1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * f_dfu.c -- Device Firmware Update USB function 4 * 5 * Copyright (C) 2012 Samsung Electronics 6 * authors: Andrzej Pietrasiewicz <andrzej.p (at) samsung.com> 7 * Lukasz Majewski <l.majewski (at) samsung.com> 8 * 9 * Based on OpenMoko u-boot: drivers/usb/usbdfu.c 10 * (C) 2007 by OpenMoko, Inc. 11 * Author: Harald Welte <laforge (at) openmoko.org> 12 * 13 * based on existing SAM7DFU code from OpenPCD: 14 * (C) Copyright 2006 by Harald Welte <hwelte at hmw-consulting.de> 15 */ 16 17 #include <errno.h> 18 #include <common.h> 19 #include <malloc.h> 20 21 #include <linux/usb/ch9.h> 22 #include <linux/usb/gadget.h> 23 #include <linux/usb/composite.h> 24 25 #include <dfu.h> 26 #include <g_dnl.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 struct dfu_entity *dfu_defer_flush; 47 48 typedef int (*dfu_state_fn) (struct f_dfu *, 49 const struct usb_ctrlrequest *, 50 struct usb_gadget *, 51 struct usb_request *); 52 53 static inline struct f_dfu *func_to_dfu(struct usb_function *f) 54 { 55 return container_of(f, struct f_dfu, usb_function); 56 } 57 58 static const struct dfu_function_descriptor dfu_func = { 59 .bLength = sizeof dfu_func, 60 .bDescriptorType = DFU_DT_FUNC, 61 .bmAttributes = DFU_BIT_WILL_DETACH | 62 DFU_BIT_MANIFESTATION_TOLERANT | 63 DFU_BIT_CAN_UPLOAD | 64 DFU_BIT_CAN_DNLOAD, 65 .wDetachTimeOut = 0, 66 .wTransferSize = DFU_USB_BUFSIZ, 67 .bcdDFUVersion = __constant_cpu_to_le16(0x0110), 68 }; 69 70 static struct usb_interface_descriptor dfu_intf_runtime = { 71 .bLength = sizeof dfu_intf_runtime, 72 .bDescriptorType = USB_DT_INTERFACE, 73 .bNumEndpoints = 0, 74 .bInterfaceClass = USB_CLASS_APP_SPEC, 75 .bInterfaceSubClass = 1, 76 .bInterfaceProtocol = 1, 77 /* .iInterface = DYNAMIC */ 78 }; 79 80 static struct usb_descriptor_header *dfu_runtime_descs[] = { 81 (struct usb_descriptor_header *) &dfu_intf_runtime, 82 NULL, 83 }; 84 85 static const char dfu_name[] = "Device Firmware Upgrade"; 86 87 /* 88 * static strings, in UTF-8 89 * 90 * dfu_generic configuration 91 */ 92 static struct usb_string strings_dfu_generic[] = { 93 [0].s = dfu_name, 94 { } /* end of list */ 95 }; 96 97 static struct usb_gadget_strings stringtab_dfu_generic = { 98 .language = 0x0409, /* en-us */ 99 .strings = strings_dfu_generic, 100 }; 101 102 static struct usb_gadget_strings *dfu_generic_strings[] = { 103 &stringtab_dfu_generic, 104 NULL, 105 }; 106 107 /* 108 * usb_function specific 109 */ 110 static struct usb_gadget_strings stringtab_dfu = { 111 .language = 0x0409, /* en-us */ 112 /* 113 * .strings 114 * 115 * assigned during initialization, 116 * depends on number of flash entities 117 * 118 */ 119 }; 120 121 static struct usb_gadget_strings *dfu_strings[] = { 122 &stringtab_dfu, 123 NULL, 124 }; 125 126 static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms) 127 { 128 /* 129 * The bwPollTimeout DFU_GETSTATUS request payload provides information 130 * about minimum time, in milliseconds, that the host should wait before 131 * sending a subsequent DFU_GETSTATUS request 132 * 133 * This permits the device to vary the delay depending on its need to 134 * erase or program the memory 135 * 136 */ 137 138 unsigned char *p = (unsigned char *)&ms; 139 140 if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) { 141 dstat->bwPollTimeout[0] = 0; 142 dstat->bwPollTimeout[1] = 0; 143 dstat->bwPollTimeout[2] = 0; 144 145 return; 146 } 147 148 dstat->bwPollTimeout[0] = *p++; 149 dstat->bwPollTimeout[1] = *p++; 150 dstat->bwPollTimeout[2] = *p; 151 } 152 153 /*-------------------------------------------------------------------------*/ 154 155 static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req) 156 { 157 struct f_dfu *f_dfu = req->context; 158 int ret; 159 160 ret = dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf, 161 req->actual, f_dfu->blk_seq_num); 162 if (ret) { 163 f_dfu->dfu_status = DFU_STATUS_errUNKNOWN; 164 f_dfu->dfu_state = DFU_STATE_dfuERROR; 165 } 166 } 167 168 static void dnload_request_flush(struct usb_ep *ep, struct usb_request *req) 169 { 170 struct f_dfu *f_dfu = req->context; 171 dfu_set_defer_flush(dfu_get_entity(f_dfu->altsetting)); 172 } 173 174 static inline int dfu_get_manifest_timeout(struct dfu_entity *dfu) 175 { 176 return dfu->poll_timeout ? dfu->poll_timeout(dfu) : 177 DFU_MANIFEST_POLL_TIMEOUT; 178 } 179 180 static int handle_getstatus(struct usb_request *req) 181 { 182 struct dfu_status *dstat = (struct dfu_status *)req->buf; 183 struct f_dfu *f_dfu = req->context; 184 struct dfu_entity *dfu = dfu_get_entity(f_dfu->altsetting); 185 186 dfu_set_poll_timeout(dstat, 0); 187 188 switch (f_dfu->dfu_state) { 189 case DFU_STATE_dfuDNLOAD_SYNC: 190 case DFU_STATE_dfuDNBUSY: 191 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE; 192 break; 193 case DFU_STATE_dfuMANIFEST_SYNC: 194 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 195 break; 196 case DFU_STATE_dfuMANIFEST: 197 dfu_set_poll_timeout(dstat, dfu_get_manifest_timeout(dfu)); 198 break; 199 default: 200 break; 201 } 202 203 if (f_dfu->poll_timeout) 204 if (!(f_dfu->blk_seq_num % 205 (dfu_get_buf_size() / DFU_USB_BUFSIZ))) 206 dfu_set_poll_timeout(dstat, f_dfu->poll_timeout); 207 208 /* send status response */ 209 dstat->bStatus = f_dfu->dfu_status; 210 dstat->bState = f_dfu->dfu_state; 211 dstat->iString = 0; 212 213 return sizeof(struct dfu_status); 214 } 215 216 static int handle_getstate(struct usb_request *req) 217 { 218 struct f_dfu *f_dfu = req->context; 219 220 ((u8 *)req->buf)[0] = f_dfu->dfu_state; 221 return sizeof(u8); 222 } 223 224 static inline void to_dfu_mode(struct f_dfu *f_dfu) 225 { 226 f_dfu->usb_function.strings = dfu_strings; 227 f_dfu->usb_function.hs_descriptors = f_dfu->function; 228 f_dfu->usb_function.descriptors = f_dfu->function; 229 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 230 } 231 232 static inline void to_runtime_mode(struct f_dfu *f_dfu) 233 { 234 f_dfu->usb_function.strings = NULL; 235 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 236 f_dfu->usb_function.descriptors = dfu_runtime_descs; 237 } 238 239 static int handle_upload(struct usb_request *req, u16 len) 240 { 241 struct f_dfu *f_dfu = req->context; 242 243 return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf, 244 req->length, f_dfu->blk_seq_num); 245 } 246 247 static int handle_dnload(struct usb_gadget *gadget, u16 len) 248 { 249 struct usb_composite_dev *cdev = get_gadget_data(gadget); 250 struct usb_request *req = cdev->req; 251 struct f_dfu *f_dfu = req->context; 252 253 if (len == 0) 254 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC; 255 256 req->complete = dnload_request_complete; 257 258 return len; 259 } 260 261 /*-------------------------------------------------------------------------*/ 262 /* DFU state machine */ 263 static int state_app_idle(struct f_dfu *f_dfu, 264 const struct usb_ctrlrequest *ctrl, 265 struct usb_gadget *gadget, 266 struct usb_request *req) 267 { 268 int value = 0; 269 270 switch (ctrl->bRequest) { 271 case USB_REQ_DFU_GETSTATUS: 272 value = handle_getstatus(req); 273 break; 274 case USB_REQ_DFU_GETSTATE: 275 value = handle_getstate(req); 276 break; 277 case USB_REQ_DFU_DETACH: 278 f_dfu->dfu_state = DFU_STATE_appDETACH; 279 to_dfu_mode(f_dfu); 280 value = RET_ZLP; 281 break; 282 default: 283 value = RET_STALL; 284 break; 285 } 286 287 return value; 288 } 289 290 static int state_app_detach(struct f_dfu *f_dfu, 291 const struct usb_ctrlrequest *ctrl, 292 struct usb_gadget *gadget, 293 struct usb_request *req) 294 { 295 int value = 0; 296 297 switch (ctrl->bRequest) { 298 case USB_REQ_DFU_GETSTATUS: 299 value = handle_getstatus(req); 300 break; 301 case USB_REQ_DFU_GETSTATE: 302 value = handle_getstate(req); 303 break; 304 default: 305 f_dfu->dfu_state = DFU_STATE_appIDLE; 306 value = RET_STALL; 307 break; 308 } 309 310 return value; 311 } 312 313 static int state_dfu_idle(struct f_dfu *f_dfu, 314 const struct usb_ctrlrequest *ctrl, 315 struct usb_gadget *gadget, 316 struct usb_request *req) 317 { 318 u16 w_value = le16_to_cpu(ctrl->wValue); 319 u16 len = le16_to_cpu(ctrl->wLength); 320 int value = 0; 321 322 switch (ctrl->bRequest) { 323 case USB_REQ_DFU_DNLOAD: 324 if (len == 0) { 325 f_dfu->dfu_state = DFU_STATE_dfuERROR; 326 value = RET_STALL; 327 break; 328 } 329 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 330 f_dfu->blk_seq_num = w_value; 331 value = handle_dnload(gadget, len); 332 break; 333 case USB_REQ_DFU_UPLOAD: 334 f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE; 335 f_dfu->blk_seq_num = 0; 336 value = handle_upload(req, len); 337 break; 338 case USB_REQ_DFU_ABORT: 339 /* no zlp? */ 340 value = RET_ZLP; 341 break; 342 case USB_REQ_DFU_GETSTATUS: 343 value = handle_getstatus(req); 344 break; 345 case USB_REQ_DFU_GETSTATE: 346 value = handle_getstate(req); 347 break; 348 case USB_REQ_DFU_DETACH: 349 /* 350 * Proprietary extension: 'detach' from idle mode and 351 * get back to runtime mode in case of USB Reset. As 352 * much as I dislike this, we just can't use every USB 353 * bus reset to switch back to runtime mode, since at 354 * least the Linux USB stack likes to send a number of 355 * resets in a row :( 356 */ 357 f_dfu->dfu_state = 358 DFU_STATE_dfuMANIFEST_WAIT_RST; 359 to_runtime_mode(f_dfu); 360 f_dfu->dfu_state = DFU_STATE_appIDLE; 361 362 g_dnl_trigger_detach(); 363 break; 364 default: 365 f_dfu->dfu_state = DFU_STATE_dfuERROR; 366 value = RET_STALL; 367 break; 368 } 369 370 return value; 371 } 372 373 static int state_dfu_dnload_sync(struct f_dfu *f_dfu, 374 const struct usb_ctrlrequest *ctrl, 375 struct usb_gadget *gadget, 376 struct usb_request *req) 377 { 378 int value = 0; 379 380 switch (ctrl->bRequest) { 381 case USB_REQ_DFU_GETSTATUS: 382 value = handle_getstatus(req); 383 break; 384 case USB_REQ_DFU_GETSTATE: 385 value = handle_getstate(req); 386 break; 387 default: 388 f_dfu->dfu_state = DFU_STATE_dfuERROR; 389 value = RET_STALL; 390 break; 391 } 392 393 return value; 394 } 395 396 static int state_dfu_dnbusy(struct f_dfu *f_dfu, 397 const struct usb_ctrlrequest *ctrl, 398 struct usb_gadget *gadget, 399 struct usb_request *req) 400 { 401 int value = 0; 402 403 switch (ctrl->bRequest) { 404 case USB_REQ_DFU_GETSTATUS: 405 value = handle_getstatus(req); 406 break; 407 default: 408 f_dfu->dfu_state = DFU_STATE_dfuERROR; 409 value = RET_STALL; 410 break; 411 } 412 413 return value; 414 } 415 416 static int state_dfu_dnload_idle(struct f_dfu *f_dfu, 417 const struct usb_ctrlrequest *ctrl, 418 struct usb_gadget *gadget, 419 struct usb_request *req) 420 { 421 u16 w_value = le16_to_cpu(ctrl->wValue); 422 u16 len = le16_to_cpu(ctrl->wLength); 423 int value = 0; 424 425 switch (ctrl->bRequest) { 426 case USB_REQ_DFU_DNLOAD: 427 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 428 f_dfu->blk_seq_num = w_value; 429 value = handle_dnload(gadget, len); 430 break; 431 case USB_REQ_DFU_ABORT: 432 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 433 value = RET_ZLP; 434 break; 435 case USB_REQ_DFU_GETSTATUS: 436 value = handle_getstatus(req); 437 break; 438 case USB_REQ_DFU_GETSTATE: 439 value = handle_getstate(req); 440 break; 441 default: 442 f_dfu->dfu_state = DFU_STATE_dfuERROR; 443 value = RET_STALL; 444 break; 445 } 446 447 return value; 448 } 449 450 static int state_dfu_manifest_sync(struct f_dfu *f_dfu, 451 const struct usb_ctrlrequest *ctrl, 452 struct usb_gadget *gadget, 453 struct usb_request *req) 454 { 455 int value = 0; 456 457 switch (ctrl->bRequest) { 458 case USB_REQ_DFU_GETSTATUS: 459 /* We're MainfestationTolerant */ 460 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 461 value = handle_getstatus(req); 462 f_dfu->blk_seq_num = 0; 463 req->complete = dnload_request_flush; 464 break; 465 case USB_REQ_DFU_GETSTATE: 466 value = handle_getstate(req); 467 break; 468 default: 469 f_dfu->dfu_state = DFU_STATE_dfuERROR; 470 value = RET_STALL; 471 break; 472 } 473 474 return value; 475 } 476 477 static int state_dfu_manifest(struct f_dfu *f_dfu, 478 const struct usb_ctrlrequest *ctrl, 479 struct usb_gadget *gadget, 480 struct usb_request *req) 481 { 482 int value = 0; 483 484 switch (ctrl->bRequest) { 485 case USB_REQ_DFU_GETSTATUS: 486 /* We're MainfestationTolerant */ 487 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 488 value = handle_getstatus(req); 489 f_dfu->blk_seq_num = 0; 490 puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n"); 491 break; 492 case USB_REQ_DFU_GETSTATE: 493 value = handle_getstate(req); 494 break; 495 default: 496 f_dfu->dfu_state = DFU_STATE_dfuERROR; 497 value = RET_STALL; 498 break; 499 } 500 return value; 501 } 502 503 static int state_dfu_upload_idle(struct f_dfu *f_dfu, 504 const struct usb_ctrlrequest *ctrl, 505 struct usb_gadget *gadget, 506 struct usb_request *req) 507 { 508 u16 w_value = le16_to_cpu(ctrl->wValue); 509 u16 len = le16_to_cpu(ctrl->wLength); 510 int value = 0; 511 512 switch (ctrl->bRequest) { 513 case USB_REQ_DFU_UPLOAD: 514 /* state transition if less data then requested */ 515 f_dfu->blk_seq_num = w_value; 516 value = handle_upload(req, len); 517 if (value >= 0 && value < len) 518 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 519 break; 520 case USB_REQ_DFU_ABORT: 521 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 522 /* no zlp? */ 523 value = RET_ZLP; 524 break; 525 case USB_REQ_DFU_GETSTATUS: 526 value = handle_getstatus(req); 527 break; 528 case USB_REQ_DFU_GETSTATE: 529 value = handle_getstate(req); 530 break; 531 default: 532 f_dfu->dfu_state = DFU_STATE_dfuERROR; 533 value = RET_STALL; 534 break; 535 } 536 537 return value; 538 } 539 540 static int state_dfu_error(struct f_dfu *f_dfu, 541 const struct usb_ctrlrequest *ctrl, 542 struct usb_gadget *gadget, 543 struct usb_request *req) 544 { 545 int value = 0; 546 547 switch (ctrl->bRequest) { 548 case USB_REQ_DFU_GETSTATUS: 549 value = handle_getstatus(req); 550 break; 551 case USB_REQ_DFU_GETSTATE: 552 value = handle_getstate(req); 553 break; 554 case USB_REQ_DFU_CLRSTATUS: 555 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 556 f_dfu->dfu_status = DFU_STATUS_OK; 557 /* no zlp? */ 558 value = RET_ZLP; 559 break; 560 default: 561 f_dfu->dfu_state = DFU_STATE_dfuERROR; 562 value = RET_STALL; 563 break; 564 } 565 566 return value; 567 } 568 569 static dfu_state_fn dfu_state[] = { 570 state_app_idle, /* DFU_STATE_appIDLE */ 571 state_app_detach, /* DFU_STATE_appDETACH */ 572 state_dfu_idle, /* DFU_STATE_dfuIDLE */ 573 state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */ 574 state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */ 575 state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */ 576 state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */ 577 state_dfu_manifest, /* DFU_STATE_dfuMANIFEST */ 578 NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */ 579 state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */ 580 state_dfu_error /* DFU_STATE_dfuERROR */ 581 }; 582 583 static int 584 dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 585 { 586 struct usb_gadget *gadget = f->config->cdev->gadget; 587 struct usb_request *req = f->config->cdev->req; 588 struct f_dfu *f_dfu = f->config->cdev->req->context; 589 u16 len = le16_to_cpu(ctrl->wLength); 590 u16 w_value = le16_to_cpu(ctrl->wValue); 591 int value = 0; 592 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 593 594 debug("w_value: 0x%x len: 0x%x\n", w_value, len); 595 debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n", 596 req_type, ctrl->bRequest, f_dfu->dfu_state); 597 598 if (req_type == USB_TYPE_STANDARD) { 599 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR && 600 (w_value >> 8) == DFU_DT_FUNC) { 601 value = min(len, (u16) sizeof(dfu_func)); 602 memcpy(req->buf, &dfu_func, value); 603 } 604 } else /* DFU specific request */ 605 value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req); 606 607 if (value >= 0) { 608 req->length = value; 609 req->zero = value < len; 610 value = usb_ep_queue(gadget->ep0, req, 0); 611 if (value < 0) { 612 debug("ep_queue --> %d\n", value); 613 req->status = 0; 614 } 615 } 616 617 return value; 618 } 619 620 /*-------------------------------------------------------------------------*/ 621 622 static int 623 dfu_prepare_strings(struct f_dfu *f_dfu, int n) 624 { 625 struct dfu_entity *de = NULL; 626 int i = 0; 627 628 f_dfu->strings = calloc(sizeof(struct usb_string), n + 1); 629 if (!f_dfu->strings) 630 return -ENOMEM; 631 632 for (i = 0; i < n; ++i) { 633 de = dfu_get_entity(i); 634 f_dfu->strings[i].s = de->name; 635 } 636 637 f_dfu->strings[i].id = 0; 638 f_dfu->strings[i].s = NULL; 639 640 return 0; 641 } 642 643 static int dfu_prepare_function(struct f_dfu *f_dfu, int n) 644 { 645 struct usb_interface_descriptor *d; 646 int i = 0; 647 648 f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 2); 649 if (!f_dfu->function) 650 goto enomem; 651 652 for (i = 0; i < n; ++i) { 653 d = calloc(sizeof(*d), 1); 654 if (!d) 655 goto enomem; 656 657 d->bLength = sizeof(*d); 658 d->bDescriptorType = USB_DT_INTERFACE; 659 d->bAlternateSetting = i; 660 d->bNumEndpoints = 0; 661 d->bInterfaceClass = USB_CLASS_APP_SPEC; 662 d->bInterfaceSubClass = 1; 663 d->bInterfaceProtocol = 2; 664 665 f_dfu->function[i] = (struct usb_descriptor_header *)d; 666 } 667 668 /* add DFU Functional Descriptor */ 669 f_dfu->function[i] = calloc(sizeof(dfu_func), 1); 670 if (!f_dfu->function[i]) 671 goto enomem; 672 memcpy(f_dfu->function[i], &dfu_func, sizeof(dfu_func)); 673 674 i++; 675 f_dfu->function[i] = NULL; 676 677 return 0; 678 679 enomem: 680 while (i) { 681 free(f_dfu->function[--i]); 682 f_dfu->function[i] = NULL; 683 } 684 free(f_dfu->function); 685 686 return -ENOMEM; 687 } 688 689 static int dfu_bind(struct usb_configuration *c, struct usb_function *f) 690 { 691 struct usb_composite_dev *cdev = c->cdev; 692 struct f_dfu *f_dfu = func_to_dfu(f); 693 const char *s; 694 int alt_num = dfu_get_alt_number(); 695 int rv, id, i; 696 697 id = usb_interface_id(c, f); 698 if (id < 0) 699 return id; 700 dfu_intf_runtime.bInterfaceNumber = id; 701 702 f_dfu->dfu_state = DFU_STATE_appIDLE; 703 f_dfu->dfu_status = DFU_STATUS_OK; 704 705 rv = dfu_prepare_function(f_dfu, alt_num); 706 if (rv) 707 goto error; 708 709 rv = dfu_prepare_strings(f_dfu, alt_num); 710 if (rv) 711 goto error; 712 for (i = 0; i < alt_num; i++) { 713 id = usb_string_id(cdev); 714 if (id < 0) 715 return id; 716 f_dfu->strings[i].id = id; 717 ((struct usb_interface_descriptor *)f_dfu->function[i]) 718 ->iInterface = id; 719 } 720 721 to_dfu_mode(f_dfu); 722 723 stringtab_dfu.strings = f_dfu->strings; 724 725 cdev->req->context = f_dfu; 726 727 s = env_get("serial#"); 728 if (s) 729 g_dnl_set_serialnumber((char *)s); 730 731 error: 732 return rv; 733 } 734 735 static void dfu_unbind(struct usb_configuration *c, struct usb_function *f) 736 { 737 struct f_dfu *f_dfu = func_to_dfu(f); 738 int alt_num = dfu_get_alt_number(); 739 int i; 740 741 if (f_dfu->strings) { 742 i = alt_num; 743 while (i) 744 f_dfu->strings[--i].s = NULL; 745 746 free(f_dfu->strings); 747 } 748 749 if (f_dfu->function) { 750 i = alt_num; 751 while (i) { 752 free(f_dfu->function[--i]); 753 f_dfu->function[i] = NULL; 754 } 755 free(f_dfu->function); 756 } 757 758 free(f_dfu); 759 } 760 761 static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 762 { 763 struct f_dfu *f_dfu = func_to_dfu(f); 764 765 debug("%s: intf:%d alt:%d\n", __func__, intf, alt); 766 767 f_dfu->altsetting = alt; 768 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 769 f_dfu->dfu_status = DFU_STATUS_OK; 770 771 return 0; 772 } 773 774 static int __dfu_get_alt(struct usb_function *f, unsigned intf) 775 { 776 struct f_dfu *f_dfu = func_to_dfu(f); 777 778 return f_dfu->altsetting; 779 } 780 781 /* TODO: is this really what we need here? */ 782 static void dfu_disable(struct usb_function *f) 783 { 784 struct f_dfu *f_dfu = func_to_dfu(f); 785 if (f_dfu->config == 0) 786 return; 787 788 debug("%s: reset config\n", __func__); 789 790 f_dfu->config = 0; 791 } 792 793 static int dfu_bind_config(struct usb_configuration *c) 794 { 795 struct f_dfu *f_dfu; 796 int status; 797 798 f_dfu = calloc(sizeof(*f_dfu), 1); 799 if (!f_dfu) 800 return -ENOMEM; 801 f_dfu->usb_function.name = "dfu"; 802 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 803 f_dfu->usb_function.descriptors = dfu_runtime_descs; 804 f_dfu->usb_function.bind = dfu_bind; 805 f_dfu->usb_function.unbind = dfu_unbind; 806 f_dfu->usb_function.set_alt = dfu_set_alt; 807 f_dfu->usb_function.get_alt = __dfu_get_alt; 808 f_dfu->usb_function.disable = dfu_disable; 809 f_dfu->usb_function.strings = dfu_generic_strings; 810 f_dfu->usb_function.setup = dfu_handle; 811 f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT; 812 813 status = usb_add_function(c, &f_dfu->usb_function); 814 if (status) 815 free(f_dfu); 816 817 return status; 818 } 819 820 int dfu_add(struct usb_configuration *c) 821 { 822 int id; 823 824 id = usb_string_id(c->cdev); 825 if (id < 0) 826 return id; 827 strings_dfu_generic[0].id = id; 828 dfu_intf_runtime.iInterface = id; 829 830 debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__, 831 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 832 833 return dfu_bind_config(c); 834 } 835 836 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add); 837
