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 typedef int (*dfu_state_fn) (struct f_dfu *, 48 const struct usb_ctrlrequest *, 49 struct usb_gadget *, 50 struct usb_request *); 51 52 static inline struct f_dfu *func_to_dfu(struct usb_function *f) 53 { 54 return container_of(f, struct f_dfu, usb_function); 55 } 56 57 static const struct dfu_function_descriptor dfu_func = { 58 .bLength = sizeof dfu_func, 59 .bDescriptorType = DFU_DT_FUNC, 60 .bmAttributes = DFU_BIT_WILL_DETACH | 61 DFU_BIT_MANIFESTATION_TOLERANT | 62 DFU_BIT_CAN_UPLOAD | 63 DFU_BIT_CAN_DNLOAD, 64 .wDetachTimeOut = 0, 65 .wTransferSize = DFU_USB_BUFSIZ, 66 .bcdDFUVersion = __constant_cpu_to_le16(0x0110), 67 }; 68 69 static struct usb_interface_descriptor dfu_intf_runtime = { 70 .bLength = sizeof dfu_intf_runtime, 71 .bDescriptorType = USB_DT_INTERFACE, 72 .bNumEndpoints = 0, 73 .bInterfaceClass = USB_CLASS_APP_SPEC, 74 .bInterfaceSubClass = 1, 75 .bInterfaceProtocol = 1, 76 /* .iInterface = DYNAMIC */ 77 }; 78 79 static struct usb_descriptor_header *dfu_runtime_descs[] = { 80 (struct usb_descriptor_header *) &dfu_intf_runtime, 81 NULL, 82 }; 83 84 static const struct usb_qualifier_descriptor dev_qualifier = { 85 .bLength = sizeof dev_qualifier, 86 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 87 .bcdUSB = __constant_cpu_to_le16(0x0200), 88 .bDeviceClass = USB_CLASS_VENDOR_SPEC, 89 .bNumConfigurations = 1, 90 }; 91 92 static const char dfu_name[] = "Device Firmware Upgrade"; 93 94 /* 95 * static strings, in UTF-8 96 * 97 * dfu_generic configuration 98 */ 99 static struct usb_string strings_dfu_generic[] = { 100 [0].s = dfu_name, 101 { } /* end of list */ 102 }; 103 104 static struct usb_gadget_strings stringtab_dfu_generic = { 105 .language = 0x0409, /* en-us */ 106 .strings = strings_dfu_generic, 107 }; 108 109 static struct usb_gadget_strings *dfu_generic_strings[] = { 110 &stringtab_dfu_generic, 111 NULL, 112 }; 113 114 /* 115 * usb_function specific 116 */ 117 static struct usb_gadget_strings stringtab_dfu = { 118 .language = 0x0409, /* en-us */ 119 /* 120 * .strings 121 * 122 * assigned during initialization, 123 * depends on number of flash entities 124 * 125 */ 126 }; 127 128 static struct usb_gadget_strings *dfu_strings[] = { 129 &stringtab_dfu, 130 NULL, 131 }; 132 133 static void dfu_set_poll_timeout(struct dfu_status *dstat, unsigned int ms) 134 { 135 /* 136 * The bwPollTimeout DFU_GETSTATUS request payload provides information 137 * about minimum time, in milliseconds, that the host should wait before 138 * sending a subsequent DFU_GETSTATUS request 139 * 140 * This permits the device to vary the delay depending on its need to 141 * erase or program the memory 142 * 143 */ 144 145 unsigned char *p = (unsigned char *)&ms; 146 147 if (!ms || (ms & ~DFU_POLL_TIMEOUT_MASK)) { 148 dstat->bwPollTimeout[0] = 0; 149 dstat->bwPollTimeout[1] = 0; 150 dstat->bwPollTimeout[2] = 0; 151 152 return; 153 } 154 155 dstat->bwPollTimeout[0] = *p++; 156 dstat->bwPollTimeout[1] = *p++; 157 dstat->bwPollTimeout[2] = *p; 158 } 159 160 /*-------------------------------------------------------------------------*/ 161 162 static void dnload_request_complete(struct usb_ep *ep, struct usb_request *req) 163 { 164 struct f_dfu *f_dfu = req->context; 165 166 dfu_write(dfu_get_entity(f_dfu->altsetting), req->buf, 167 req->length, f_dfu->blk_seq_num); 168 } 169 170 static void dnload_request_flush(struct usb_ep *ep, struct usb_request *req) 171 { 172 struct f_dfu *f_dfu = req->context; 173 174 dfu_flush(dfu_get_entity(f_dfu->altsetting), req->buf, 175 req->length, f_dfu->blk_seq_num); 176 } 177 178 static void handle_getstatus(struct usb_request *req) 179 { 180 struct dfu_status *dstat = (struct dfu_status *)req->buf; 181 struct f_dfu *f_dfu = req->context; 182 183 dfu_set_poll_timeout(dstat, 0); 184 185 switch (f_dfu->dfu_state) { 186 case DFU_STATE_dfuDNLOAD_SYNC: 187 case DFU_STATE_dfuDNBUSY: 188 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_IDLE; 189 break; 190 case DFU_STATE_dfuMANIFEST_SYNC: 191 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 192 break; 193 case DFU_STATE_dfuMANIFEST: 194 dfu_set_poll_timeout(dstat, DFU_MANIFEST_POLL_TIMEOUT); 195 default: 196 break; 197 } 198 199 if (f_dfu->poll_timeout) 200 if (!(f_dfu->blk_seq_num % 201 (dfu_get_buf_size() / DFU_USB_BUFSIZ))) 202 dfu_set_poll_timeout(dstat, f_dfu->poll_timeout); 203 204 /* send status response */ 205 dstat->bStatus = f_dfu->dfu_status; 206 dstat->bState = f_dfu->dfu_state; 207 dstat->iString = 0; 208 } 209 210 static void handle_getstate(struct usb_request *req) 211 { 212 struct f_dfu *f_dfu = req->context; 213 214 ((u8 *)req->buf)[0] = f_dfu->dfu_state; 215 req->actual = sizeof(u8); 216 } 217 218 static inline void to_dfu_mode(struct f_dfu *f_dfu) 219 { 220 f_dfu->usb_function.strings = dfu_strings; 221 f_dfu->usb_function.hs_descriptors = f_dfu->function; 222 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 223 } 224 225 static inline void to_runtime_mode(struct f_dfu *f_dfu) 226 { 227 f_dfu->usb_function.strings = NULL; 228 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 229 } 230 231 static int handle_upload(struct usb_request *req, u16 len) 232 { 233 struct f_dfu *f_dfu = req->context; 234 235 return dfu_read(dfu_get_entity(f_dfu->altsetting), req->buf, 236 req->length, f_dfu->blk_seq_num); 237 } 238 239 static int handle_dnload(struct usb_gadget *gadget, u16 len) 240 { 241 struct usb_composite_dev *cdev = get_gadget_data(gadget); 242 struct usb_request *req = cdev->req; 243 struct f_dfu *f_dfu = req->context; 244 245 if (len == 0) 246 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST_SYNC; 247 248 req->complete = dnload_request_complete; 249 250 return len; 251 } 252 253 /*-------------------------------------------------------------------------*/ 254 /* DFU state machine */ 255 static int state_app_idle(struct f_dfu *f_dfu, 256 const struct usb_ctrlrequest *ctrl, 257 struct usb_gadget *gadget, 258 struct usb_request *req) 259 { 260 int value = 0; 261 262 switch (ctrl->bRequest) { 263 case USB_REQ_DFU_GETSTATUS: 264 handle_getstatus(req); 265 value = RET_STAT_LEN; 266 break; 267 case USB_REQ_DFU_GETSTATE: 268 handle_getstate(req); 269 break; 270 case USB_REQ_DFU_DETACH: 271 f_dfu->dfu_state = DFU_STATE_appDETACH; 272 to_dfu_mode(f_dfu); 273 value = RET_ZLP; 274 break; 275 default: 276 value = RET_STALL; 277 break; 278 } 279 280 return value; 281 } 282 283 static int state_app_detach(struct f_dfu *f_dfu, 284 const struct usb_ctrlrequest *ctrl, 285 struct usb_gadget *gadget, 286 struct usb_request *req) 287 { 288 int value = 0; 289 290 switch (ctrl->bRequest) { 291 case USB_REQ_DFU_GETSTATUS: 292 handle_getstatus(req); 293 value = RET_STAT_LEN; 294 break; 295 case USB_REQ_DFU_GETSTATE: 296 handle_getstate(req); 297 break; 298 default: 299 f_dfu->dfu_state = DFU_STATE_appIDLE; 300 value = RET_STALL; 301 break; 302 } 303 304 return value; 305 } 306 307 static int state_dfu_idle(struct f_dfu *f_dfu, 308 const struct usb_ctrlrequest *ctrl, 309 struct usb_gadget *gadget, 310 struct usb_request *req) 311 { 312 u16 w_value = le16_to_cpu(ctrl->wValue); 313 u16 len = le16_to_cpu(ctrl->wLength); 314 int value = 0; 315 316 switch (ctrl->bRequest) { 317 case USB_REQ_DFU_DNLOAD: 318 if (len == 0) { 319 f_dfu->dfu_state = DFU_STATE_dfuERROR; 320 value = RET_STALL; 321 break; 322 } 323 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 324 f_dfu->blk_seq_num = w_value; 325 value = handle_dnload(gadget, len); 326 break; 327 case USB_REQ_DFU_UPLOAD: 328 f_dfu->dfu_state = DFU_STATE_dfuUPLOAD_IDLE; 329 f_dfu->blk_seq_num = 0; 330 value = handle_upload(req, len); 331 break; 332 case USB_REQ_DFU_ABORT: 333 /* no zlp? */ 334 value = RET_ZLP; 335 break; 336 case USB_REQ_DFU_GETSTATUS: 337 handle_getstatus(req); 338 value = RET_STAT_LEN; 339 break; 340 case USB_REQ_DFU_GETSTATE: 341 handle_getstate(req); 342 break; 343 case USB_REQ_DFU_DETACH: 344 /* 345 * Proprietary extension: 'detach' from idle mode and 346 * get back to runtime mode in case of USB Reset. As 347 * much as I dislike this, we just can't use every USB 348 * bus reset to switch back to runtime mode, since at 349 * least the Linux USB stack likes to send a number of 350 * resets in a row :( 351 */ 352 f_dfu->dfu_state = 353 DFU_STATE_dfuMANIFEST_WAIT_RST; 354 to_runtime_mode(f_dfu); 355 f_dfu->dfu_state = DFU_STATE_appIDLE; 356 357 dfu_trigger_reset(); 358 break; 359 default: 360 f_dfu->dfu_state = DFU_STATE_dfuERROR; 361 value = RET_STALL; 362 break; 363 } 364 365 return value; 366 } 367 368 static int state_dfu_dnload_sync(struct f_dfu *f_dfu, 369 const struct usb_ctrlrequest *ctrl, 370 struct usb_gadget *gadget, 371 struct usb_request *req) 372 { 373 int value = 0; 374 375 switch (ctrl->bRequest) { 376 case USB_REQ_DFU_GETSTATUS: 377 handle_getstatus(req); 378 value = RET_STAT_LEN; 379 break; 380 case USB_REQ_DFU_GETSTATE: 381 handle_getstate(req); 382 break; 383 default: 384 f_dfu->dfu_state = DFU_STATE_dfuERROR; 385 value = RET_STALL; 386 break; 387 } 388 389 return value; 390 } 391 392 static int state_dfu_dnbusy(struct f_dfu *f_dfu, 393 const struct usb_ctrlrequest *ctrl, 394 struct usb_gadget *gadget, 395 struct usb_request *req) 396 { 397 int value = 0; 398 399 switch (ctrl->bRequest) { 400 case USB_REQ_DFU_GETSTATUS: 401 handle_getstatus(req); 402 value = RET_STAT_LEN; 403 break; 404 default: 405 f_dfu->dfu_state = DFU_STATE_dfuERROR; 406 value = RET_STALL; 407 break; 408 } 409 410 return value; 411 } 412 413 static int state_dfu_dnload_idle(struct f_dfu *f_dfu, 414 const struct usb_ctrlrequest *ctrl, 415 struct usb_gadget *gadget, 416 struct usb_request *req) 417 { 418 u16 w_value = le16_to_cpu(ctrl->wValue); 419 u16 len = le16_to_cpu(ctrl->wLength); 420 int value = 0; 421 422 switch (ctrl->bRequest) { 423 case USB_REQ_DFU_DNLOAD: 424 f_dfu->dfu_state = DFU_STATE_dfuDNLOAD_SYNC; 425 f_dfu->blk_seq_num = w_value; 426 value = handle_dnload(gadget, len); 427 break; 428 case USB_REQ_DFU_ABORT: 429 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 430 value = RET_ZLP; 431 break; 432 case USB_REQ_DFU_GETSTATUS: 433 handle_getstatus(req); 434 value = RET_STAT_LEN; 435 break; 436 case USB_REQ_DFU_GETSTATE: 437 handle_getstate(req); 438 break; 439 default: 440 f_dfu->dfu_state = DFU_STATE_dfuERROR; 441 value = RET_STALL; 442 break; 443 } 444 445 return value; 446 } 447 448 static int state_dfu_manifest_sync(struct f_dfu *f_dfu, 449 const struct usb_ctrlrequest *ctrl, 450 struct usb_gadget *gadget, 451 struct usb_request *req) 452 { 453 int value = 0; 454 455 switch (ctrl->bRequest) { 456 case USB_REQ_DFU_GETSTATUS: 457 /* We're MainfestationTolerant */ 458 f_dfu->dfu_state = DFU_STATE_dfuMANIFEST; 459 handle_getstatus(req); 460 f_dfu->blk_seq_num = 0; 461 value = RET_STAT_LEN; 462 req->complete = dnload_request_flush; 463 break; 464 case USB_REQ_DFU_GETSTATE: 465 handle_getstate(req); 466 break; 467 default: 468 f_dfu->dfu_state = DFU_STATE_dfuERROR; 469 value = RET_STALL; 470 break; 471 } 472 473 return value; 474 } 475 476 static int state_dfu_manifest(struct f_dfu *f_dfu, 477 const struct usb_ctrlrequest *ctrl, 478 struct usb_gadget *gadget, 479 struct usb_request *req) 480 { 481 int value = 0; 482 483 switch (ctrl->bRequest) { 484 case USB_REQ_DFU_GETSTATUS: 485 /* We're MainfestationTolerant */ 486 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 487 handle_getstatus(req); 488 f_dfu->blk_seq_num = 0; 489 value = RET_STAT_LEN; 490 puts("DOWNLOAD ... OK\nCtrl+C to exit ...\n"); 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 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 handle_getstatus(req); 527 value = RET_STAT_LEN; 528 break; 529 case USB_REQ_DFU_GETSTATE: 530 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 handle_getstatus(req); 551 value = RET_STAT_LEN; 552 break; 553 case USB_REQ_DFU_GETSTATE: 554 handle_getstate(req); 555 break; 556 case USB_REQ_DFU_CLRSTATUS: 557 f_dfu->dfu_state = DFU_STATE_dfuIDLE; 558 f_dfu->dfu_status = DFU_STATUS_OK; 559 /* no zlp? */ 560 value = RET_ZLP; 561 break; 562 default: 563 f_dfu->dfu_state = DFU_STATE_dfuERROR; 564 value = RET_STALL; 565 break; 566 } 567 568 return value; 569 } 570 571 static dfu_state_fn dfu_state[] = { 572 state_app_idle, /* DFU_STATE_appIDLE */ 573 state_app_detach, /* DFU_STATE_appDETACH */ 574 state_dfu_idle, /* DFU_STATE_dfuIDLE */ 575 state_dfu_dnload_sync, /* DFU_STATE_dfuDNLOAD_SYNC */ 576 state_dfu_dnbusy, /* DFU_STATE_dfuDNBUSY */ 577 state_dfu_dnload_idle, /* DFU_STATE_dfuDNLOAD_IDLE */ 578 state_dfu_manifest_sync, /* DFU_STATE_dfuMANIFEST_SYNC */ 579 state_dfu_manifest, /* DFU_STATE_dfuMANIFEST */ 580 NULL, /* DFU_STATE_dfuMANIFEST_WAIT_RST */ 581 state_dfu_upload_idle, /* DFU_STATE_dfuUPLOAD_IDLE */ 582 state_dfu_error /* DFU_STATE_dfuERROR */ 583 }; 584 585 static int 586 dfu_handle(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 587 { 588 struct usb_gadget *gadget = f->config->cdev->gadget; 589 struct usb_request *req = f->config->cdev->req; 590 struct f_dfu *f_dfu = f->config->cdev->req->context; 591 u16 len = le16_to_cpu(ctrl->wLength); 592 u16 w_value = le16_to_cpu(ctrl->wValue); 593 int value = 0; 594 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 595 596 debug("w_value: 0x%x len: 0x%x\n", w_value, len); 597 debug("req_type: 0x%x ctrl->bRequest: 0x%x f_dfu->dfu_state: 0x%x\n", 598 req_type, ctrl->bRequest, f_dfu->dfu_state); 599 600 if (req_type == USB_TYPE_STANDARD) { 601 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR && 602 (w_value >> 8) == DFU_DT_FUNC) { 603 value = min(len, (u16) sizeof(dfu_func)); 604 memcpy(req->buf, &dfu_func, value); 605 } 606 } else /* DFU specific request */ 607 value = dfu_state[f_dfu->dfu_state] (f_dfu, ctrl, gadget, req); 608 609 if (value >= 0) { 610 req->length = value; 611 req->zero = value < len; 612 value = usb_ep_queue(gadget->ep0, req, 0); 613 if (value < 0) { 614 debug("ep_queue --> %d\n", value); 615 req->status = 0; 616 } 617 } 618 619 return value; 620 } 621 622 /*-------------------------------------------------------------------------*/ 623 624 static int 625 dfu_prepare_strings(struct f_dfu *f_dfu, int n) 626 { 627 struct dfu_entity *de = NULL; 628 int i = 0; 629 630 f_dfu->strings = calloc(sizeof(struct usb_string), n + 1); 631 if (!f_dfu->strings) 632 goto enomem; 633 634 for (i = 0; i < n; ++i) { 635 de = dfu_get_entity(i); 636 f_dfu->strings[i].s = de->name; 637 } 638 639 f_dfu->strings[i].id = 0; 640 f_dfu->strings[i].s = NULL; 641 642 return 0; 643 644 enomem: 645 while (i) 646 f_dfu->strings[--i].s = NULL; 647 648 free(f_dfu->strings); 649 650 return -ENOMEM; 651 } 652 653 static int dfu_prepare_function(struct f_dfu *f_dfu, int n) 654 { 655 struct usb_interface_descriptor *d; 656 int i = 0; 657 658 f_dfu->function = calloc(sizeof(struct usb_descriptor_header *), n + 1); 659 if (!f_dfu->function) 660 goto enomem; 661 662 for (i = 0; i < n; ++i) { 663 d = calloc(sizeof(*d), 1); 664 if (!d) 665 goto enomem; 666 667 d->bLength = sizeof(*d); 668 d->bDescriptorType = USB_DT_INTERFACE; 669 d->bAlternateSetting = i; 670 d->bNumEndpoints = 0; 671 d->bInterfaceClass = USB_CLASS_APP_SPEC; 672 d->bInterfaceSubClass = 1; 673 d->bInterfaceProtocol = 2; 674 675 f_dfu->function[i] = (struct usb_descriptor_header *)d; 676 } 677 f_dfu->function[i] = NULL; 678 679 return 0; 680 681 enomem: 682 while (i) { 683 free(f_dfu->function[--i]); 684 f_dfu->function[i] = NULL; 685 } 686 free(f_dfu->function); 687 688 return -ENOMEM; 689 } 690 691 static int dfu_bind(struct usb_configuration *c, struct usb_function *f) 692 { 693 struct usb_composite_dev *cdev = c->cdev; 694 struct f_dfu *f_dfu = func_to_dfu(f); 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 error: 729 return rv; 730 } 731 732 static void dfu_unbind(struct usb_configuration *c, struct usb_function *f) 733 { 734 struct f_dfu *f_dfu = func_to_dfu(f); 735 int alt_num = dfu_get_alt_number(); 736 int i; 737 738 if (f_dfu->strings) { 739 i = alt_num; 740 while (i) 741 f_dfu->strings[--i].s = NULL; 742 743 free(f_dfu->strings); 744 } 745 746 if (f_dfu->function) { 747 i = alt_num; 748 while (i) { 749 free(f_dfu->function[--i]); 750 f_dfu->function[i] = NULL; 751 } 752 free(f_dfu->function); 753 } 754 755 free(f_dfu); 756 } 757 758 static int dfu_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 759 { 760 struct f_dfu *f_dfu = func_to_dfu(f); 761 762 debug("%s: intf:%d alt:%d\n", __func__, intf, alt); 763 764 f_dfu->altsetting = alt; 765 766 return 0; 767 } 768 769 /* TODO: is this really what we need here? */ 770 static void dfu_disable(struct usb_function *f) 771 { 772 struct f_dfu *f_dfu = func_to_dfu(f); 773 if (f_dfu->config == 0) 774 return; 775 776 debug("%s: reset config\n", __func__); 777 778 f_dfu->config = 0; 779 } 780 781 static int dfu_bind_config(struct usb_configuration *c) 782 { 783 struct f_dfu *f_dfu; 784 int status; 785 786 f_dfu = calloc(sizeof(*f_dfu), 1); 787 if (!f_dfu) 788 return -ENOMEM; 789 f_dfu->usb_function.name = "dfu"; 790 f_dfu->usb_function.hs_descriptors = dfu_runtime_descs; 791 f_dfu->usb_function.bind = dfu_bind; 792 f_dfu->usb_function.unbind = dfu_unbind; 793 f_dfu->usb_function.set_alt = dfu_set_alt; 794 f_dfu->usb_function.disable = dfu_disable; 795 f_dfu->usb_function.strings = dfu_generic_strings; 796 f_dfu->usb_function.setup = dfu_handle; 797 f_dfu->poll_timeout = DFU_DEFAULT_POLL_TIMEOUT; 798 799 status = usb_add_function(c, &f_dfu->usb_function); 800 if (status) 801 free(f_dfu); 802 803 return status; 804 } 805 806 int dfu_add(struct usb_configuration *c) 807 { 808 int id; 809 810 id = usb_string_id(c->cdev); 811 if (id < 0) 812 return id; 813 strings_dfu_generic[0].id = id; 814 dfu_intf_runtime.iInterface = id; 815 816 debug("%s: cdev: 0x%p gadget:0x%p gadget->ep0: 0x%p\n", __func__, 817 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 818 819 return dfu_bind_config(c); 820 } 821 822 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_dfu, dfu_add); 823