||
559 | /** | |
560 | * sourcesink_add - add a source/sink testing configuration to a device | |
561 | * @cdev: the device to support the configuration | |
562 | */ | |
563 | int __init sourcesink_add(struct usb_composite_dev *cdev) | |
564 | { | |
565 | int id; | |
566 | ||
567 | /* allocate string ID(s) */ | |
568 | id = usb_string_id(cdev); | |
569 | if (id < 0) | |
570 | return id; | |
571 | strings_sourcesink[0].id = id; | |
572 | ||
573 | source_sink_intf.iInterface = id; | |
574 | sourcesink_driver.iConfiguration = id; | |
575 | ||
576 | /* support autoresume for remote wakeup testing */ | |
577 | if (autoresume) | |
578 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
579 | ||
580 | /* support OTG systems */ | |
581 | if (gadget_is_otg(cdev->gadget)) { | |
582 | sourcesink_driver.descriptors = otg_desc; | |
583 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; | |
584 | } | |
585 | ||
586 | return usb_add_config(cdev, &sourcesink_driver); | |
587 | } |