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 <spl.h> 33 #include <image.h> 34 #include <imximage.h> 35 36 #define HID_REPORT_ID_MASK 0x000000ff 37 38 /* 39 * HID class requests 40 */ 41 #define HID_REQ_GET_REPORT 0x01 42 #define HID_REQ_GET_IDLE 0x02 43 #define HID_REQ_GET_PROTOCOL 0x03 44 #define HID_REQ_SET_REPORT 0x09 45 #define HID_REQ_SET_IDLE 0x0A 46 #define HID_REQ_SET_PROTOCOL 0x0B 47 48 #define HID_USAGE_PAGE_LEN 76 49 50 struct hid_report { 51 u8 usage_page[HID_USAGE_PAGE_LEN]; 52 } __packed; 53 54 #define SDP_READ_REGISTER 0x0101 55 #define SDP_WRITE_REGISTER 0x0202 56 #define SDP_WRITE_FILE 0x0404 57 #define SDP_ERROR_STATUS 0x0505 58 #define SDP_DCD_WRITE 0x0a0a 59 #define SDP_JUMP_ADDRESS 0x0b0b 60 #define SDP_SKIP_DCD_HEADER 0x0c0c 61 62 #define SDP_SECURITY_CLOSED 0x12343412 63 #define SDP_SECURITY_OPEN 0x56787856 64 65 #define SDP_WRITE_FILE_COMPLETE 0x88888888 66 #define SDP_WRITE_REGISTER_COMPLETE 0x128A8A12 67 #define SDP_SKIP_DCD_HEADER_COMPLETE 0x900DD009 68 #define SDP_ERROR_IMXHEADER 0x000a0533 69 70 #define SDP_COMMAND_LEN 16 71 72 struct sdp_command { 73 u16 cmd; 74 u32 addr; 75 u8 format; 76 u32 cnt; 77 u32 data; 78 u8 rsvd; 79 } __packed; 80 81 enum sdp_state { 82 SDP_STATE_IDLE, 83 SDP_STATE_RX_DCD_DATA, 84 SDP_STATE_RX_FILE_DATA, 85 SDP_STATE_TX_SEC_CONF, 86 SDP_STATE_TX_SEC_CONF_BUSY, 87 SDP_STATE_TX_REGISTER, 88 SDP_STATE_TX_REGISTER_BUSY, 89 SDP_STATE_TX_STATUS, 90 SDP_STATE_TX_STATUS_BUSY, 91 SDP_STATE_JUMP, 92 }; 93 94 struct f_sdp { 95 struct usb_function usb_function; 96 97 struct usb_descriptor_header **function; 98 99 u8 altsetting; 100 enum sdp_state state; 101 enum sdp_state next_state; 102 u32 dnl_address; 103 u32 dnl_bytes_remaining; 104 u32 jmp_address; 105 bool always_send_status; 106 u32 error_status; 107 108 /* EP0 request */ 109 struct usb_request *req; 110 111 /* EP1 IN */ 112 struct usb_ep *in_ep; 113 struct usb_request *in_req; 114 115 bool configuration_done; 116 }; 117 118 static struct f_sdp *sdp_func; 119 120 static inline struct f_sdp *func_to_sdp(struct usb_function *f) 121 { 122 return container_of(f, struct f_sdp, usb_function); 123 } 124 125 static struct usb_interface_descriptor sdp_intf_runtime = { 126 .bLength = sizeof(sdp_intf_runtime), 127 .bDescriptorType = USB_DT_INTERFACE, 128 .bAlternateSetting = 0, 129 .bNumEndpoints = 1, 130 .bInterfaceClass = USB_CLASS_HID, 131 .bInterfaceSubClass = 0, 132 .bInterfaceProtocol = 0, 133 /* .iInterface = DYNAMIC */ 134 }; 135 136 /* HID configuration */ 137 static struct usb_class_hid_descriptor sdp_hid_desc = { 138 .bLength = sizeof(sdp_hid_desc), 139 .bDescriptorType = USB_DT_CS_DEVICE, 140 141 .bcdCDC = __constant_cpu_to_le16(0x0110), 142 .bCountryCode = 0, 143 .bNumDescriptors = 1, 144 145 .bDescriptorType0 = USB_DT_HID_REPORT, 146 .wDescriptorLength0 = HID_USAGE_PAGE_LEN, 147 }; 148 149 static struct usb_endpoint_descriptor in_desc = { 150 .bLength = USB_DT_ENDPOINT_SIZE, 151 .bDescriptorType = USB_DT_ENDPOINT, /*USB_DT_CS_ENDPOINT*/ 152 153 .bEndpointAddress = 1 | USB_DIR_IN, 154 .bmAttributes = USB_ENDPOINT_XFER_INT, 155 .wMaxPacketSize = 64, 156 .bInterval = 1, 157 }; 158 159 static struct usb_descriptor_header *sdp_runtime_descs[] = { 160 (struct usb_descriptor_header *)&sdp_intf_runtime, 161 (struct usb_descriptor_header *)&sdp_hid_desc, 162 (struct usb_descriptor_header *)&in_desc, 163 NULL, 164 }; 165 166 /* This is synchronized with what the SoC implementation reports */ 167 static struct hid_report sdp_hid_report = { 168 .usage_page = { 169 0x06, 0x00, 0xff, /* Usage Page */ 170 0x09, 0x01, /* Usage (Pointer?) */ 171 0xa1, 0x01, /* Collection */ 172 173 0x85, 0x01, /* Report ID */ 174 0x19, 0x01, /* Usage Minimum */ 175 0x29, 0x01, /* Usage Maximum */ 176 0x15, 0x00, /* Local Minimum */ 177 0x26, 0xFF, 0x00, /* Local Maximum? */ 178 0x75, 0x08, /* Report Size */ 179 0x95, 0x10, /* Report Count */ 180 0x91, 0x02, /* Output Data */ 181 182 0x85, 0x02, /* Report ID */ 183 0x19, 0x01, /* Usage Minimum */ 184 0x29, 0x01, /* Usage Maximum */ 185 0x15, 0x00, /* Local Minimum */ 186 0x26, 0xFF, 0x00, /* Local Maximum? */ 187 0x75, 0x80, /* Report Size 128 */ 188 0x95, 0x40, /* Report Count */ 189 0x91, 0x02, /* Output Data */ 190 191 0x85, 0x03, /* Report ID */ 192 0x19, 0x01, /* Usage Minimum */ 193 0x29, 0x01, /* Usage Maximum */ 194 0x15, 0x00, /* Local Minimum */ 195 0x26, 0xFF, 0x00, /* Local Maximum? */ 196 0x75, 0x08, /* Report Size 8 */ 197 0x95, 0x04, /* Report Count */ 198 0x81, 0x02, /* Input Data */ 199 200 0x85, 0x04, /* Report ID */ 201 0x19, 0x01, /* Usage Minimum */ 202 0x29, 0x01, /* Usage Maximum */ 203 0x15, 0x00, /* Local Minimum */ 204 0x26, 0xFF, 0x00, /* Local Maximum? */ 205 0x75, 0x08, /* Report Size 8 */ 206 0x95, 0x40, /* Report Count */ 207 0x81, 0x02, /* Input Data */ 208 0xc0 209 }, 210 }; 211 212 static const char sdp_name[] = "Serial Downloader Protocol"; 213 214 /* 215 * static strings, in UTF-8 216 */ 217 static struct usb_string strings_sdp_generic[] = { 218 [0].s = sdp_name, 219 { } /* end of list */ 220 }; 221 222 static struct usb_gadget_strings stringtab_sdp_generic = { 223 .language = 0x0409, /* en-us */ 224 .strings = strings_sdp_generic, 225 }; 226 227 static struct usb_gadget_strings *sdp_generic_strings[] = { 228 &stringtab_sdp_generic, 229 NULL, 230 }; 231 232 static void sdp_rx_command_complete(struct usb_ep *ep, struct usb_request *req) 233 { 234 struct f_sdp *sdp = req->context; 235 int status = req->status; 236 u8 *data = req->buf; 237 u8 report = data[0]; 238 239 if (status != 0) { 240 pr_err("Status: %d", status); 241 return; 242 } 243 244 if (report != 1) { 245 pr_err("Unexpected report %d", report); 246 return; 247 } 248 249 struct sdp_command *cmd = req->buf + 1; 250 251 debug("%s: command: %04x, addr: %08x, cnt: %u\n", 252 __func__, be16_to_cpu(cmd->cmd), 253 be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt)); 254 255 switch (be16_to_cpu(cmd->cmd)) { 256 case SDP_READ_REGISTER: 257 sdp->always_send_status = false; 258 sdp->error_status = 0x0; 259 260 sdp->state = SDP_STATE_TX_SEC_CONF; 261 sdp->dnl_address = be32_to_cpu(cmd->addr); 262 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 263 sdp->next_state = SDP_STATE_TX_REGISTER; 264 printf("Reading %d registers at 0x%08x... ", 265 sdp->dnl_bytes_remaining, sdp->dnl_address); 266 break; 267 case SDP_WRITE_FILE: 268 sdp->always_send_status = true; 269 sdp->error_status = SDP_WRITE_FILE_COMPLETE; 270 271 sdp->state = SDP_STATE_RX_FILE_DATA; 272 sdp->dnl_address = be32_to_cpu(cmd->addr); 273 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 274 sdp->next_state = SDP_STATE_IDLE; 275 276 printf("Downloading file of size %d to 0x%08x... ", 277 sdp->dnl_bytes_remaining, sdp->dnl_address); 278 279 break; 280 case SDP_ERROR_STATUS: 281 sdp->always_send_status = true; 282 sdp->error_status = 0; 283 284 sdp->state = SDP_STATE_TX_SEC_CONF; 285 sdp->next_state = SDP_STATE_IDLE; 286 break; 287 case SDP_DCD_WRITE: 288 sdp->always_send_status = true; 289 sdp->error_status = SDP_WRITE_REGISTER_COMPLETE; 290 291 sdp->state = SDP_STATE_RX_DCD_DATA; 292 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 293 sdp->next_state = SDP_STATE_IDLE; 294 break; 295 case SDP_JUMP_ADDRESS: 296 sdp->always_send_status = false; 297 sdp->error_status = 0; 298 299 sdp->jmp_address = be32_to_cpu(cmd->addr); 300 sdp->state = SDP_STATE_TX_SEC_CONF; 301 sdp->next_state = SDP_STATE_JUMP; 302 break; 303 case SDP_SKIP_DCD_HEADER: 304 sdp->always_send_status = true; 305 sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE; 306 307 /* Ignore command, DCD not supported anyway */ 308 sdp->state = SDP_STATE_TX_SEC_CONF; 309 sdp->next_state = SDP_STATE_IDLE; 310 break; 311 default: 312 pr_err("Unknown command: %04x\n", be16_to_cpu(cmd->cmd)); 313 } 314 } 315 316 static void sdp_rx_data_complete(struct usb_ep *ep, struct usb_request *req) 317 { 318 struct f_sdp *sdp = req->context; 319 int status = req->status; 320 u8 *data = req->buf; 321 u8 report = data[0]; 322 int datalen = req->length - 1; 323 324 if (status != 0) { 325 pr_err("Status: %d", status); 326 return; 327 } 328 329 if (report != 2) { 330 pr_err("Unexpected report %d", report); 331 return; 332 } 333 334 if (sdp->dnl_bytes_remaining < datalen) { 335 /* 336 * Some USB stacks require to send a complete buffer as 337 * specified in the HID descriptor. This leads to longer 338 * transfers than the file length, no problem for us. 339 */ 340 sdp->dnl_bytes_remaining = 0; 341 } else { 342 sdp->dnl_bytes_remaining -= datalen; 343 } 344 345 if (sdp->state == SDP_STATE_RX_FILE_DATA) { 346 memcpy((void *)sdp->dnl_address, req->buf + 1, datalen); 347 sdp->dnl_address += datalen; 348 } 349 350 if (sdp->dnl_bytes_remaining) 351 return; 352 353 printf("done\n"); 354 355 switch (sdp->state) { 356 case SDP_STATE_RX_FILE_DATA: 357 sdp->state = SDP_STATE_TX_SEC_CONF; 358 break; 359 case SDP_STATE_RX_DCD_DATA: 360 sdp->state = SDP_STATE_TX_SEC_CONF; 361 break; 362 default: 363 pr_err("Invalid state: %d", sdp->state); 364 } 365 } 366 367 static void sdp_tx_complete(struct usb_ep *ep, struct usb_request *req) 368 { 369 struct f_sdp *sdp = req->context; 370 int status = req->status; 371 372 if (status != 0) { 373 pr_err("Status: %d", status); 374 return; 375 } 376 377 switch (sdp->state) { 378 case SDP_STATE_TX_SEC_CONF_BUSY: 379 /* Not all commands require status report */ 380 if (sdp->always_send_status || sdp->error_status) 381 sdp->state = SDP_STATE_TX_STATUS; 382 else 383 sdp->state = sdp->next_state; 384 385 break; 386 case SDP_STATE_TX_STATUS_BUSY: 387 sdp->state = sdp->next_state; 388 break; 389 case SDP_STATE_TX_REGISTER_BUSY: 390 if (sdp->dnl_bytes_remaining) 391 sdp->state = SDP_STATE_TX_REGISTER; 392 else 393 sdp->state = SDP_STATE_IDLE; 394 break; 395 default: 396 pr_err("Wrong State: %d", sdp->state); 397 sdp->state = SDP_STATE_IDLE; 398 break; 399 } 400 debug("%s complete --> %d, %d/%d\n", ep->name, 401 status, req->actual, req->length); 402 } 403 404 static int sdp_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 405 { 406 struct usb_gadget *gadget = f->config->cdev->gadget; 407 struct usb_request *req = f->config->cdev->req; 408 struct f_sdp *sdp = f->config->cdev->req->context; 409 u16 len = le16_to_cpu(ctrl->wLength); 410 u16 w_value = le16_to_cpu(ctrl->wValue); 411 int value = 0; 412 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 413 414 debug("w_value: 0x%04x len: 0x%04x\n", w_value, len); 415 debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n", 416 req_type, ctrl->bRequest, sdp->state); 417 418 if (req_type == USB_TYPE_STANDARD) { 419 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) { 420 /* Send HID report descriptor */ 421 value = min(len, (u16) sizeof(sdp_hid_report)); 422 memcpy(req->buf, &sdp_hid_report, value); 423 sdp->configuration_done = true; 424 } 425 } 426 427 if (req_type == USB_TYPE_CLASS) { 428 int report = w_value & HID_REPORT_ID_MASK; 429 430 /* HID (SDP) request */ 431 switch (ctrl->bRequest) { 432 case HID_REQ_SET_REPORT: 433 switch (report) { 434 case 1: 435 value = SDP_COMMAND_LEN + 1; 436 req->complete = sdp_rx_command_complete; 437 break; 438 case 2: 439 value = len; 440 req->complete = sdp_rx_data_complete; 441 break; 442 } 443 } 444 } 445 446 if (value >= 0) { 447 req->length = value; 448 req->zero = value < len; 449 value = usb_ep_queue(gadget->ep0, req, 0); 450 if (value < 0) { 451 debug("ep_queue --> %d\n", value); 452 req->status = 0; 453 } 454 } 455 456 return value; 457 } 458 459 static int sdp_bind(struct usb_configuration *c, struct usb_function *f) 460 { 461 struct usb_gadget *gadget = c->cdev->gadget; 462 struct usb_composite_dev *cdev = c->cdev; 463 struct f_sdp *sdp = func_to_sdp(f); 464 int rv = 0, id; 465 466 id = usb_interface_id(c, f); 467 if (id < 0) 468 return id; 469 sdp_intf_runtime.bInterfaceNumber = id; 470 471 struct usb_ep *ep; 472 473 /* allocate instance-specific endpoints */ 474 ep = usb_ep_autoconfig(gadget, &in_desc); 475 if (!ep) { 476 rv = -ENODEV; 477 goto error; 478 } 479 480 sdp->in_ep = ep; /* Store IN EP for enabling @ setup */ 481 482 cdev->req->context = sdp; 483 484 error: 485 return rv; 486 } 487 488 static void sdp_unbind(struct usb_configuration *c, struct usb_function *f) 489 { 490 free(sdp_func); 491 sdp_func = NULL; 492 } 493 494 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 495 { 496 struct usb_request *req; 497 498 req = usb_ep_alloc_request(ep, 0); 499 if (!req) 500 return req; 501 502 req->length = length; 503 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 504 if (!req->buf) { 505 usb_ep_free_request(ep, req); 506 req = NULL; 507 } 508 509 return req; 510 } 511 512 513 static struct usb_request *sdp_start_ep(struct usb_ep *ep) 514 { 515 struct usb_request *req; 516 517 req = alloc_ep_req(ep, 64); 518 debug("%s: ep:%p req:%p\n", __func__, ep, req); 519 520 if (!req) 521 return NULL; 522 523 memset(req->buf, 0, req->length); 524 req->complete = sdp_tx_complete; 525 526 return req; 527 } 528 static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 529 { 530 struct f_sdp *sdp = func_to_sdp(f); 531 struct usb_composite_dev *cdev = f->config->cdev; 532 int result; 533 534 debug("%s: intf: %d alt: %d\n", __func__, intf, alt); 535 536 result = usb_ep_enable(sdp->in_ep, &in_desc); 537 if (result) 538 return result; 539 sdp->in_req = sdp_start_ep(sdp->in_ep); 540 sdp->in_req->context = sdp; 541 542 sdp->in_ep->driver_data = cdev; /* claim */ 543 544 sdp->altsetting = alt; 545 sdp->state = SDP_STATE_IDLE; 546 547 return 0; 548 } 549 550 static int sdp_get_alt(struct usb_function *f, unsigned intf) 551 { 552 struct f_sdp *sdp = func_to_sdp(f); 553 554 return sdp->altsetting; 555 } 556 557 static void sdp_disable(struct usb_function *f) 558 { 559 struct f_sdp *sdp = func_to_sdp(f); 560 561 usb_ep_disable(sdp->in_ep); 562 563 if (sdp->in_req) { 564 free(sdp->in_req); 565 sdp->in_req = NULL; 566 } 567 } 568 569 static int sdp_bind_config(struct usb_configuration *c) 570 { 571 int status; 572 573 if (!sdp_func) { 574 sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func)); 575 if (!sdp_func) 576 return -ENOMEM; 577 } 578 579 memset(sdp_func, 0, sizeof(*sdp_func)); 580 581 sdp_func->usb_function.name = "sdp"; 582 sdp_func->usb_function.hs_descriptors = sdp_runtime_descs; 583 sdp_func->usb_function.descriptors = sdp_runtime_descs; 584 sdp_func->usb_function.bind = sdp_bind; 585 sdp_func->usb_function.unbind = sdp_unbind; 586 sdp_func->usb_function.set_alt = sdp_set_alt; 587 sdp_func->usb_function.get_alt = sdp_get_alt; 588 sdp_func->usb_function.disable = sdp_disable; 589 sdp_func->usb_function.strings = sdp_generic_strings; 590 sdp_func->usb_function.setup = sdp_setup; 591 592 status = usb_add_function(c, &sdp_func->usb_function); 593 594 return status; 595 } 596 597 int sdp_init(int controller_index) 598 { 599 printf("SDP: initialize...\n"); 600 while (!sdp_func->configuration_done) { 601 if (ctrlc()) { 602 puts("\rCTRL+C - Operation aborted.\n"); 603 return 1; 604 } 605 usb_gadget_handle_interrupts(controller_index); 606 } 607 608 return 0; 609 } 610 611 static u32 sdp_jump_imxheader(void *address) 612 { 613 flash_header_v2_t *headerv2 = address; 614 ulong (*entry)(void); 615 616 if (headerv2->header.tag != IVT_HEADER_TAG) { 617 printf("Header Tag is not an IMX image\n"); 618 return SDP_ERROR_IMXHEADER; 619 } 620 621 printf("Jumping to 0x%08x\n", headerv2->entry); 622 entry = (void *)headerv2->entry; 623 entry(); 624 625 /* The image probably never returns hence we won't reach that point */ 626 return 0; 627 } 628 629 static void sdp_handle_in_ep(void) 630 { 631 u8 *data = sdp_func->in_req->buf; 632 u32 status; 633 int datalen; 634 635 switch (sdp_func->state) { 636 case SDP_STATE_TX_SEC_CONF: 637 debug("Report 3: HAB security\n"); 638 data[0] = 3; 639 640 status = SDP_SECURITY_OPEN; 641 memcpy(&data[1], &status, 4); 642 sdp_func->in_req->length = 5; 643 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 644 sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY; 645 break; 646 647 case SDP_STATE_TX_STATUS: 648 debug("Report 4: Status\n"); 649 data[0] = 4; 650 651 memcpy(&data[1], &sdp_func->error_status, 4); 652 sdp_func->in_req->length = 65; 653 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 654 sdp_func->state = SDP_STATE_TX_STATUS_BUSY; 655 break; 656 case SDP_STATE_TX_REGISTER: 657 debug("Report 4: Register Values\n"); 658 data[0] = 4; 659 660 datalen = sdp_func->dnl_bytes_remaining; 661 662 if (datalen > 64) 663 datalen = 64; 664 665 memcpy(&data[1], (void *)sdp_func->dnl_address, datalen); 666 sdp_func->in_req->length = 65; 667 668 sdp_func->dnl_bytes_remaining -= datalen; 669 sdp_func->dnl_address += datalen; 670 671 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 672 sdp_func->state = SDP_STATE_TX_REGISTER_BUSY; 673 break; 674 case SDP_STATE_JUMP: 675 printf("Jumping to header at 0x%08x\n", sdp_func->jmp_address); 676 status = sdp_jump_imxheader((void *)sdp_func->jmp_address); 677 678 /* If imx header fails, try some U-Boot specific headers */ 679 if (status) { 680 #ifdef CONFIG_SPL_BUILD 681 /* In SPL, allow jumps to U-Boot images */ 682 struct spl_image_info spl_image = {}; 683 spl_parse_image_header(&spl_image, 684 (struct image_header *)sdp_func->jmp_address); 685 jump_to_image_no_args(&spl_image); 686 #else 687 /* In U-Boot, allow jumps to scripts */ 688 source(sdp_func->jmp_address, "script@1"); 689 #endif 690 } 691 692 sdp_func->next_state = SDP_STATE_IDLE; 693 sdp_func->error_status = status; 694 695 /* Only send Report 4 if there was an error */ 696 if (status) 697 sdp_func->state = SDP_STATE_TX_STATUS; 698 else 699 sdp_func->state = SDP_STATE_IDLE; 700 break; 701 default: 702 break; 703 }; 704 } 705 706 void sdp_handle(int controller_index) 707 { 708 printf("SDP: handle requests...\n"); 709 while (1) { 710 if (ctrlc()) { 711 puts("\rCTRL+C - Operation aborted.\n"); 712 return; 713 } 714 715 usb_gadget_handle_interrupts(controller_index); 716 717 sdp_handle_in_ep(); 718 } 719 } 720 721 int sdp_add(struct usb_configuration *c) 722 { 723 int id; 724 725 id = usb_string_id(c->cdev); 726 if (id < 0) 727 return id; 728 strings_sdp_generic[0].id = id; 729 sdp_intf_runtime.iInterface = id; 730 731 debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__, 732 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 733 734 return sdp_bind_config(c); 735 } 736 737 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add); 738