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 <g_dnl.h> 28 #include "f_dfu.h" 29 30 struct f_dfu { 31 struct usb_function usb_function; 32 33 struct usb_descriptor_header **function; 34 struct usb_string *strings; 35 36 /* when configured, we have one config */ 37 u8 config; 38 u8 altsetting; 39 enum dfu_state dfu_state; 40 unsigned int dfu_status; 41 42 /* Send/received block number is handy for data integrity check */ 43 int blk_seq_num; 44 unsigned int poll_timeout; 45 }; 46 47 struct dfu_entity *dfu_defer_flush; 48 49 typedef int (*dfu_state_fn) (struct f_dfu *, 50 const struct usb_ctrlrequest *, 51 struct usb_gadget *, 52 struct usb_request *); 53 54 static inline struct f_dfu *func_to_dfu(struct usb_function *f) 55 { 56 return container_of(f, struct f_dfu, usb_function); 57 } 58 59 static const struct dfu_function_descriptor dfu_func = { 60 .bLength = sizeof dfu_func, 61 .bDescriptorType = DFU_DT_FUNC, 62 .bmAttributes = DFU_BIT_WILL_DETACH | 63 DFU_BIT_MANIFESTATION_TOLERANT | 64 DFU_BIT_CAN_UPLOAD | 65 DFU_BIT_CAN_DNLOAD, 66 .wDetachTimeOut = 0, 67 .wTransferSize = DFU_USB_BUFSIZ, 68 .bcdDFUVersion = __constant_cpu_to_le16(0x0110), 69 }; 70 71 static struct usb_interface_descriptor dfu_intf_runtime = { 72 .bLength = sizeof dfu_intf_runtime, 73 .bDescriptorType = USB_DT_INTERFACE, 74 .bNumEndpoints = 0, 75 .bInterfaceClass = USB_CLASS_APP_SPEC, 76 .bInterfaceSubClass = 1, 77 .bInterfaceProtocol = 1, 78 /* .iInterface = DYNAMIC */ 79 }; 80 81 static struct usb_descriptor_header *dfu_runtime_descs[] = { 82 (struct usb_descriptor_header *) &dfu_intf_runtime, 83 NULL, 84 }; 85 86 static const char dfu_name[] = "Device Firmware Upgrade"; 87 88 /* 89 * static strings, in UTF-8 90 * 91 * dfu_generic configuration 92 */ 93 static struct usb_string strings_dfu_generic[] = { 94 [0].s = dfu_name, 95 { } /* end of list */ 96 }; 97 98 static struct usb_gadget_strings stringtab_dfu_generic = { 99 .language = 0x0409, /* en-us */ 100 .strings = strings_dfu_generic, 101 }; 102 103 static struct usb_gadget_strings *dfu_generic_strings[] = { 104 &stringtab_dfu_generic, 105 NULL, 106 }; 107 108 /* 109 * usb_function specific 110 */ 111 static struct usb_gadget_strings stringtab_dfu = { 112 .language = 0x0409, /* en-us */ 113 /* 114 * .strings 115 * 116 * assigned during initialization, 117 * depends on number of flash entities 118 * 119 */ 120 }; 121 122 static struct usb_gadget_strings *dfu_strings[] = { 123 &stringtab_dfu, 124 NULL, 125 }; 126 127 static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms) 128 { 129 /* 130 * The bwPollTimeout DFU_GETSTATUS request payload provides information 131 * about minimum time, in milliseconds, that the host should wait before 132 * sending a subsequent DFU_GETSTATUS request 133 * 134 * This permits the device to vary the delay depending on its need to 135 * erase or program the memory 136 * 137 */ 138 139 unsigned char *p = (unsigned char *)&ms; 140 141 if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) { 142 dstat->bwPollTimeout[0] = 0; 143 dstat->bwPollTimeout[1] = 0; 144 dstat->bwPollTimeout[2] = 0; 145 146 return; 147 } 148 149 dstat->bwPollTimeout[0] = *p++; 150 dstat->bwPollTimeout[1] = *p++; 151 dstat->bwPollTimeout[2] = *p; 152 } 153 154 /*-------------------------------------------------------------------------*/ 155 156 static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req) 157 { 158 struct f_dfu *f_dfu = req->context; 159 int ret; 160 161 ret = dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf, 162 req->actual, f_dfu->blk_seq_num); 163 if (ret) { 164 f_dfu->dfu_status = DFU_STATUS_errUNKNOWN; 165 f_dfu->dfu_state = DFU_STATE_dfuERROR; 166 } 167 } 168 169 static void dnload_request_flush(struct usb_ep *ep, struct usb_request *req) 170 { 171 struct f_dfu *f_dfu = req->context; 172 dfu_set_defer_flush(dfu_get_entity(f_dfu->altsetting)); 173 } 174 175 static inline int dfu_get_manifest_timeout(struct dfu_entity *dfu) 176 { 177 return dfu->poll_timeout ? dfu->poll_timeout(dfu) : 178 DFU_MANIFEST_POLL_TIMEOUT; 179 } 180 181 static int handle_getstatus(struct usb_request *req) 182 { 183 struct dfu_status *dstat = (struct dfu_status *)req->buf; 184 struct f_dfu *f_dfu = req->context; 185 struct dfu_entity *dfu = dfu_get_entity(f_dfu->altsetting); 186 187 dfu_set_poll_timeout(dstat, 0); 188 189 switch (f_dfu->dfu_state) { 190 case DFU_STATE_dfuDNLOAD_SYNC: 191 case DFU_STATE_dfuDNBUSY: 192 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE; 193 break; 194 case DFU_STATE_dfuMANIFEST_SYNC: 195 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 196 break; 197 case DFU_STATE_dfuMANIFEST: 198 dfu_set_poll_timeout(dstat, dfu_get_manifest_timeout(dfu)); 199 break; 200 default: 201 break; 202 } 203 204 if (f_dfu->poll_timeout) 205 if (!(f_dfu->blk_seq_num % 206 (dfu_get_buf_size() / DFU_USB_BUFSIZ))) 207 dfu_set_poll_timeout(dstat, f_dfu->poll_timeout); 208 209 /* send status response */ 210 dstat->bStatus = f_dfu->dfu_status; 211 dstat->bState = f_dfu->dfu_state; 212 dstat->iString = 0; 213 214 return sizeof(struct dfu_status); 215 } 216 217 static int handle_getstate(struct usb_request *req) 218 { 219 struct f_dfu *f_dfu = req->context; 220 221 ((u8 *)req->buf)[0] = f_dfu->dfu_state; 222 return sizeof(u8); 223 } 224 225 static inline void to_dfu_mode(struct f_dfu *f_dfu) 226 { 227 f_dfu->usb_function.strings = dfu_strings; 228 f_dfu->usb_function.hs_descriptors = f_dfu->function; 229 f_dfu->usb_function.descriptors = f_dfu->function; 230 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 231 } 232 233 static inline void to_runtime_mode(struct f_dfu *f_dfu) 234 { 235 f_dfu->usb_function.strings = NULL; 236 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 237 f_dfu->usb_function.descriptors = dfu_runtime_descs; 238 } 239 240 static int handle_upload(struct usb_request *req, u16 len) 241 { 242 struct f_dfu *f_dfu = req->context; 243 244 return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf, 245 req->length, f_dfu->blk_seq_num); 246 } 247 248 static int handle_dnload(struct usb_gadget *gadget, u16 len) 249 { 250 struct usb_composite_dev *cdev = get_gadget_data(gadget); 251 struct usb_request *req = cdev->req; 252 struct f_dfu *f_dfu = req->context; 253 254 if (len == 0) 255 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC; 256 257 req->complete = dnload_request_complete; 258 259 return len; 260 } 261 262 /*-------------------------------------------------------------------------*/ 263 /* DFU state machine */ 264 static int state_app_idle(struct f_dfu *f_dfu, 265 const struct usb_ctrlrequest *ctrl, 266 struct usb_gadget *gadget, 267 struct usb_request *req) 268 { 269 int value = 0; 270 271 switch (ctrl->bRequest) { 272 case USB_REQ_DFU_GETSTATUS: 273 value = handle_getstatus(req); 274 break; 275 case USB_REQ_DFU_GETSTATE: 276 value = handle_getstate(req); 277 break; 278 case USB_REQ_DFU_DETACH: 279 f_dfu->dfu_state = DFU_STATE_appDETACH; 280 to_dfu_mode(f_dfu); 281 value = RET_ZLP; 282 break; 283 default: 284 value = RET_STALL; 285 break; 286 } 287 288 return value; 289 } 290 291 static int state_app_detach(struct f_dfu *f_dfu, 292 const struct usb_ctrlrequest *ctrl, 293 struct usb_gadget *gadget, 294 struct usb_request *req) 295 { 296 int value = 0; 297 298 switch (ctrl->bRequest) { 299 case USB_REQ_DFU_GETSTATUS: 300 value = handle_getstatus(req); 301 break; 302 case USB_REQ_DFU_GETSTATE: 303 value = handle_getstate(req); 304 break; 305 default: 306 f_dfu->dfu_state = DFU_STATE_appIDLE; 307 value = RET_STALL; 308 break; 309 } 310 311 return value; 312 } 313 314 static int state_dfu_idle(struct f_dfu *f_dfu, 315 const struct usb_ctrlrequest *ctrl, 316 struct usb_gadget *gadget, 317 struct usb_request *req) 318 { 319 u16 w_value = le16_to_cpu(ctrl->wValue); 320 u16 len = le16_to_cpu(ctrl->wLength); 321 int value = 0; 322 323 switch (ctrl->bRequest) { 324 case USB_REQ_DFU_DNLOAD: 325 if (len == 0) { 326 f_dfu->dfu_state = DFU_STATE_dfuERROR; 327 value = RET_STALL; 328 break; 329 } 330 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 331 f_dfu->blk_seq_num = w_value; 332 value = handle_dnload(gadget, len); 333 break; 334 case USB_REQ_DFU_UPLOAD: 335 f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE; 336 f_dfu->blk_seq_num = 0; 337 value = handle_upload(req, len); 338 break; 339 case USB_REQ_DFU_ABORT: 340 /* no zlp? */ 341 value = RET_ZLP; 342 break; 343 case USB_REQ_DFU_GETSTATUS: 344 value = handle_getstatus(req); 345 break; 346 case USB_REQ_DFU_GETSTATE: 347 value = handle_getstate(req); 348 break; 349 case USB_REQ_DFU_DETACH: 350 /* 351 * Proprietary extension: 'detach' from idle mode and 352 * get back to runtime mode in case of USB Reset. As 353 * much as I dislike this, we just can't use every USB 354 * bus reset to switch back to runtime mode, since at 355 * least the Linux USB stack likes to send a number of 356 * resets in a row :( 357 */ 358 f_dfu->dfu_state = 359 DFU_STATE_dfuMANIFEST_WAIT_RST; 360 to_runtime_mode(f_dfu); 361 f_dfu->dfu_state = DFU_STATE_appIDLE; 362 363 g_dnl_trigger_detach(); 364 break; 365 default: 366 f_dfu->dfu_state = DFU_STATE_dfuERROR; 367 value = RET_STALL; 368 break; 369 } 370 371 return value; 372 } 373 374 static int state_dfu_dnload_sync(struct f_dfu *f_dfu, 375 const struct usb_ctrlrequest *ctrl, 376 struct usb_gadget *gadget, 377 struct usb_request *req) 378 { 379 int value = 0; 380 381 switch (ctrl->bRequest) { 382 case USB_REQ_DFU_GETSTATUS: 383 value = handle_getstatus(req); 384 break; 385 case USB_REQ_DFU_GETSTATE: 386 value = handle_getstate(req); 387 break; 388 default: 389 f_dfu->dfu_state = DFU_STATE_dfuERROR; 390 value = RET_STALL; 391 break; 392 } 393 394 return value; 395 } 396 397 static int state_dfu_dnbusy(struct f_dfu *f_dfu, 398 const struct usb_ctrlrequest *ctrl, 399 struct usb_gadget *gadget, 400 struct usb_request *req) 401 { 402 int value = 0; 403 404 switch (ctrl->bRequest) { 405 case USB_REQ_DFU_GETSTATUS: 406 value = handle_getstatus(req); 407 break; 408 default: 409 f_dfu->dfu_state = DFU_STATE_dfuERROR; 410 value = RET_STALL; 411 break; 412 } 413 414 return value; 415 } 416 417 static int state_dfu_dnload_idle(struct f_dfu *f_dfu, 418 const struct usb_ctrlrequest *ctrl, 419 struct usb_gadget *gadget, 420 struct usb_request *req) 421 { 422 u16 w_value = le16_to_cpu(ctrl->wValue); 423 u16 len = le16_to_cpu(ctrl->wLength); 424 int value = 0; 425 426 switch (ctrl->bRequest) { 427 case USB_REQ_DFU_DNLOAD: 428 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 429 f_dfu->blk_seq_num = w_value; 430 value = handle_dnload(gadget, len); 431 break; 432 case USB_REQ_DFU_ABORT: 433 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 434 value = RET_ZLP; 435 break; 436 case USB_REQ_DFU_GETSTATUS: 437 value = handle_getstatus(req); 438 break; 439 case USB_REQ_DFU_GETSTATE: 440 value = handle_getstate(req); 441 break; 442 default: 443 f_dfu->dfu_state = DFU_STATE_dfuERROR; 444 value = RET_STALL; 445 break; 446 } 447 448 return value; 449 } 450 451 static int state_dfu_manifest_sync(struct f_dfu *f_dfu, 452 const struct usb_ctrlrequest *ctrl, 453 struct usb_gadget *gadget, 454 struct usb_request *req) 455 { 456 int value = 0; 457 458 switch (ctrl->bRequest) { 459 case USB_REQ_DFU_GETSTATUS: 460 /* We're MainfestationTolerant */ 461 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 462 value = handle_getstatus(req); 463 f_dfu->blk_seq_num = 0; 464 req->complete = dnload_request_flush; 465 break; 466 case USB_REQ_DFU_GETSTATE: 467 value = handle_getstate(req); 468 break; 469 default: 470 f_dfu->dfu_state = DFU_STATE_dfuERROR; 471 value = RET_STALL; 472 break; 473 } 474 475 return value; 476 } 477 478 static int state_dfu_manifest(struct f_dfu *f_dfu, 479 const struct usb_ctrlrequest *ctrl, 480 struct usb_gadget *gadget, 481 struct usb_request *req) 482 { 483 int value = 0; 484 485 switch (ctrl->bRequest) { 486 case USB_REQ_DFU_GETSTATUS: 487 /* We're MainfestationTolerant */ 488 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 489 value = handle_getstatus(req); 490 f_dfu->blk_seq_num = 0; 491 puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n"); 492 break; 493 case USB_REQ_DFU_GETSTATE: 494 value = handle_getstate(req); 495 break; 496 default: 497 f_dfu->dfu_state = DFU_STATE_dfuERROR; 498 value = RET_STALL; 499 break; 500 } 501 return value; 502 } 503 504 static int state_dfu_upload_idle(struct f_dfu *f_dfu, 505 const struct usb_ctrlrequest *ctrl, 506 struct usb_gadget *gadget, 507 struct usb_request *req) 508 { 509 u16 w_value = le16_to_cpu(ctrl->wValue); 510 u16 len = le16_to_cpu(ctrl->wLength); 511 int value = 0; 512 513 switch (ctrl->bRequest) { 514 case USB_REQ_DFU_UPLOAD: 515 /* state transition if less data then requested */ 516 f_dfu->blk_seq_num = w_value; 517 value = handle_upload(req, len); 518 if (value >= 0 && value < len) 519 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 520 break; 521 case USB_REQ_DFU_ABORT: 522 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 523 /* no zlp? */ 524 value = RET_ZLP; 525 break; 526 case USB_REQ_DFU_GETSTATUS: 527 value = handle_getstatus(req); 528 break; 529 case USB_REQ_DFU_GETSTATE: 530 value = handle_getstate(req); 531 break; 532 default: 533 f_dfu->dfu_state = DFU_STATE_dfuERROR; 534 value = RET_STALL; 535 break; 536 } 537 538 return value; 539 } 540 541 static int state_dfu_error(struct f_dfu *f_dfu, 542 const struct usb_ctrlrequest *ctrl, 543 struct usb_gadget *gadget, 544 struct usb_request *req) 545 { 546 int value = 0; 547 548 switch (ctrl->bRequest) { 549 case USB_REQ_DFU_GETSTATUS: 550 value = handle_getstatus(req); 551 break; 552 case USB_REQ_DFU_GETSTATE: 553 value = handle_getstate(req); 554 break; 555 case USB_REQ_DFU_CLRSTATUS: 556 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 557 f_dfu->dfu_status = DFU_STATUS_OK; 558 /* no zlp? */ 559 value = RET_ZLP; 560 break; 561 default: 562 f_dfu->dfu_state = DFU_STATE_dfuERROR; 563 value = RET_STALL; 564 break; 565 } 566 567 return value; 568 } 569 570 static dfu_state_fn dfu_state[] = { 571 state_app_idle, /* DFU_STATE_appIDLE */ 572 state_app_detach, /* DFU_STATE_appDETACH */ 573 state_dfu_idle, /* DFU_STATE_dfuIDLE */ 574 state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */ 575 state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */ 576 state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */ 577 state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */ 578 state_dfu_manifest, /* DFU_STATE_dfuMANIFEST */ 579 NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */ 580 state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */ 581 state_dfu_error /* DFU_STATE_dfuERROR */ 582 }; 583 584 static int 585 dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 586 { 587 struct usb_gadget *gadget = f->config->cdev->gadget; 588 struct usb_request *req = f->config->cdev->req; 589 struct f_dfu *f_dfu = f->config->cdev->req->context; 590 u16 len = le16_to_cpu(ctrl->wLength); 591 u16 w_value = le16_to_cpu(ctrl->wValue); 592 int value = 0; 593 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 594 595 debug("w_value: 0x%x len: 0x%x\n", w_value, len); 596 debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n", 597 req_type, ctrl->bRequest, f_dfu->dfu_state); 598 599 if (req_type == USB_TYPE_STANDARD) { 600 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR && 601 (w_value >> 8) == DFU_DT_FUNC) { 602 value = min(len, (u16) sizeof(dfu_func)); 603 memcpy(req->buf, &dfu_func, value); 604 } 605 } else /* DFU specific request */ 606 value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req); 607 608 if (value >= 0) { 609 req->length = value; 610 req->zero = value < len; 611 value = usb_ep_queue(gadget->ep0, req, 0); 612 if (value < 0) { 613 debug("ep_queue --> %d\n", value); 614 req->status = 0; 615 } 616 } 617 618 return value; 619 } 620 621 /*-------------------------------------------------------------------------*/ 622 623 static int 624 dfu_prepare_strings(struct f_dfu *f_dfu, int n) 625 { 626 struct dfu_entity *de = NULL; 627 int i = 0; 628 629 f_dfu->strings = calloc(sizeof(struct usb_string), n + 1); 630 if (!f_dfu->strings) 631 return -ENOMEM; 632 633 for (i = 0; i < n; ++i) { 634 de = dfu_get_entity(i); 635 f_dfu->strings[i].s = de->name; 636 } 637 638 f_dfu->strings[i].id = 0; 639 f_dfu->strings[i].s = NULL; 640 641 return 0; 642 } 643 644 static int dfu_prepare_function(struct f_dfu *f_dfu, int n) 645 { 646 struct usb_interface_descriptor *d; 647 int i = 0; 648 649 f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 2); 650 if (!f_dfu->function) 651 goto enomem; 652 653 for (i = 0; i < n; ++i) { 654 d = calloc(sizeof(*d), 1); 655 if (!d) 656 goto enomem; 657 658 d->bLength = sizeof(*d); 659 d->bDescriptorType = USB_DT_INTERFACE; 660 d->bAlternateSetting = i; 661 d->bNumEndpoints = 0; 662 d->bInterfaceClass = USB_CLASS_APP_SPEC; 663 d->bInterfaceSubClass = 1; 664 d->bInterfaceProtocol = 2; 665 666 f_dfu->function[i] = (struct usb_descriptor_header *)d; 667 } 668 669 /* add DFU Functional Descriptor */ 670 f_dfu->function[i] = calloc(sizeof(dfu_func), 1); 671 if (!f_dfu->function[i]) 672 goto enomem; 673 memcpy(f_dfu->function[i], &dfu_func, sizeof(dfu_func)); 674 675 i++; 676 f_dfu->function[i] = NULL; 677 678 return 0; 679 680 enomem: 681 while (i) { 682 free(f_dfu->function[--i]); 683 f_dfu->function[i] = NULL; 684 } 685 free(f_dfu->function); 686 687 return -ENOMEM; 688 } 689 690 static int dfu_bind(struct usb_configuration *c, struct usb_function *f) 691 { 692 struct usb_composite_dev *cdev = c->cdev; 693 struct f_dfu *f_dfu = func_to_dfu(f); 694 const char *s; 695 int alt_num = dfu_get_alt_number(); 696 int rv, id, i; 697 698 id = usb_interface_id(c, f); 699 if (id < 0) 700 return id; 701 dfu_intf_runtime.bInterfaceNumber = id; 702 703 f_dfu->dfu_state = DFU_STATE_appIDLE; 704 f_dfu->dfu_status = DFU_STATUS_OK; 705 706 rv = dfu_prepare_function(f_dfu, alt_num); 707 if (rv) 708 goto error; 709 710 rv = dfu_prepare_strings(f_dfu, alt_num); 711 if (rv) 712 goto error; 713 for (i = 0; i < alt_num; i++) { 714 id = usb_string_id(cdev); 715 if (id < 0) 716 return id; 717 f_dfu->strings[i].id = id; 718 ((struct usb_interface_descriptor *)f_dfu->function[i]) 719 ->iInterface = id; 720 } 721 722 to_dfu_mode(f_dfu); 723 724 stringtab_dfu.strings = f_dfu->strings; 725 726 cdev->req->context = f_dfu; 727 728 s = getenv("serial#"); 729 if (s) 730 g_dnl_set_serialnumber((char *)s); 731 732 error: 733 return rv; 734 } 735 736 static void dfu_unbind(struct usb_configuration *c, struct usb_function *f) 737 { 738 struct f_dfu *f_dfu = func_to_dfu(f); 739 int alt_num = dfu_get_alt_number(); 740 int i; 741 742 if (f_dfu->strings) { 743 i = alt_num; 744 while (i) 745 f_dfu->strings[--i].s = NULL; 746 747 free(f_dfu->strings); 748 } 749 750 if (f_dfu->function) { 751 i = alt_num; 752 while (i) { 753 free(f_dfu->function[--i]); 754 f_dfu->function[i] = NULL; 755 } 756 free(f_dfu->function); 757 } 758 759 free(f_dfu); 760 } 761 762 static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 763 { 764 struct f_dfu *f_dfu = func_to_dfu(f); 765 766 debug("%s: intf:%d alt:%d\n", __func__, intf, alt); 767 768 f_dfu->altsetting = alt; 769 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 770 f_dfu->dfu_status = DFU_STATUS_OK; 771 772 return 0; 773 } 774 775 static int __dfu_get_alt(struct usb_function *f, unsigned intf) 776 { 777 struct f_dfu *f_dfu = func_to_dfu(f); 778 779 return f_dfu->altsetting; 780 } 781 782 /* TODO: is this really what we need here? */ 783 static void dfu_disable(struct usb_function *f) 784 { 785 struct f_dfu *f_dfu = func_to_dfu(f); 786 if (f_dfu->config == 0) 787 return; 788 789 debug("%s: reset config\n", __func__); 790 791 f_dfu->config = 0; 792 } 793 794 static int dfu_bind_config(struct usb_configuration *c) 795 { 796 struct f_dfu *f_dfu; 797 int status; 798 799 f_dfu = calloc(sizeof(*f_dfu), 1); 800 if (!f_dfu) 801 return -ENOMEM; 802 f_dfu->usb_function.name = "dfu"; 803 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 804 f_dfu->usb_function.descriptors = dfu_runtime_descs; 805 f_dfu->usb_function.bind = dfu_bind; 806 f_dfu->usb_function.unbind = dfu_unbind; 807 f_dfu->usb_function.set_alt = dfu_set_alt; 808 f_dfu->usb_function.get_alt = __dfu_get_alt; 809 f_dfu->usb_function.disable = dfu_disable; 810 f_dfu->usb_function.strings = dfu_generic_strings; 811 f_dfu->usb_function.setup = dfu_handle; 812 f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT; 813 814 status = usb_add_function(c, &f_dfu->usb_function); 815 if (status) 816 free(f_dfu); 817 818 return status; 819 } 820 821 int dfu_add(struct usb_configuration *c) 822 { 823 int id; 824 825 id = usb_string_id(c->cdev); 826 if (id < 0) 827 return id; 828 strings_dfu_generic[0].id = id; 829 dfu_intf_runtime.iInterface = id; 830 831 debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__, 832 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 833 834 return dfu_bind_config(c); 835 } 836 837 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add); 838