1 /* 2 * f_dfu.c -- Device Firmware Update USB function 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com> 6 * Lukasz Majewski <l.majewski@samsung.com> 7 * 8 * Based on OpenMoko u-boot: drivers/usb/usbdfu.c 9 * (C) 2007 by OpenMoko, Inc. 10 * Author: Harald Welte <laforge@openmoko.org> 11 * 12 * based on existing SAM7DFU code from OpenPCD: 13 * (C) Copyright 2006 by Harald Welte <hwelte at hmw-consulting.de> 14 * 15 * SPDX-License-Identifier: GPL-2.0+ 16 */ 17 18 #include <errno.h> 19 #include <common.h> 20 #include <malloc.h> 21 22 #include <linux/usb/ch9.h> 23 #include <linux/usb/gadget.h> 24 #include <linux/usb/composite.h> 25 26 #include <dfu.h> 27 #include "f_dfu.h" 28 29 struct f_dfu { 30 struct usb_function usb_function; 31 32 struct usb_descriptor_header **function; 33 struct usb_string *strings; 34 35 /* when configured, we have one config */ 36 u8 config; 37 u8 altsetting; 38 enum dfu_state dfu_state; 39 unsigned int dfu_status; 40 41 /* Send/received block number is handy for data integrity check */ 42 int blk_seq_num; 43 unsigned int poll_timeout; 44 }; 45 46 typedef int (*dfu_state_fn) (struct f_dfu *, 47 const struct usb_ctrlrequest *, 48 struct usb_gadget *, 49 struct usb_request *); 50 51 static inline struct f_dfu *func_to_dfu(struct usb_function *f) 52 { 53 return container_of(f, struct f_dfu, usb_function); 54 } 55 56 static const struct dfu_function_descriptor dfu_func = { 57 .bLength = sizeof dfu_func, 58 .bDescriptorType = DFU_DT_FUNC, 59 .bmAttributes = DFU_BIT_WILL_DETACH | 60 DFU_BIT_MANIFESTATION_TOLERANT | 61 DFU_BIT_CAN_UPLOAD | 62 DFU_BIT_CAN_DNLOAD, 63 .wDetachTimeOut = 0, 64 .wTransferSize = DFU_USB_BUFSIZ, 65 .bcdDFUVersion = __constant_cpu_to_le16(0x0110), 66 }; 67 68 static struct usb_interface_descriptor dfu_intf_runtime = { 69 .bLength = sizeof dfu_intf_runtime, 70 .bDescriptorType = USB_DT_INTERFACE, 71 .bNumEndpoints = 0, 72 .bInterfaceClass = USB_CLASS_APP_SPEC, 73 .bInterfaceSubClass = 1, 74 .bInterfaceProtocol = 1, 75 /* .iInterface = DYNAMIC */ 76 }; 77 78 static struct usb_descriptor_header *dfu_runtime_descs[] = { 79 (struct usb_descriptor_header *) &dfu_intf_runtime, 80 NULL, 81 }; 82 83 static const struct usb_qualifier_descriptor dev_qualifier = { 84 .bLength = sizeof dev_qualifier, 85 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 86 .bcdUSB = __constant_cpu_to_le16(0x0200), 87 .bDeviceClass = USB_CLASS_VENDOR_SPEC, 88 .bNumConfigurations = 1, 89 }; 90 91 static const char dfu_name[] = "Device Firmware Upgrade"; 92 93 /* 94 * static strings, in UTF-8 95 * 96 * dfu_generic configuration 97 */ 98 static struct usb_string strings_dfu_generic[] = { 99 [0].s = dfu_name, 100 { } /* end of list */ 101 }; 102 103 static struct usb_gadget_strings stringtab_dfu_generic = { 104 .language = 0x0409, /* en-us */ 105 .strings = strings_dfu_generic, 106 }; 107 108 static struct usb_gadget_strings *dfu_generic_strings[] = { 109 &stringtab_dfu_generic, 110 NULL, 111 }; 112 113 /* 114 * usb_function specific 115 */ 116 static struct usb_gadget_strings stringtab_dfu = { 117 .language = 0x0409, /* en-us */ 118 /* 119 * .strings 120 * 121 * assigned during initialization, 122 * depends on number of flash entities 123 * 124 */ 125 }; 126 127 static struct usb_gadget_strings *dfu_strings[] = { 128 &stringtab_dfu, 129 NULL, 130 }; 131 132 static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms) 133 { 134 /* 135 * The bwPollTimeout DFU_GETSTATUS request payload provides information 136 * about minimum time, in milliseconds, that the host should wait before 137 * sending a subsequent DFU_GETSTATUS request 138 * 139 * This permits the device to vary the delay depending on its need to 140 * erase or program the memory 141 * 142 */ 143 144 unsigned char *p = (unsigned char *)&ms; 145 146 if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) { 147 dstat->bwPollTimeout[0] = 0; 148 dstat->bwPollTimeout[1] = 0; 149 dstat->bwPollTimeout[2] = 0; 150 151 return; 152 } 153 154 dstat->bwPollTimeout[0] = *p++; 155 dstat->bwPollTimeout[1] = *p++; 156 dstat->bwPollTimeout[2] = *p; 157 } 158 159 /*-------------------------------------------------------------------------*/ 160 161 static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req) 162 { 163 struct f_dfu *f_dfu = req->context; 164 165 dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf, 166 req->length, f_dfu->blk_seq_num); 167 168 if (req->length == 0) 169 puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n"); 170 } 171 172 static void handle_getstatus(struct usb_request *req) 173 { 174 struct dfu_status *dstat = (struct dfu_status *)req->buf; 175 struct f_dfu *f_dfu = req->context; 176 177 switch (f_dfu->dfu_state) { 178 case DFU_STATE_dfuDNLOAD_SYNC: 179 case DFU_STATE_dfuDNBUSY: 180 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE; 181 break; 182 case DFU_STATE_dfuMANIFEST_SYNC: 183 break; 184 default: 185 break; 186 } 187 188 dfu_set_poll_timeout(dstat, 0); 189 190 if (f_dfu->poll_timeout) 191 if (!(f_dfu->blk_seq_num % 192 (dfu_get_buf_size() / DFU_USB_BUFSIZ))) 193 dfu_set_poll_timeout(dstat, f_dfu->poll_timeout); 194 195 /* send status response */ 196 dstat->bStatus = f_dfu->dfu_status; 197 dstat->bState = f_dfu->dfu_state; 198 dstat->iString = 0; 199 } 200 201 static void handle_getstate(struct usb_request *req) 202 { 203 struct f_dfu *f_dfu = req->context; 204 205 ((u8 *)req->buf)[0] = f_dfu->dfu_state; 206 req->actual = sizeof(u8); 207 } 208 209 static inline void to_dfu_mode(struct f_dfu *f_dfu) 210 { 211 f_dfu->usb_function.strings = dfu_strings; 212 f_dfu->usb_function.hs_descriptors = f_dfu->function; 213 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 214 } 215 216 static inline void to_runtime_mode(struct f_dfu *f_dfu) 217 { 218 f_dfu->usb_function.strings = NULL; 219 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 220 } 221 222 static int handle_upload(struct usb_request *req, u16 len) 223 { 224 struct f_dfu *f_dfu = req->context; 225 226 return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf, 227 req->length, f_dfu->blk_seq_num); 228 } 229 230 static int handle_dnload(struct usb_gadget *gadget, u16 len) 231 { 232 struct usb_composite_dev *cdev = get_gadget_data(gadget); 233 struct usb_request *req = cdev->req; 234 struct f_dfu *f_dfu = req->context; 235 236 if (len == 0) 237 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC; 238 239 req->complete = dnload_request_complete; 240 241 return len; 242 } 243 244 /*-------------------------------------------------------------------------*/ 245 /* DFU state machine */ 246 static int state_app_idle(struct f_dfu *f_dfu, 247 const struct usb_ctrlrequest *ctrl, 248 struct usb_gadget *gadget, 249 struct usb_request *req) 250 { 251 int value = 0; 252 253 switch (ctrl->bRequest) { 254 case USB_REQ_DFU_GETSTATUS: 255 handle_getstatus(req); 256 value = RET_STAT_LEN; 257 break; 258 case USB_REQ_DFU_GETSTATE: 259 handle_getstate(req); 260 break; 261 case USB_REQ_DFU_DETACH: 262 f_dfu->dfu_state = DFU_STATE_appDETACH; 263 to_dfu_mode(f_dfu); 264 value = RET_ZLP; 265 break; 266 default: 267 value = RET_STALL; 268 break; 269 } 270 271 return value; 272 } 273 274 static int state_app_detach(struct f_dfu *f_dfu, 275 const struct usb_ctrlrequest *ctrl, 276 struct usb_gadget *gadget, 277 struct usb_request *req) 278 { 279 int value = 0; 280 281 switch (ctrl->bRequest) { 282 case USB_REQ_DFU_GETSTATUS: 283 handle_getstatus(req); 284 value = RET_STAT_LEN; 285 break; 286 case USB_REQ_DFU_GETSTATE: 287 handle_getstate(req); 288 break; 289 default: 290 f_dfu->dfu_state = DFU_STATE_appIDLE; 291 value = RET_STALL; 292 break; 293 } 294 295 return value; 296 } 297 298 static int state_dfu_idle(struct f_dfu *f_dfu, 299 const struct usb_ctrlrequest *ctrl, 300 struct usb_gadget *gadget, 301 struct usb_request *req) 302 { 303 u16 w_value = le16_to_cpu(ctrl->wValue); 304 u16 len = le16_to_cpu(ctrl->wLength); 305 int value = 0; 306 307 switch (ctrl->bRequest) { 308 case USB_REQ_DFU_DNLOAD: 309 if (len == 0) { 310 f_dfu->dfu_state = DFU_STATE_dfuERROR; 311 value = RET_STALL; 312 break; 313 } 314 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 315 f_dfu->blk_seq_num = w_value; 316 value = handle_dnload(gadget, len); 317 break; 318 case USB_REQ_DFU_UPLOAD: 319 f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE; 320 f_dfu->blk_seq_num = 0; 321 value = handle_upload(req, len); 322 break; 323 case USB_REQ_DFU_ABORT: 324 /* no zlp? */ 325 value = RET_ZLP; 326 break; 327 case USB_REQ_DFU_GETSTATUS: 328 handle_getstatus(req); 329 value = RET_STAT_LEN; 330 break; 331 case USB_REQ_DFU_GETSTATE: 332 handle_getstate(req); 333 break; 334 case USB_REQ_DFU_DETACH: 335 /* 336 * Proprietary extension: 'detach' from idle mode and 337 * get back to runtime mode in case of USB Reset. As 338 * much as I dislike this, we just can't use every USB 339 * bus reset to switch back to runtime mode, since at 340 * least the Linux USB stack likes to send a number of 341 * resets in a row :( 342 */ 343 f_dfu->dfu_state = 344 DFU_STATE_dfuMANIFEST_WAIT_RST; 345 to_runtime_mode(f_dfu); 346 f_dfu->dfu_state = DFU_STATE_appIDLE; 347 348 dfu_trigger_reset(); 349 break; 350 default: 351 f_dfu->dfu_state = DFU_STATE_dfuERROR; 352 value = RET_STALL; 353 break; 354 } 355 356 return value; 357 } 358 359 static int state_dfu_dnload_sync(struct f_dfu *f_dfu, 360 const struct usb_ctrlrequest *ctrl, 361 struct usb_gadget *gadget, 362 struct usb_request *req) 363 { 364 int value = 0; 365 366 switch (ctrl->bRequest) { 367 case USB_REQ_DFU_GETSTATUS: 368 handle_getstatus(req); 369 value = RET_STAT_LEN; 370 break; 371 case USB_REQ_DFU_GETSTATE: 372 handle_getstate(req); 373 break; 374 default: 375 f_dfu->dfu_state = DFU_STATE_dfuERROR; 376 value = RET_STALL; 377 break; 378 } 379 380 return value; 381 } 382 383 static int state_dfu_dnbusy(struct f_dfu *f_dfu, 384 const struct usb_ctrlrequest *ctrl, 385 struct usb_gadget *gadget, 386 struct usb_request *req) 387 { 388 int value = 0; 389 390 switch (ctrl->bRequest) { 391 case USB_REQ_DFU_GETSTATUS: 392 handle_getstatus(req); 393 value = RET_STAT_LEN; 394 break; 395 default: 396 f_dfu->dfu_state = DFU_STATE_dfuERROR; 397 value = RET_STALL; 398 break; 399 } 400 401 return value; 402 } 403 404 static int state_dfu_dnload_idle(struct f_dfu *f_dfu, 405 const struct usb_ctrlrequest *ctrl, 406 struct usb_gadget *gadget, 407 struct usb_request *req) 408 { 409 u16 w_value = le16_to_cpu(ctrl->wValue); 410 u16 len = le16_to_cpu(ctrl->wLength); 411 int value = 0; 412 413 switch (ctrl->bRequest) { 414 case USB_REQ_DFU_DNLOAD: 415 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 416 f_dfu->blk_seq_num = w_value; 417 value = handle_dnload(gadget, len); 418 break; 419 case USB_REQ_DFU_ABORT: 420 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 421 value = RET_ZLP; 422 break; 423 case USB_REQ_DFU_GETSTATUS: 424 handle_getstatus(req); 425 value = RET_STAT_LEN; 426 break; 427 case USB_REQ_DFU_GETSTATE: 428 handle_getstate(req); 429 break; 430 default: 431 f_dfu->dfu_state = DFU_STATE_dfuERROR; 432 value = RET_STALL; 433 break; 434 } 435 436 return value; 437 } 438 439 static int state_dfu_manifest_sync(struct f_dfu *f_dfu, 440 const struct usb_ctrlrequest *ctrl, 441 struct usb_gadget *gadget, 442 struct usb_request *req) 443 { 444 int value = 0; 445 446 switch (ctrl->bRequest) { 447 case USB_REQ_DFU_GETSTATUS: 448 /* We're MainfestationTolerant */ 449 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 450 handle_getstatus(req); 451 f_dfu->blk_seq_num = 0; 452 value = RET_STAT_LEN; 453 break; 454 case USB_REQ_DFU_GETSTATE: 455 handle_getstate(req); 456 break; 457 default: 458 f_dfu->dfu_state = DFU_STATE_dfuERROR; 459 value = RET_STALL; 460 break; 461 } 462 463 return value; 464 } 465 466 static int state_dfu_upload_idle(struct f_dfu *f_dfu, 467 const struct usb_ctrlrequest *ctrl, 468 struct usb_gadget *gadget, 469 struct usb_request *req) 470 { 471 u16 w_value = le16_to_cpu(ctrl->wValue); 472 u16 len = le16_to_cpu(ctrl->wLength); 473 int value = 0; 474 475 switch (ctrl->bRequest) { 476 case USB_REQ_DFU_UPLOAD: 477 /* state transition if less data then requested */ 478 f_dfu->blk_seq_num = w_value; 479 value = handle_upload(req, len); 480 if (value >= 0 && value < len) 481 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 482 break; 483 case USB_REQ_DFU_ABORT: 484 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 485 /* no zlp? */ 486 value = RET_ZLP; 487 break; 488 case USB_REQ_DFU_GETSTATUS: 489 handle_getstatus(req); 490 value = RET_STAT_LEN; 491 break; 492 case USB_REQ_DFU_GETSTATE: 493 handle_getstate(req); 494 break; 495 default: 496 f_dfu->dfu_state = DFU_STATE_dfuERROR; 497 value = RET_STALL; 498 break; 499 } 500 501 return value; 502 } 503 504 static int state_dfu_error(struct f_dfu *f_dfu, 505 const struct usb_ctrlrequest *ctrl, 506 struct usb_gadget *gadget, 507 struct usb_request *req) 508 { 509 int value = 0; 510 511 switch (ctrl->bRequest) { 512 case USB_REQ_DFU_GETSTATUS: 513 handle_getstatus(req); 514 value = RET_STAT_LEN; 515 break; 516 case USB_REQ_DFU_GETSTATE: 517 handle_getstate(req); 518 break; 519 case USB_REQ_DFU_CLRSTATUS: 520 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 521 f_dfu->dfu_status = DFU_STATUS_OK; 522 /* no zlp? */ 523 value = RET_ZLP; 524 break; 525 default: 526 f_dfu->dfu_state = DFU_STATE_dfuERROR; 527 value = RET_STALL; 528 break; 529 } 530 531 return value; 532 } 533 534 static dfu_state_fn dfu_state[] = { 535 state_app_idle, /* DFU_STATE_appIDLE */ 536 state_app_detach, /* DFU_STATE_appDETACH */ 537 state_dfu_idle, /* DFU_STATE_dfuIDLE */ 538 state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */ 539 state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */ 540 state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */ 541 state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */ 542 NULL, /* DFU_STATE_dfuMANIFEST */ 543 NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */ 544 state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */ 545 state_dfu_error /* DFU_STATE_dfuERROR */ 546 }; 547 548 static int 549 dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 550 { 551 struct usb_gadget *gadget = f->config->cdev->gadget; 552 struct usb_request *req = f->config->cdev->req; 553 struct f_dfu *f_dfu = f->config->cdev->req->context; 554 u16 len = le16_to_cpu(ctrl->wLength); 555 u16 w_value = le16_to_cpu(ctrl->wValue); 556 int value = 0; 557 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 558 559 debug("w_value: 0x%x len: 0x%x\n", w_value, len); 560 debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n", 561 req_type, ctrl->bRequest, f_dfu->dfu_state); 562 563 if (req_type == USB_TYPE_STANDARD) { 564 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR && 565 (w_value >> 8) == DFU_DT_FUNC) { 566 value = min(len, (u16) sizeof(dfu_func)); 567 memcpy(req->buf, &dfu_func, value); 568 } 569 } else /* DFU specific request */ 570 value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req); 571 572 if (value >= 0) { 573 req->length = value; 574 req->zero = value < len; 575 value = usb_ep_queue(gadget->ep0, req, 0); 576 if (value < 0) { 577 debug("ep_queue --> %d\n", value); 578 req->status = 0; 579 } 580 } 581 582 return value; 583 } 584 585 /*-------------------------------------------------------------------------*/ 586 587 static int 588 dfu_prepare_strings(struct f_dfu *f_dfu, int n) 589 { 590 struct dfu_entity *de = NULL; 591 int i = 0; 592 593 f_dfu->strings = calloc(sizeof(struct usb_string), n + 1); 594 if (!f_dfu->strings) 595 goto enomem; 596 597 for (i = 0; i < n; ++i) { 598 de = dfu_get_entity(i); 599 f_dfu->strings[i].s = de->name; 600 } 601 602 f_dfu->strings[i].id = 0; 603 f_dfu->strings[i].s = NULL; 604 605 return 0; 606 607 enomem: 608 while (i) 609 f_dfu->strings[--i].s = NULL; 610 611 free(f_dfu->strings); 612 613 return -ENOMEM; 614 } 615 616 static int dfu_prepare_function(struct f_dfu *f_dfu, int n) 617 { 618 struct usb_interface_descriptor *d; 619 int i = 0; 620 621 f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 1); 622 if (!f_dfu->function) 623 goto enomem; 624 625 for (i = 0; i < n; ++i) { 626 d = calloc(sizeof(*d), 1); 627 if (!d) 628 goto enomem; 629 630 d->bLength = sizeof(*d); 631 d->bDescriptorType = USB_DT_INTERFACE; 632 d->bAlternateSetting = i; 633 d->bNumEndpoints = 0; 634 d->bInterfaceClass = USB_CLASS_APP_SPEC; 635 d->bInterfaceSubClass = 1; 636 d->bInterfaceProtocol = 2; 637 638 f_dfu->function[i] = (struct usb_descriptor_header *)d; 639 } 640 f_dfu->function[i] = NULL; 641 642 return 0; 643 644 enomem: 645 while (i) { 646 free(f_dfu->function[--i]); 647 f_dfu->function[i] = NULL; 648 } 649 free(f_dfu->function); 650 651 return -ENOMEM; 652 } 653 654 static int dfu_bind(struct usb_configuration *c, struct usb_function *f) 655 { 656 struct usb_composite_dev *cdev = c->cdev; 657 struct f_dfu *f_dfu = func_to_dfu(f); 658 int alt_num = dfu_get_alt_number(); 659 int rv, id, i; 660 661 id = usb_interface_id(c, f); 662 if (id < 0) 663 return id; 664 dfu_intf_runtime.bInterfaceNumber = id; 665 666 f_dfu->dfu_state = DFU_STATE_appIDLE; 667 f_dfu->dfu_status = DFU_STATUS_OK; 668 669 rv = dfu_prepare_function(f_dfu, alt_num); 670 if (rv) 671 goto error; 672 673 rv = dfu_prepare_strings(f_dfu, alt_num); 674 if (rv) 675 goto error; 676 for (i = 0; i < alt_num; i++) { 677 id = usb_string_id(cdev); 678 if (id < 0) 679 return id; 680 f_dfu->strings[i].id = id; 681 ((struct usb_interface_descriptor *)f_dfu->function[i]) 682 ->iInterface = id; 683 } 684 685 to_dfu_mode(f_dfu); 686 687 stringtab_dfu.strings = f_dfu->strings; 688 689 cdev->req->context = f_dfu; 690 691 error: 692 return rv; 693 } 694 695 static void dfu_unbind(struct usb_configuration *c, struct usb_function *f) 696 { 697 struct f_dfu *f_dfu = func_to_dfu(f); 698 int alt_num = dfu_get_alt_number(); 699 int i; 700 701 if (f_dfu->strings) { 702 i = alt_num; 703 while (i) 704 f_dfu->strings[--i].s = NULL; 705 706 free(f_dfu->strings); 707 } 708 709 if (f_dfu->function) { 710 i = alt_num; 711 while (i) { 712 free(f_dfu->function[--i]); 713 f_dfu->function[i] = NULL; 714 } 715 free(f_dfu->function); 716 } 717 718 free(f_dfu); 719 } 720 721 static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 722 { 723 struct f_dfu *f_dfu = func_to_dfu(f); 724 725 debug("%s: intf:%d alt:%d\n", __func__, intf, alt); 726 727 f_dfu->altsetting = alt; 728 729 return 0; 730 } 731 732 /* TODO: is this really what we need here? */ 733 static void dfu_disable(struct usb_function *f) 734 { 735 struct f_dfu *f_dfu = func_to_dfu(f); 736 if (f_dfu->config == 0) 737 return; 738 739 debug("%s: reset config\n", __func__); 740 741 f_dfu->config = 0; 742 } 743 744 static int dfu_bind_config(struct usb_configuration *c) 745 { 746 struct f_dfu *f_dfu; 747 int status; 748 749 f_dfu = calloc(sizeof(*f_dfu), 1); 750 if (!f_dfu) 751 return -ENOMEM; 752 f_dfu->usb_function.name = "dfu"; 753 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 754 f_dfu->usb_function.bind = dfu_bind; 755 f_dfu->usb_function.unbind = dfu_unbind; 756 f_dfu->usb_function.set_alt = dfu_set_alt; 757 f_dfu->usb_function.disable = dfu_disable; 758 f_dfu->usb_function.strings = dfu_generic_strings; 759 f_dfu->usb_function.setup = dfu_handle; 760 f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT; 761 762 status = usb_add_function(c, &f_dfu->usb_function); 763 if (status) 764 free(f_dfu); 765 766 return status; 767 } 768 769 int dfu_add(struct usb_configuration *c) 770 { 771 int id; 772 773 id = usb_string_id(c->cdev); 774 if (id < 0) 775 return id; 776 strings_dfu_generic[0].id = id; 777 dfu_intf_runtime.iInterface = id; 778 779 debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__, 780 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 781 782 return dfu_bind_config(c); 783 } 784