David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 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; |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 62 | }; |
| 63 | |
| 64 | static inline struct f_sourcesink *func_to_ss(struct usb_function *f) |
| 65 | { |
| 66 | return container_of(f, struct f_sourcesink, function); |
| 67 | } |
| 68 | |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 69 | static unsigned pattern; |
| 70 | module_param(pattern, uint, 0); |
| 71 | MODULE_PARM_DESC(pattern, "0 = all zeroes, 1 = mod63 "); |
| 72 | |
| 73 | /*-------------------------------------------------------------------------*/ |
| 74 | |
| 75 | static struct usb_interface_descriptor source_sink_intf = { |
| 76 | .bLength = sizeof source_sink_intf, |
| 77 | .bDescriptorType = USB_DT_INTERFACE, |
| 78 | |
| 79 | .bNumEndpoints = 2, |
| 80 | .bInterfaceClass = USB_CLASS_VENDOR_SPEC, |
| 81 | /* .iInterface = DYNAMIC */ |
| 82 | }; |
| 83 | |
| 84 | /* full speed support: */ |
| 85 | |
| 86 | static struct usb_endpoint_descriptor fs_source_desc = { |
| 87 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 88 | .bDescriptorType = USB_DT_ENDPOINT, |
| 89 | |
| 90 | .bEndpointAddress = USB_DIR_IN, |
| 91 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 92 | }; |
| 93 | |
| 94 | static struct usb_endpoint_descriptor fs_sink_desc = { |
| 95 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 96 | .bDescriptorType = USB_DT_ENDPOINT, |
| 97 | |
| 98 | .bEndpointAddress = USB_DIR_OUT, |
| 99 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 100 | }; |
| 101 | |
| 102 | static struct usb_descriptor_header *fs_source_sink_descs[] = { |
| 103 | (struct usb_descriptor_header *) &source_sink_intf, |
| 104 | (struct usb_descriptor_header *) &fs_sink_desc, |
| 105 | (struct usb_descriptor_header *) &fs_source_desc, |
| 106 | NULL, |
| 107 | }; |
| 108 | |
| 109 | /* high speed support: */ |
| 110 | |
| 111 | static struct usb_endpoint_descriptor hs_source_desc = { |
| 112 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 113 | .bDescriptorType = USB_DT_ENDPOINT, |
| 114 | |
| 115 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 116 | .wMaxPacketSize = cpu_to_le16(512), |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | static struct usb_endpoint_descriptor hs_sink_desc = { |
| 120 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 121 | .bDescriptorType = USB_DT_ENDPOINT, |
| 122 | |
| 123 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 124 | .wMaxPacketSize = cpu_to_le16(512), |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 125 | }; |
| 126 | |
| 127 | static struct usb_descriptor_header *hs_source_sink_descs[] = { |
| 128 | (struct usb_descriptor_header *) &source_sink_intf, |
| 129 | (struct usb_descriptor_header *) &hs_source_desc, |
| 130 | (struct usb_descriptor_header *) &hs_sink_desc, |
| 131 | NULL, |
| 132 | }; |
| 133 | |
| 134 | /* function-specific strings: */ |
| 135 | |
| 136 | static struct usb_string strings_sourcesink[] = { |
| 137 | [0].s = "source and sink data", |
| 138 | { } /* end of list */ |
| 139 | }; |
| 140 | |
| 141 | static struct usb_gadget_strings stringtab_sourcesink = { |
| 142 | .language = 0x0409, /* en-us */ |
| 143 | .strings = strings_sourcesink, |
| 144 | }; |
| 145 | |
| 146 | static struct usb_gadget_strings *sourcesink_strings[] = { |
| 147 | &stringtab_sourcesink, |
| 148 | NULL, |
| 149 | }; |
| 150 | |
| 151 | /*-------------------------------------------------------------------------*/ |
| 152 | |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 153 | static int __init |
| 154 | sourcesink_bind(struct usb_configuration *c, struct usb_function *f) |
| 155 | { |
| 156 | struct usb_composite_dev *cdev = c->cdev; |
| 157 | struct f_sourcesink *ss = func_to_ss(f); |
| 158 | int id; |
| 159 | |
| 160 | /* allocate interface ID(s) */ |
| 161 | id = usb_interface_id(c, f); |
| 162 | if (id < 0) |
| 163 | return id; |
| 164 | source_sink_intf.bInterfaceNumber = id; |
| 165 | |
| 166 | /* allocate endpoints */ |
| 167 | ss->in_ep = usb_ep_autoconfig(cdev->gadget, &fs_source_desc); |
| 168 | if (!ss->in_ep) { |
| 169 | autoconf_fail: |
| 170 | ERROR(cdev, "%s: can't autoconfigure on %s\n", |
| 171 | f->name, cdev->gadget->name); |
| 172 | return -ENODEV; |
| 173 | } |
| 174 | ss->in_ep->driver_data = cdev; /* claim */ |
| 175 | |
| 176 | ss->out_ep = usb_ep_autoconfig(cdev->gadget, &fs_sink_desc); |
| 177 | if (!ss->out_ep) |
| 178 | goto autoconf_fail; |
| 179 | ss->out_ep->driver_data = cdev; /* claim */ |
| 180 | |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 181 | /* support high speed hardware */ |
| 182 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
| 183 | hs_source_desc.bEndpointAddress = |
| 184 | fs_source_desc.bEndpointAddress; |
| 185 | hs_sink_desc.bEndpointAddress = |
| 186 | fs_sink_desc.bEndpointAddress; |
| 187 | f->hs_descriptors = hs_source_sink_descs; |
| 188 | } |
| 189 | |
| 190 | DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n", |
| 191 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", |
| 192 | f->name, ss->in_ep->name, ss->out_ep->name); |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static void |
| 197 | sourcesink_unbind(struct usb_configuration *c, struct usb_function *f) |
| 198 | { |
| 199 | kfree(func_to_ss(f)); |
| 200 | } |
| 201 | |
| 202 | /* optionally require specific source/sink data patterns */ |
| 203 | static int check_read_data(struct f_sourcesink *ss, struct usb_request *req) |
| 204 | { |
| 205 | unsigned i; |
| 206 | u8 *buf = req->buf; |
| 207 | struct usb_composite_dev *cdev = ss->function.config->cdev; |
| 208 | |
| 209 | for (i = 0; i < req->actual; i++, buf++) { |
| 210 | switch (pattern) { |
| 211 | |
| 212 | /* all-zeroes has no synchronization issues */ |
| 213 | case 0: |
| 214 | if (*buf == 0) |
| 215 | continue; |
| 216 | break; |
| 217 | |
| 218 | /* "mod63" stays in sync with short-terminated transfers, |
| 219 | * OR otherwise when host and gadget agree on how large |
| 220 | * each usb transfer request should be. Resync is done |
| 221 | * with set_interface or set_config. (We *WANT* it to |
| 222 | * get quickly out of sync if controllers or their drivers |
| 223 | * stutter for any reason, including buffer duplcation...) |
| 224 | */ |
| 225 | case 1: |
| 226 | if (*buf == (u8)(i % 63)) |
| 227 | continue; |
| 228 | break; |
| 229 | } |
| 230 | ERROR(cdev, "bad OUT byte, buf[%d] = %d\n", i, *buf); |
| 231 | usb_ep_set_halt(ss->out_ep); |
| 232 | return -EINVAL; |
| 233 | } |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static void reinit_write_data(struct usb_ep *ep, struct usb_request *req) |
| 238 | { |
| 239 | unsigned i; |
| 240 | u8 *buf = req->buf; |
| 241 | |
| 242 | switch (pattern) { |
| 243 | case 0: |
| 244 | memset(req->buf, 0, req->length); |
| 245 | break; |
| 246 | case 1: |
| 247 | for (i = 0; i < req->length; i++) |
| 248 | *buf++ = (u8) (i % 63); |
| 249 | break; |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | static void source_sink_complete(struct usb_ep *ep, struct usb_request *req) |
| 254 | { |
| 255 | struct f_sourcesink *ss = ep->driver_data; |
| 256 | struct usb_composite_dev *cdev = ss->function.config->cdev; |
| 257 | int status = req->status; |
| 258 | |
| 259 | switch (status) { |
| 260 | |
| 261 | case 0: /* normal completion? */ |
| 262 | if (ep == ss->out_ep) { |
| 263 | check_read_data(ss, req); |
| 264 | memset(req->buf, 0x55, req->length); |
| 265 | } else |
| 266 | reinit_write_data(ep, req); |
| 267 | break; |
| 268 | |
| 269 | /* this endpoint is normally active while we're configured */ |
| 270 | case -ECONNABORTED: /* hardware forced ep reset */ |
| 271 | case -ECONNRESET: /* request dequeued */ |
| 272 | case -ESHUTDOWN: /* disconnect from host */ |
| 273 | VDBG(cdev, "%s gone (%d), %d/%d\n", ep->name, status, |
| 274 | req->actual, req->length); |
| 275 | if (ep == ss->out_ep) |
| 276 | check_read_data(ss, req); |
| 277 | free_ep_req(ep, req); |
| 278 | return; |
| 279 | |
| 280 | case -EOVERFLOW: /* buffer overrun on read means that |
| 281 | * we didn't provide a big enough |
| 282 | * buffer. |
| 283 | */ |
| 284 | default: |
| 285 | #if 1 |
| 286 | DBG(cdev, "%s complete --> %d, %d/%d\n", ep->name, |
| 287 | status, req->actual, req->length); |
| 288 | #endif |
| 289 | case -EREMOTEIO: /* short read */ |
| 290 | break; |
| 291 | } |
| 292 | |
| 293 | status = usb_ep_queue(ep, req, GFP_ATOMIC); |
| 294 | if (status) { |
| 295 | ERROR(cdev, "kill %s: resubmit %d bytes --> %d\n", |
| 296 | ep->name, req->length, status); |
| 297 | usb_ep_set_halt(ep); |
| 298 | /* FIXME recover later ... somehow */ |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | static int source_sink_start_ep(struct f_sourcesink *ss, bool is_in) |
| 303 | { |
| 304 | struct usb_ep *ep; |
| 305 | struct usb_request *req; |
| 306 | int status; |
| 307 | |
| 308 | ep = is_in ? ss->in_ep : ss->out_ep; |
| 309 | req = alloc_ep_req(ep); |
| 310 | if (!req) |
| 311 | return -ENOMEM; |
| 312 | |
| 313 | req->complete = source_sink_complete; |
| 314 | if (is_in) |
| 315 | reinit_write_data(ep, req); |
| 316 | else |
| 317 | memset(req->buf, 0x55, req->length); |
| 318 | |
| 319 | status = usb_ep_queue(ep, req, GFP_ATOMIC); |
| 320 | if (status) { |
| 321 | struct usb_composite_dev *cdev; |
| 322 | |
| 323 | cdev = ss->function.config->cdev; |
| 324 | ERROR(cdev, "start %s %s --> %d\n", |
| 325 | is_in ? "IN" : "OUT", |
| 326 | ep->name, status); |
| 327 | free_ep_req(ep, req); |
| 328 | } |
| 329 | |
| 330 | return status; |
| 331 | } |
| 332 | |
| 333 | static void disable_source_sink(struct f_sourcesink *ss) |
| 334 | { |
| 335 | struct usb_composite_dev *cdev; |
| 336 | |
| 337 | cdev = ss->function.config->cdev; |
| 338 | disable_endpoints(cdev, ss->in_ep, ss->out_ep); |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 339 | VDBG(cdev, "%s disabled\n", ss->function.name); |
| 340 | } |
| 341 | |
| 342 | static int |
| 343 | enable_source_sink(struct usb_composite_dev *cdev, struct f_sourcesink *ss) |
| 344 | { |
| 345 | int result = 0; |
| 346 | const struct usb_endpoint_descriptor *src, *sink; |
| 347 | struct usb_ep *ep; |
| 348 | |
| 349 | src = ep_choose(cdev->gadget, &hs_source_desc, &fs_source_desc); |
| 350 | sink = ep_choose(cdev->gadget, &hs_sink_desc, &fs_sink_desc); |
| 351 | |
| 352 | /* one endpoint writes (sources) zeroes IN (to the host) */ |
| 353 | ep = ss->in_ep; |
| 354 | result = usb_ep_enable(ep, src); |
| 355 | if (result < 0) |
| 356 | return result; |
| 357 | ep->driver_data = ss; |
| 358 | |
| 359 | result = source_sink_start_ep(ss, true); |
| 360 | if (result < 0) { |
| 361 | fail: |
| 362 | ep = ss->in_ep; |
| 363 | usb_ep_disable(ep); |
| 364 | ep->driver_data = NULL; |
| 365 | return result; |
| 366 | } |
| 367 | |
| 368 | /* one endpoint reads (sinks) anything OUT (from the host) */ |
| 369 | ep = ss->out_ep; |
| 370 | result = usb_ep_enable(ep, sink); |
| 371 | if (result < 0) |
| 372 | goto fail; |
| 373 | ep->driver_data = ss; |
| 374 | |
| 375 | result = source_sink_start_ep(ss, false); |
| 376 | if (result < 0) { |
| 377 | usb_ep_disable(ep); |
| 378 | ep->driver_data = NULL; |
| 379 | goto fail; |
| 380 | } |
| 381 | |
| 382 | DBG(cdev, "%s enabled\n", ss->function.name); |
| 383 | return result; |
| 384 | } |
| 385 | |
| 386 | static int sourcesink_set_alt(struct usb_function *f, |
| 387 | unsigned intf, unsigned alt) |
| 388 | { |
| 389 | struct f_sourcesink *ss = func_to_ss(f); |
| 390 | struct usb_composite_dev *cdev = f->config->cdev; |
| 391 | |
| 392 | /* we know alt is zero */ |
| 393 | if (ss->in_ep->driver_data) |
| 394 | disable_source_sink(ss); |
| 395 | return enable_source_sink(cdev, ss); |
| 396 | } |
| 397 | |
| 398 | static void sourcesink_disable(struct usb_function *f) |
| 399 | { |
| 400 | struct f_sourcesink *ss = func_to_ss(f); |
| 401 | |
| 402 | disable_source_sink(ss); |
| 403 | } |
| 404 | |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 405 | /*-------------------------------------------------------------------------*/ |
| 406 | |
| 407 | static int __init sourcesink_bind_config(struct usb_configuration *c) |
| 408 | { |
| 409 | struct f_sourcesink *ss; |
| 410 | int status; |
| 411 | |
| 412 | ss = kzalloc(sizeof *ss, GFP_KERNEL); |
| 413 | if (!ss) |
| 414 | return -ENOMEM; |
| 415 | |
| 416 | ss->function.name = "source/sink"; |
| 417 | ss->function.descriptors = fs_source_sink_descs; |
| 418 | ss->function.bind = sourcesink_bind; |
| 419 | ss->function.unbind = sourcesink_unbind; |
| 420 | ss->function.set_alt = sourcesink_set_alt; |
| 421 | ss->function.disable = sourcesink_disable; |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 422 | |
| 423 | status = usb_add_function(c, &ss->function); |
| 424 | if (status) |
| 425 | kfree(ss); |
| 426 | return status; |
| 427 | } |
| 428 | |
| 429 | static int sourcesink_setup(struct usb_configuration *c, |
| 430 | const struct usb_ctrlrequest *ctrl) |
| 431 | { |
| 432 | struct usb_request *req = c->cdev->req; |
| 433 | int value = -EOPNOTSUPP; |
| 434 | u16 w_index = le16_to_cpu(ctrl->wIndex); |
| 435 | u16 w_value = le16_to_cpu(ctrl->wValue); |
| 436 | u16 w_length = le16_to_cpu(ctrl->wLength); |
| 437 | |
| 438 | /* composite driver infrastructure handles everything except |
| 439 | * the two control test requests. |
| 440 | */ |
| 441 | switch (ctrl->bRequest) { |
| 442 | |
| 443 | /* |
| 444 | * These are the same vendor-specific requests supported by |
| 445 | * Intel's USB 2.0 compliance test devices. We exceed that |
| 446 | * device spec by allowing multiple-packet requests. |
| 447 | * |
| 448 | * NOTE: the Control-OUT data stays in req->buf ... better |
| 449 | * would be copying it into a scratch buffer, so that other |
| 450 | * requests may safely intervene. |
| 451 | */ |
| 452 | case 0x5b: /* control WRITE test -- fill the buffer */ |
| 453 | if (ctrl->bRequestType != (USB_DIR_OUT|USB_TYPE_VENDOR)) |
| 454 | goto unknown; |
| 455 | if (w_value || w_index) |
| 456 | break; |
| 457 | /* just read that many bytes into the buffer */ |
| 458 | if (w_length > req->length) |
| 459 | break; |
| 460 | value = w_length; |
| 461 | break; |
| 462 | case 0x5c: /* control READ test -- return the buffer */ |
| 463 | if (ctrl->bRequestType != (USB_DIR_IN|USB_TYPE_VENDOR)) |
| 464 | goto unknown; |
| 465 | if (w_value || w_index) |
| 466 | break; |
| 467 | /* expect those bytes are still in the buffer; send back */ |
| 468 | if (w_length > req->length) |
| 469 | break; |
| 470 | value = w_length; |
| 471 | break; |
| 472 | |
| 473 | default: |
| 474 | unknown: |
| 475 | VDBG(c->cdev, |
| 476 | "unknown control req%02x.%02x v%04x i%04x l%d\n", |
| 477 | ctrl->bRequestType, ctrl->bRequest, |
| 478 | w_value, w_index, w_length); |
| 479 | } |
| 480 | |
| 481 | /* respond with data transfer or status phase? */ |
| 482 | if (value >= 0) { |
| 483 | VDBG(c->cdev, "source/sink req%02x.%02x v%04x i%04x l%d\n", |
| 484 | ctrl->bRequestType, ctrl->bRequest, |
| 485 | w_value, w_index, w_length); |
| 486 | req->zero = 0; |
| 487 | req->length = value; |
| 488 | value = usb_ep_queue(c->cdev->gadget->ep0, req, GFP_ATOMIC); |
| 489 | if (value < 0) |
| 490 | ERROR(c->cdev, "source/sinkc response, err %d\n", |
| 491 | value); |
| 492 | } |
| 493 | |
| 494 | /* device either stalls (value < 0) or reports success */ |
| 495 | return value; |
| 496 | } |
| 497 | |
| 498 | static struct usb_configuration sourcesink_driver = { |
| 499 | .label = "source/sink", |
| 500 | .strings = sourcesink_strings, |
| 501 | .bind = sourcesink_bind_config, |
| 502 | .setup = sourcesink_setup, |
| 503 | .bConfigurationValue = 3, |
| 504 | .bmAttributes = USB_CONFIG_ATT_SELFPOWER, |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 505 | /* .iConfiguration = DYNAMIC */ |
| 506 | }; |
| 507 | |
| 508 | /** |
| 509 | * sourcesink_add - add a source/sink testing configuration to a device |
| 510 | * @cdev: the device to support the configuration |
| 511 | */ |
David Brownell | ab943a2 | 2009-03-19 14:16:09 -0700 | [diff] [blame] | 512 | int __init sourcesink_add(struct usb_composite_dev *cdev, bool autoresume) |
David Brownell | a400cad | 2008-06-19 17:55:23 -0700 | [diff] [blame] | 513 | { |
| 514 | int id; |
| 515 | |
| 516 | /* allocate string ID(s) */ |
| 517 | id = usb_string_id(cdev); |
| 518 | if (id < 0) |
| 519 | return id; |
| 520 | strings_sourcesink[0].id = id; |
| 521 | |
| 522 | source_sink_intf.iInterface = id; |
| 523 | sourcesink_driver.iConfiguration = id; |
| 524 | |
| 525 | /* support autoresume for remote wakeup testing */ |
| 526 | if (autoresume) |
| 527 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; |
| 528 | |
| 529 | /* support OTG systems */ |
| 530 | if (gadget_is_otg(cdev->gadget)) { |
| 531 | sourcesink_driver.descriptors = otg_desc; |
| 532 | sourcesink_driver.bmAttributes |= USB_CONFIG_ATT_WAKEUP; |
| 533 | } |
| 534 | |
| 535 | return usb_add_config(cdev, &sourcesink_driver); |
| 536 | } |