1 /* 2 * f_sdp.c -- USB HID Serial Download Protocol 3 * 4 * Copyright (C) 2017 Toradex 5 * Author: Stefan Agner <stefan.agner@toradex.com> 6 * 7 * This file implements the Serial Download Protocol (SDP) as specified in 8 * the i.MX 6 Reference Manual. The SDP is a USB HID based protocol and 9 * allows to download images directly to memory. The implementation 10 * works with the imx_loader (imx_usb) USB client software on host side. 11 * 12 * Not all commands are implemented, e.g. WRITE_REGISTER, DCD_WRITE and 13 * SKIP_DCD_HEADER are only stubs. 14 * 15 * Parts of the implementation are based on f_dfu and f_thor. 16 * 17 * SPDX-License-Identifier: GPL-2.0+ 18 */ 19 20 #include <errno.h> 21 #include <common.h> 22 #include <console.h> 23 #include <malloc.h> 24 25 #include <linux/usb/ch9.h> 26 #include <linux/usb/gadget.h> 27 #include <linux/usb/composite.h> 28 29 #include <asm/io.h> 30 #include <g_dnl.h> 31 #include <sdp.h> 32 #include <imximage.h> 33 34 #define HID_REPORT_ID_MASK 0x000000ff 35 36 /* 37 * HID class requests 38 */ 39 #define HID_REQ_GET_REPORT 0x01 40 #define HID_REQ_GET_IDLE 0x02 41 #define HID_REQ_GET_PROTOCOL 0x03 42 #define HID_REQ_SET_REPORT 0x09 43 #define HID_REQ_SET_IDLE 0x0A 44 #define HID_REQ_SET_PROTOCOL 0x0B 45 46 #define HID_USAGE_PAGE_LEN 76 47 48 struct hid_report { 49 u8 usage_page[HID_USAGE_PAGE_LEN]; 50 } __packed; 51 52 #define SDP_READ_REGISTER 0x0101 53 #define SDP_WRITE_REGISTER 0x0202 54 #define SDP_WRITE_FILE 0x0404 55 #define SDP_ERROR_STATUS 0x0505 56 #define SDP_DCD_WRITE 0x0a0a 57 #define SDP_JUMP_ADDRESS 0x0b0b 58 #define SDP_SKIP_DCD_HEADER 0x0c0c 59 60 #define SDP_SECURITY_CLOSED 0x12343412 61 #define SDP_SECURITY_OPEN 0x56787856 62 63 #define SDP_WRITE_FILE_COMPLETE 0x88888888 64 #define SDP_WRITE_REGISTER_COMPLETE 0x128A8A12 65 #define SDP_SKIP_DCD_HEADER_COMPLETE 0x900DD009 66 #define SDP_ERROR_IMXHEADER 0x000a0533 67 68 #define SDP_COMMAND_LEN 16 69 70 struct sdp_command { 71 u16 cmd; 72 u32 addr; 73 u8 format; 74 u32 cnt; 75 u32 data; 76 u8 rsvd; 77 } __packed; 78 79 enum sdp_state { 80 SDP_STATE_IDLE, 81 SDP_STATE_RX_DCD_DATA, 82 SDP_STATE_RX_FILE_DATA, 83 SDP_STATE_TX_SEC_CONF, 84 SDP_STATE_TX_SEC_CONF_BUSY, 85 SDP_STATE_TX_REGISTER, 86 SDP_STATE_TX_REGISTER_BUSY, 87 SDP_STATE_TX_STATUS, 88 SDP_STATE_TX_STATUS_BUSY, 89 SDP_STATE_JUMP, 90 }; 91 92 struct f_sdp { 93 struct usb_function usb_function; 94 95 struct usb_descriptor_header **function; 96 97 u8 altsetting; 98 enum sdp_state state; 99 enum sdp_state next_state; 100 u32 dnl_address; 101 u32 dnl_bytes_remaining; 102 u32 jmp_address; 103 bool always_send_status; 104 u32 error_status; 105 106 /* EP0 request */ 107 struct usb_request *req; 108 109 /* EP1 IN */ 110 struct usb_ep *in_ep; 111 struct usb_request *in_req; 112 113 bool configuration_done; 114 }; 115 116 static struct f_sdp *sdp_func; 117 118 static inline struct f_sdp *func_to_sdp(struct usb_function *f) 119 { 120 return container_of(f, struct f_sdp, usb_function); 121 } 122 123 static struct usb_interface_descriptor sdp_intf_runtime = { 124 .bLength = sizeof(sdp_intf_runtime), 125 .bDescriptorType = USB_DT_INTERFACE, 126 .bAlternateSetting = 0, 127 .bNumEndpoints = 1, 128 .bInterfaceClass = USB_CLASS_HID, 129 .bInterfaceSubClass = 0, 130 .bInterfaceProtocol = 0, 131 /* .iInterface = DYNAMIC */ 132 }; 133 134 /* HID configuration */ 135 static struct usb_class_hid_descriptor sdp_hid_desc = { 136 .bLength = sizeof(sdp_hid_desc), 137 .bDescriptorType = USB_DT_CS_DEVICE, 138 139 .bcdCDC = __constant_cpu_to_le16(0x0110), 140 .bCountryCode = 0, 141 .bNumDescriptors = 1, 142 143 .bDescriptorType0 = USB_DT_HID_REPORT, 144 .wDescriptorLength0 = HID_USAGE_PAGE_LEN, 145 }; 146 147 static struct usb_endpoint_descriptor in_desc = { 148 .bLength = USB_DT_ENDPOINT_SIZE, 149 .bDescriptorType = USB_DT_ENDPOINT, /*USB_DT_CS_ENDPOINT*/ 150 151 .bEndpointAddress = 1 | USB_DIR_IN, 152 .bmAttributes = USB_ENDPOINT_XFER_INT, 153 .wMaxPacketSize = 64, 154 .bInterval = 1, 155 }; 156 157 static struct usb_descriptor_header *sdp_runtime_descs[] = { 158 (struct usb_descriptor_header *)&sdp_intf_runtime, 159 (struct usb_descriptor_header *)&sdp_hid_desc, 160 (struct usb_descriptor_header *)&in_desc, 161 NULL, 162 }; 163 164 /* This is synchronized with what the SoC implementation reports */ 165 static struct hid_report sdp_hid_report = { 166 .usage_page = { 167 0x06, 0x00, 0xff, /* Usage Page */ 168 0x09, 0x01, /* Usage (Pointer?) */ 169 0xa1, 0x01, /* Collection */ 170 171 0x85, 0x01, /* Report ID */ 172 0x19, 0x01, /* Usage Minimum */ 173 0x29, 0x01, /* Usage Maximum */ 174 0x15, 0x00, /* Local Minimum */ 175 0x26, 0xFF, 0x00, /* Local Maximum? */ 176 0x75, 0x08, /* Report Size */ 177 0x95, 0x10, /* Report Count */ 178 0x91, 0x02, /* Output Data */ 179 180 0x85, 0x02, /* Report ID */ 181 0x19, 0x01, /* Usage Minimum */ 182 0x29, 0x01, /* Usage Maximum */ 183 0x15, 0x00, /* Local Minimum */ 184 0x26, 0xFF, 0x00, /* Local Maximum? */ 185 0x75, 0x80, /* Report Size 128 */ 186 0x95, 0x40, /* Report Count */ 187 0x91, 0x02, /* Output Data */ 188 189 0x85, 0x03, /* Report ID */ 190 0x19, 0x01, /* Usage Minimum */ 191 0x29, 0x01, /* Usage Maximum */ 192 0x15, 0x00, /* Local Minimum */ 193 0x26, 0xFF, 0x00, /* Local Maximum? */ 194 0x75, 0x08, /* Report Size 8 */ 195 0x95, 0x04, /* Report Count */ 196 0x81, 0x02, /* Input Data */ 197 198 0x85, 0x04, /* Report ID */ 199 0x19, 0x01, /* Usage Minimum */ 200 0x29, 0x01, /* Usage Maximum */ 201 0x15, 0x00, /* Local Minimum */ 202 0x26, 0xFF, 0x00, /* Local Maximum? */ 203 0x75, 0x08, /* Report Size 8 */ 204 0x95, 0x40, /* Report Count */ 205 0x81, 0x02, /* Input Data */ 206 0xc0 207 }, 208 }; 209 210 static const char sdp_name[] = "Serial Downloader Protocol"; 211 212 /* 213 * static strings, in UTF-8 214 */ 215 static struct usb_string strings_sdp_generic[] = { 216 [0].s = sdp_name, 217 { } /* end of list */ 218 }; 219 220 static struct usb_gadget_strings stringtab_sdp_generic = { 221 .language = 0x0409, /* en-us */ 222 .strings = strings_sdp_generic, 223 }; 224 225 static struct usb_gadget_strings *sdp_generic_strings[] = { 226 &stringtab_sdp_generic, 227 NULL, 228 }; 229 230 static void sdp_rx_command_complete(struct usb_ep *ep, struct usb_request *req) 231 { 232 struct f_sdp *sdp = req->context; 233 int status = req->status; 234 u8 *data = req->buf; 235 u8 report = data[0]; 236 237 if (status != 0) { 238 error("Status: %d", status); 239 return; 240 } 241 242 if (report != 1) { 243 error("Unexpected report %d", report); 244 return; 245 } 246 247 struct sdp_command *cmd = req->buf + 1; 248 249 debug("%s: command: %04x, addr: %08x, cnt: %u\n", 250 __func__, be16_to_cpu(cmd->cmd), 251 be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt)); 252 253 switch (be16_to_cpu(cmd->cmd)) { 254 case SDP_READ_REGISTER: 255 sdp->always_send_status = false; 256 sdp->error_status = 0x0; 257 258 sdp->state = SDP_STATE_TX_SEC_CONF; 259 sdp->dnl_address = be32_to_cpu(cmd->addr); 260 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 261 sdp->next_state = SDP_STATE_TX_REGISTER; 262 printf("Reading %d registers at 0x%08x... ", 263 sdp->dnl_bytes_remaining, sdp->dnl_address); 264 break; 265 case SDP_WRITE_FILE: 266 sdp->always_send_status = true; 267 sdp->error_status = SDP_WRITE_FILE_COMPLETE; 268 269 sdp->state = SDP_STATE_RX_FILE_DATA; 270 sdp->dnl_address = be32_to_cpu(cmd->addr); 271 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 272 sdp->next_state = SDP_STATE_IDLE; 273 274 printf("Downloading file of size %d to 0x%08x... ", 275 sdp->dnl_bytes_remaining, sdp->dnl_address); 276 277 break; 278 case SDP_ERROR_STATUS: 279 sdp->always_send_status = true; 280 sdp->error_status = 0; 281 282 sdp->state = SDP_STATE_TX_SEC_CONF; 283 sdp->next_state = SDP_STATE_IDLE; 284 break; 285 case SDP_DCD_WRITE: 286 sdp->always_send_status = true; 287 sdp->error_status = SDP_WRITE_REGISTER_COMPLETE; 288 289 sdp->state = SDP_STATE_RX_DCD_DATA; 290 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 291 sdp->next_state = SDP_STATE_IDLE; 292 break; 293 case SDP_JUMP_ADDRESS: 294 sdp->always_send_status = false; 295 sdp->error_status = 0; 296 297 sdp->jmp_address = be32_to_cpu(cmd->addr); 298 sdp->state = SDP_STATE_TX_SEC_CONF; 299 sdp->next_state = SDP_STATE_JUMP; 300 break; 301 case SDP_SKIP_DCD_HEADER: 302 sdp->always_send_status = true; 303 sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE; 304 305 /* Ignore command, DCD not supported anyway */ 306 sdp->state = SDP_STATE_TX_SEC_CONF; 307 sdp->next_state = SDP_STATE_IDLE; 308 break; 309 default: 310 error("Unknown command: %04x\n", be16_to_cpu(cmd->cmd)); 311 } 312 } 313 314 static void sdp_rx_data_complete(struct usb_ep *ep, struct usb_request *req) 315 { 316 struct f_sdp *sdp = req->context; 317 int status = req->status; 318 u8 *data = req->buf; 319 u8 report = data[0]; 320 int datalen = req->length - 1; 321 322 if (status != 0) { 323 error("Status: %d", status); 324 return; 325 } 326 327 if (report != 2) { 328 error("Unexpected report %d", report); 329 return; 330 } 331 332 if (sdp->dnl_bytes_remaining < datalen) { 333 /* 334 * Some USB stacks require to send a complete buffer as 335 * specified in the HID descriptor. This leads to longer 336 * transfers than the file length, no problem for us. 337 */ 338 sdp->dnl_bytes_remaining = 0; 339 } else { 340 sdp->dnl_bytes_remaining -= datalen; 341 } 342 343 if (sdp->state == SDP_STATE_RX_FILE_DATA) { 344 memcpy((void *)sdp->dnl_address, req->buf + 1, datalen); 345 sdp->dnl_address += datalen; 346 } 347 348 if (sdp->dnl_bytes_remaining) 349 return; 350 351 printf("done\n"); 352 353 switch (sdp->state) { 354 case SDP_STATE_RX_FILE_DATA: 355 sdp->state = SDP_STATE_TX_SEC_CONF; 356 break; 357 case SDP_STATE_RX_DCD_DATA: 358 sdp->state = SDP_STATE_TX_SEC_CONF; 359 break; 360 default: 361 error("Invalid state: %d", sdp->state); 362 } 363 } 364 365 static void sdp_tx_complete(struct usb_ep *ep, struct usb_request *req) 366 { 367 struct f_sdp *sdp = req->context; 368 int status = req->status; 369 370 if (status != 0) { 371 error("Status: %d", status); 372 return; 373 } 374 375 switch (sdp->state) { 376 case SDP_STATE_TX_SEC_CONF_BUSY: 377 /* Not all commands require status report */ 378 if (sdp->always_send_status || sdp->error_status) 379 sdp->state = SDP_STATE_TX_STATUS; 380 else 381 sdp->state = sdp->next_state; 382 383 break; 384 case SDP_STATE_TX_STATUS_BUSY: 385 sdp->state = sdp->next_state; 386 break; 387 case SDP_STATE_TX_REGISTER_BUSY: 388 if (sdp->dnl_bytes_remaining) 389 sdp->state = SDP_STATE_TX_REGISTER; 390 else 391 sdp->state = SDP_STATE_IDLE; 392 break; 393 default: 394 error("Wrong State: %d", sdp->state); 395 sdp->state = SDP_STATE_IDLE; 396 break; 397 } 398 debug("%s complete --> %d, %d/%d\n", ep->name, 399 status, req->actual, req->length); 400 } 401 402 static int sdp_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 403 { 404 struct usb_gadget *gadget = f->config->cdev->gadget; 405 struct usb_request *req = f->config->cdev->req; 406 struct f_sdp *sdp = f->config->cdev->req->context; 407 u16 len = le16_to_cpu(ctrl->wLength); 408 u16 w_value = le16_to_cpu(ctrl->wValue); 409 int value = 0; 410 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 411 412 debug("w_value: 0x%04x len: 0x%04x\n", w_value, len); 413 debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n", 414 req_type, ctrl->bRequest, sdp->state); 415 416 if (req_type == USB_TYPE_STANDARD) { 417 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) { 418 /* Send HID report descriptor */ 419 value = min(len, (u16) sizeof(sdp_hid_report)); 420 memcpy(req->buf, &sdp_hid_report, value); 421 sdp->configuration_done = true; 422 } 423 } 424 425 if (req_type == USB_TYPE_CLASS) { 426 int report = w_value & HID_REPORT_ID_MASK; 427 428 /* HID (SDP) request */ 429 switch (ctrl->bRequest) { 430 case HID_REQ_SET_REPORT: 431 switch (report) { 432 case 1: 433 value = SDP_COMMAND_LEN + 1; 434 req->complete = sdp_rx_command_complete; 435 break; 436 case 2: 437 value = len; 438 req->complete = sdp_rx_data_complete; 439 break; 440 } 441 } 442 } 443 444 if (value >= 0) { 445 req->length = value; 446 req->zero = value < len; 447 value = usb_ep_queue(gadget->ep0, req, 0); 448 if (value < 0) { 449 debug("ep_queue --> %d\n", value); 450 req->status = 0; 451 } 452 } 453 454 return value; 455 } 456 457 static int sdp_bind(struct usb_configuration *c, struct usb_function *f) 458 { 459 struct usb_gadget *gadget = c->cdev->gadget; 460 struct usb_composite_dev *cdev = c->cdev; 461 struct f_sdp *sdp = func_to_sdp(f); 462 int rv = 0, id; 463 464 id = usb_interface_id(c, f); 465 if (id < 0) 466 return id; 467 sdp_intf_runtime.bInterfaceNumber = id; 468 469 struct usb_ep *ep; 470 471 /* allocate instance-specific endpoints */ 472 ep = usb_ep_autoconfig(gadget, &in_desc); 473 if (!ep) { 474 rv = -ENODEV; 475 goto error; 476 } 477 478 sdp->in_ep = ep; /* Store IN EP for enabling @ setup */ 479 480 cdev->req->context = sdp; 481 482 error: 483 return rv; 484 } 485 486 static void sdp_unbind(struct usb_configuration *c, struct usb_function *f) 487 { 488 free(sdp_func); 489 sdp_func = NULL; 490 } 491 492 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 493 { 494 struct usb_request *req; 495 496 req = usb_ep_alloc_request(ep, 0); 497 if (!req) 498 return req; 499 500 req->length = length; 501 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 502 if (!req->buf) { 503 usb_ep_free_request(ep, req); 504 req = NULL; 505 } 506 507 return req; 508 } 509 510 511 static struct usb_request *sdp_start_ep(struct usb_ep *ep) 512 { 513 struct usb_request *req; 514 515 req = alloc_ep_req(ep, 64); 516 debug("%s: ep:%p req:%p\n", __func__, ep, req); 517 518 if (!req) 519 return NULL; 520 521 memset(req->buf, 0, req->length); 522 req->complete = sdp_tx_complete; 523 524 return req; 525 } 526 static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 527 { 528 struct f_sdp *sdp = func_to_sdp(f); 529 struct usb_composite_dev *cdev = f->config->cdev; 530 int result; 531 532 debug("%s: intf: %d alt: %d\n", __func__, intf, alt); 533 534 result = usb_ep_enable(sdp->in_ep, &in_desc); 535 if (result) 536 return result; 537 sdp->in_req = sdp_start_ep(sdp->in_ep); 538 sdp->in_req->context = sdp; 539 540 sdp->in_ep->driver_data = cdev; /* claim */ 541 542 sdp->altsetting = alt; 543 sdp->state = SDP_STATE_IDLE; 544 545 return 0; 546 } 547 548 static int sdp_get_alt(struct usb_function *f, unsigned intf) 549 { 550 struct f_sdp *sdp = func_to_sdp(f); 551 552 return sdp->altsetting; 553 } 554 555 static void sdp_disable(struct usb_function *f) 556 { 557 struct f_sdp *sdp = func_to_sdp(f); 558 559 usb_ep_disable(sdp->in_ep); 560 561 if (sdp->in_req) { 562 free(sdp->in_req); 563 sdp->in_req = NULL; 564 } 565 } 566 567 static int sdp_bind_config(struct usb_configuration *c) 568 { 569 int status; 570 571 if (!sdp_func) { 572 sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func)); 573 if (!sdp_func) 574 return -ENOMEM; 575 } 576 577 memset(sdp_func, 0, sizeof(*sdp_func)); 578 579 sdp_func->usb_function.name = "sdp"; 580 sdp_func->usb_function.hs_descriptors = sdp_runtime_descs; 581 sdp_func->usb_function.descriptors = sdp_runtime_descs; 582 sdp_func->usb_function.bind = sdp_bind; 583 sdp_func->usb_function.unbind = sdp_unbind; 584 sdp_func->usb_function.set_alt = sdp_set_alt; 585 sdp_func->usb_function.get_alt = sdp_get_alt; 586 sdp_func->usb_function.disable = sdp_disable; 587 sdp_func->usb_function.strings = sdp_generic_strings; 588 sdp_func->usb_function.setup = sdp_setup; 589 590 status = usb_add_function(c, &sdp_func->usb_function); 591 592 return status; 593 } 594 595 int sdp_init(int controller_index) 596 { 597 printf("SDP: initialize...\n"); 598 while (!sdp_func->configuration_done) { 599 if (ctrlc()) { 600 puts("\rCTRL+C - Operation aborted.\n"); 601 return 1; 602 } 603 usb_gadget_handle_interrupts(controller_index); 604 } 605 606 return 0; 607 } 608 609 static u32 sdp_jump_imxheader(void *address) 610 { 611 flash_header_v2_t *headerv2 = address; 612 ulong (*entry)(void); 613 614 if (headerv2->header.tag != IVT_HEADER_TAG) { 615 printf("Header Tag is not an IMX image\n"); 616 return SDP_ERROR_IMXHEADER; 617 } 618 619 printf("Jumping to 0x%08x\n", headerv2->entry); 620 entry = (void *)headerv2->entry; 621 entry(); 622 623 /* The image probably never returns hence we won't reach that point */ 624 return 0; 625 } 626 627 static void sdp_handle_in_ep(void) 628 { 629 u8 *data = sdp_func->in_req->buf; 630 u32 status; 631 int datalen; 632 633 switch (sdp_func->state) { 634 case SDP_STATE_TX_SEC_CONF: 635 debug("Report 3: HAB security\n"); 636 data[0] = 3; 637 638 status = SDP_SECURITY_OPEN; 639 memcpy(&data[1], &status, 4); 640 sdp_func->in_req->length = 5; 641 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 642 sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY; 643 break; 644 645 case SDP_STATE_TX_STATUS: 646 debug("Report 4: Status\n"); 647 data[0] = 4; 648 649 memcpy(&data[1], &sdp_func->error_status, 4); 650 sdp_func->in_req->length = 65; 651 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 652 sdp_func->state = SDP_STATE_TX_STATUS_BUSY; 653 break; 654 case SDP_STATE_TX_REGISTER: 655 debug("Report 4: Register Values\n"); 656 data[0] = 4; 657 658 datalen = sdp_func->dnl_bytes_remaining; 659 660 if (datalen > 64) 661 datalen = 64; 662 663 memcpy(&data[1], (void *)sdp_func->dnl_address, datalen); 664 sdp_func->in_req->length = 65; 665 666 sdp_func->dnl_bytes_remaining -= datalen; 667 sdp_func->dnl_address += datalen; 668 669 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 670 sdp_func->state = SDP_STATE_TX_REGISTER_BUSY; 671 break; 672 case SDP_STATE_JUMP: 673 printf("Checking imxheader at 0x%08x\n", f_sdp->jmp_address); 674 status = sdp_jump_imxheader((void *)f_sdp->jmp_address); 675 676 sdp_func->next_state = SDP_STATE_IDLE; 677 sdp_func->error_status = status; 678 679 /* Only send Report 4 if there was an error */ 680 if (status) 681 sdp_func->state = SDP_STATE_TX_STATUS; 682 else 683 sdp_func->state = SDP_STATE_IDLE; 684 break; 685 default: 686 break; 687 }; 688 } 689 690 void sdp_handle(int controller_index) 691 { 692 printf("SDP: handle requests...\n"); 693 while (1) { 694 if (ctrlc()) { 695 puts("\rCTRL+C - Operation aborted.\n"); 696 return; 697 } 698 699 usb_gadget_handle_interrupts(controller_index); 700 701 sdp_handle_in_ep(); 702 } 703 } 704 705 int sdp_add(struct usb_configuration *c) 706 { 707 int id; 708 709 id = usb_string_id(c->cdev); 710 if (id < 0) 711 return id; 712 strings_sdp_generic[0].id = id; 713 sdp_intf_runtime.iInterface = id; 714 715 debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__, 716 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 717 718 return sdp_bind_config(c); 719 } 720 721 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add); 722