1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * f_sdp.c -- USB HID Serial Download Protocol 4 * 5 * Copyright (C) 2017 Toradex 6 * Author: Stefan Agner <stefan.agner@toradex.com> 7 * 8 * This file implements the Serial Download Protocol (SDP) as specified in 9 * the i.MX 6 Reference Manual. The SDP is a USB HID based protocol and 10 * allows to download images directly to memory. The implementation 11 * works with the imx_loader (imx_usb) USB client software on host side. 12 * 13 * Not all commands are implemented, e.g. WRITE_REGISTER, DCD_WRITE and 14 * SKIP_DCD_HEADER are only stubs. 15 * 16 * Parts of the implementation are based on f_dfu and f_thor. 17 */ 18 19 #include <errno.h> 20 #include <common.h> 21 #include <console.h> 22 #include <malloc.h> 23 24 #include <linux/usb/ch9.h> 25 #include <linux/usb/gadget.h> 26 #include <linux/usb/composite.h> 27 28 #include <asm/io.h> 29 #include <g_dnl.h> 30 #include <sdp.h> 31 #include <spl.h> 32 #include <image.h> 33 #include <imximage.h> 34 #include <watchdog.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 inline void *sdp_ptr(u32 val) 233 { 234 return (void *)(uintptr_t)val; 235 } 236 237 static void sdp_rx_command_complete(struct usb_ep *ep, struct usb_request *req) 238 { 239 struct f_sdp *sdp = req->context; 240 int status = req->status; 241 u8 *data = req->buf; 242 u8 report = data[0]; 243 244 if (status != 0) { 245 pr_err("Status: %d\n", status); 246 return; 247 } 248 249 if (report != 1) { 250 pr_err("Unexpected report %d\n", report); 251 return; 252 } 253 254 struct sdp_command *cmd = req->buf + 1; 255 256 debug("%s: command: %04x, addr: %08x, cnt: %u\n", 257 __func__, be16_to_cpu(cmd->cmd), 258 be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt)); 259 260 switch (be16_to_cpu(cmd->cmd)) { 261 case SDP_READ_REGISTER: 262 sdp->always_send_status = false; 263 sdp->error_status = 0x0; 264 265 sdp->state = SDP_STATE_TX_SEC_CONF; 266 sdp->dnl_address = be32_to_cpu(cmd->addr); 267 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 268 sdp->next_state = SDP_STATE_TX_REGISTER; 269 printf("Reading %d registers at 0x%08x... ", 270 sdp->dnl_bytes_remaining, sdp->dnl_address); 271 break; 272 case SDP_WRITE_FILE: 273 sdp->always_send_status = true; 274 sdp->error_status = SDP_WRITE_FILE_COMPLETE; 275 276 sdp->state = SDP_STATE_RX_FILE_DATA; 277 sdp->dnl_address = be32_to_cpu(cmd->addr); 278 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 279 sdp->next_state = SDP_STATE_IDLE; 280 281 printf("Downloading file of size %d to 0x%08x... ", 282 sdp->dnl_bytes_remaining, sdp->dnl_address); 283 284 break; 285 case SDP_ERROR_STATUS: 286 sdp->always_send_status = true; 287 sdp->error_status = 0; 288 289 sdp->state = SDP_STATE_TX_SEC_CONF; 290 sdp->next_state = SDP_STATE_IDLE; 291 break; 292 case SDP_DCD_WRITE: 293 sdp->always_send_status = true; 294 sdp->error_status = SDP_WRITE_REGISTER_COMPLETE; 295 296 sdp->state = SDP_STATE_RX_DCD_DATA; 297 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 298 sdp->next_state = SDP_STATE_IDLE; 299 break; 300 case SDP_JUMP_ADDRESS: 301 sdp->always_send_status = false; 302 sdp->error_status = 0; 303 304 sdp->jmp_address = be32_to_cpu(cmd->addr); 305 sdp->state = SDP_STATE_TX_SEC_CONF; 306 sdp->next_state = SDP_STATE_JUMP; 307 break; 308 case SDP_SKIP_DCD_HEADER: 309 sdp->always_send_status = true; 310 sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE; 311 312 /* Ignore command, DCD not supported anyway */ 313 sdp->state = SDP_STATE_TX_SEC_CONF; 314 sdp->next_state = SDP_STATE_IDLE; 315 break; 316 default: 317 pr_err("Unknown command: %04x\n", be16_to_cpu(cmd->cmd)); 318 } 319 } 320 321 static void sdp_rx_data_complete(struct usb_ep *ep, struct usb_request *req) 322 { 323 struct f_sdp *sdp = req->context; 324 int status = req->status; 325 u8 *data = req->buf; 326 u8 report = data[0]; 327 int datalen = req->length - 1; 328 329 if (status != 0) { 330 pr_err("Status: %d\n", status); 331 return; 332 } 333 334 if (report != 2) { 335 pr_err("Unexpected report %d\n", report); 336 return; 337 } 338 339 if (sdp->dnl_bytes_remaining < datalen) { 340 /* 341 * Some USB stacks require to send a complete buffer as 342 * specified in the HID descriptor. This leads to longer 343 * transfers than the file length, no problem for us. 344 */ 345 sdp->dnl_bytes_remaining = 0; 346 } else { 347 sdp->dnl_bytes_remaining -= datalen; 348 } 349 350 if (sdp->state == SDP_STATE_RX_FILE_DATA) { 351 memcpy(sdp_ptr(sdp->dnl_address), req->buf + 1, datalen); 352 sdp->dnl_address += datalen; 353 } 354 355 if (sdp->dnl_bytes_remaining) 356 return; 357 358 printf("done\n"); 359 360 switch (sdp->state) { 361 case SDP_STATE_RX_FILE_DATA: 362 sdp->state = SDP_STATE_TX_SEC_CONF; 363 break; 364 case SDP_STATE_RX_DCD_DATA: 365 sdp->state = SDP_STATE_TX_SEC_CONF; 366 break; 367 default: 368 pr_err("Invalid state: %d\n", sdp->state); 369 } 370 } 371 372 static void sdp_tx_complete(struct usb_ep *ep, struct usb_request *req) 373 { 374 struct f_sdp *sdp = req->context; 375 int status = req->status; 376 377 if (status != 0) { 378 pr_err("Status: %d\n", status); 379 return; 380 } 381 382 switch (sdp->state) { 383 case SDP_STATE_TX_SEC_CONF_BUSY: 384 /* Not all commands require status report */ 385 if (sdp->always_send_status || sdp->error_status) 386 sdp->state = SDP_STATE_TX_STATUS; 387 else 388 sdp->state = sdp->next_state; 389 390 break; 391 case SDP_STATE_TX_STATUS_BUSY: 392 sdp->state = sdp->next_state; 393 break; 394 case SDP_STATE_TX_REGISTER_BUSY: 395 if (sdp->dnl_bytes_remaining) 396 sdp->state = SDP_STATE_TX_REGISTER; 397 else 398 sdp->state = SDP_STATE_IDLE; 399 break; 400 default: 401 pr_err("Wrong State: %d\n", sdp->state); 402 sdp->state = SDP_STATE_IDLE; 403 break; 404 } 405 debug("%s complete --> %d, %d/%d\n", ep->name, 406 status, req->actual, req->length); 407 } 408 409 static int sdp_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 410 { 411 struct usb_gadget *gadget = f->config->cdev->gadget; 412 struct usb_request *req = f->config->cdev->req; 413 struct f_sdp *sdp = f->config->cdev->req->context; 414 u16 len = le16_to_cpu(ctrl->wLength); 415 u16 w_value = le16_to_cpu(ctrl->wValue); 416 int value = 0; 417 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 418 419 debug("w_value: 0x%04x len: 0x%04x\n", w_value, len); 420 debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n", 421 req_type, ctrl->bRequest, sdp->state); 422 423 if (req_type == USB_TYPE_STANDARD) { 424 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) { 425 /* Send HID report descriptor */ 426 value = min(len, (u16) sizeof(sdp_hid_report)); 427 memcpy(req->buf, &sdp_hid_report, value); 428 sdp->configuration_done = true; 429 } 430 } 431 432 if (req_type == USB_TYPE_CLASS) { 433 int report = w_value & HID_REPORT_ID_MASK; 434 435 /* HID (SDP) request */ 436 switch (ctrl->bRequest) { 437 case HID_REQ_SET_REPORT: 438 switch (report) { 439 case 1: 440 value = SDP_COMMAND_LEN + 1; 441 req->complete = sdp_rx_command_complete; 442 break; 443 case 2: 444 value = len; 445 req->complete = sdp_rx_data_complete; 446 break; 447 } 448 } 449 } 450 451 if (value >= 0) { 452 req->length = value; 453 req->zero = value < len; 454 value = usb_ep_queue(gadget->ep0, req, 0); 455 if (value < 0) { 456 debug("ep_queue --> %d\n", value); 457 req->status = 0; 458 } 459 } 460 461 return value; 462 } 463 464 static int sdp_bind(struct usb_configuration *c, struct usb_function *f) 465 { 466 struct usb_gadget *gadget = c->cdev->gadget; 467 struct usb_composite_dev *cdev = c->cdev; 468 struct f_sdp *sdp = func_to_sdp(f); 469 int rv = 0, id; 470 471 id = usb_interface_id(c, f); 472 if (id < 0) 473 return id; 474 sdp_intf_runtime.bInterfaceNumber = id; 475 476 struct usb_ep *ep; 477 478 /* allocate instance-specific endpoints */ 479 ep = usb_ep_autoconfig(gadget, &in_desc); 480 if (!ep) { 481 rv = -ENODEV; 482 goto error; 483 } 484 485 sdp->in_ep = ep; /* Store IN EP for enabling @ setup */ 486 487 cdev->req->context = sdp; 488 489 error: 490 return rv; 491 } 492 493 static void sdp_unbind(struct usb_configuration *c, struct usb_function *f) 494 { 495 free(sdp_func); 496 sdp_func = NULL; 497 } 498 499 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 500 { 501 struct usb_request *req; 502 503 req = usb_ep_alloc_request(ep, 0); 504 if (!req) 505 return req; 506 507 req->length = length; 508 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 509 if (!req->buf) { 510 usb_ep_free_request(ep, req); 511 req = NULL; 512 } 513 514 return req; 515 } 516 517 518 static struct usb_request *sdp_start_ep(struct usb_ep *ep) 519 { 520 struct usb_request *req; 521 522 req = alloc_ep_req(ep, 64); 523 debug("%s: ep:%p req:%p\n", __func__, ep, req); 524 525 if (!req) 526 return NULL; 527 528 memset(req->buf, 0, req->length); 529 req->complete = sdp_tx_complete; 530 531 return req; 532 } 533 static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 534 { 535 struct f_sdp *sdp = func_to_sdp(f); 536 struct usb_composite_dev *cdev = f->config->cdev; 537 int result; 538 539 debug("%s: intf: %d alt: %d\n", __func__, intf, alt); 540 541 result = usb_ep_enable(sdp->in_ep, &in_desc); 542 if (result) 543 return result; 544 sdp->in_req = sdp_start_ep(sdp->in_ep); 545 sdp->in_req->context = sdp; 546 547 sdp->in_ep->driver_data = cdev; /* claim */ 548 549 sdp->altsetting = alt; 550 sdp->state = SDP_STATE_IDLE; 551 552 return 0; 553 } 554 555 static int sdp_get_alt(struct usb_function *f, unsigned intf) 556 { 557 struct f_sdp *sdp = func_to_sdp(f); 558 559 return sdp->altsetting; 560 } 561 562 static void sdp_disable(struct usb_function *f) 563 { 564 struct f_sdp *sdp = func_to_sdp(f); 565 566 usb_ep_disable(sdp->in_ep); 567 568 if (sdp->in_req) { 569 free(sdp->in_req); 570 sdp->in_req = NULL; 571 } 572 } 573 574 static int sdp_bind_config(struct usb_configuration *c) 575 { 576 int status; 577 578 if (!sdp_func) { 579 sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func)); 580 if (!sdp_func) 581 return -ENOMEM; 582 } 583 584 memset(sdp_func, 0, sizeof(*sdp_func)); 585 586 sdp_func->usb_function.name = "sdp"; 587 sdp_func->usb_function.hs_descriptors = sdp_runtime_descs; 588 sdp_func->usb_function.descriptors = sdp_runtime_descs; 589 sdp_func->usb_function.bind = sdp_bind; 590 sdp_func->usb_function.unbind = sdp_unbind; 591 sdp_func->usb_function.set_alt = sdp_set_alt; 592 sdp_func->usb_function.get_alt = sdp_get_alt; 593 sdp_func->usb_function.disable = sdp_disable; 594 sdp_func->usb_function.strings = sdp_generic_strings; 595 sdp_func->usb_function.setup = sdp_setup; 596 597 status = usb_add_function(c, &sdp_func->usb_function); 598 599 return status; 600 } 601 602 int sdp_init(int controller_index) 603 { 604 printf("SDP: initialize...\n"); 605 while (!sdp_func->configuration_done) { 606 if (ctrlc()) { 607 puts("\rCTRL+C - Operation aborted.\n"); 608 return 1; 609 } 610 611 WATCHDOG_RESET(); 612 usb_gadget_handle_interrupts(controller_index); 613 } 614 615 return 0; 616 } 617 618 static u32 sdp_jump_imxheader(void *address) 619 { 620 flash_header_v2_t *headerv2 = address; 621 ulong (*entry)(void); 622 623 if (headerv2->header.tag != IVT_HEADER_TAG) { 624 printf("Header Tag is not an IMX image\n"); 625 return SDP_ERROR_IMXHEADER; 626 } 627 628 printf("Jumping to 0x%08x\n", headerv2->entry); 629 entry = sdp_ptr(headerv2->entry); 630 entry(); 631 632 /* The image probably never returns hence we won't reach that point */ 633 return 0; 634 } 635 636 static void sdp_handle_in_ep(void) 637 { 638 u8 *data = sdp_func->in_req->buf; 639 u32 status; 640 int datalen; 641 642 switch (sdp_func->state) { 643 case SDP_STATE_TX_SEC_CONF: 644 debug("Report 3: HAB security\n"); 645 data[0] = 3; 646 647 status = SDP_SECURITY_OPEN; 648 memcpy(&data[1], &status, 4); 649 sdp_func->in_req->length = 5; 650 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 651 sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY; 652 break; 653 654 case SDP_STATE_TX_STATUS: 655 debug("Report 4: Status\n"); 656 data[0] = 4; 657 658 memcpy(&data[1], &sdp_func->error_status, 4); 659 sdp_func->in_req->length = 65; 660 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 661 sdp_func->state = SDP_STATE_TX_STATUS_BUSY; 662 break; 663 case SDP_STATE_TX_REGISTER: 664 debug("Report 4: Register Values\n"); 665 data[0] = 4; 666 667 datalen = sdp_func->dnl_bytes_remaining; 668 669 if (datalen > 64) 670 datalen = 64; 671 672 memcpy(&data[1], sdp_ptr(sdp_func->dnl_address), datalen); 673 sdp_func->in_req->length = 65; 674 675 sdp_func->dnl_bytes_remaining -= datalen; 676 sdp_func->dnl_address += datalen; 677 678 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 679 sdp_func->state = SDP_STATE_TX_REGISTER_BUSY; 680 break; 681 case SDP_STATE_JUMP: 682 printf("Jumping to header at 0x%08x\n", sdp_func->jmp_address); 683 status = sdp_jump_imxheader(sdp_ptr(sdp_func->jmp_address)); 684 685 /* If imx header fails, try some U-Boot specific headers */ 686 if (status) { 687 #ifdef CONFIG_SPL_BUILD 688 /* In SPL, allow jumps to U-Boot images */ 689 struct spl_image_info spl_image = {}; 690 spl_parse_image_header(&spl_image, 691 (struct image_header *)sdp_func->jmp_address); 692 jump_to_image_no_args(&spl_image); 693 #else 694 /* In U-Boot, allow jumps to scripts */ 695 source(sdp_func->jmp_address, "script@1"); 696 #endif 697 } 698 699 sdp_func->next_state = SDP_STATE_IDLE; 700 sdp_func->error_status = status; 701 702 /* Only send Report 4 if there was an error */ 703 if (status) 704 sdp_func->state = SDP_STATE_TX_STATUS; 705 else 706 sdp_func->state = SDP_STATE_IDLE; 707 break; 708 default: 709 break; 710 }; 711 } 712 713 void sdp_handle(int controller_index) 714 { 715 printf("SDP: handle requests...\n"); 716 while (1) { 717 if (ctrlc()) { 718 puts("\rCTRL+C - Operation aborted.\n"); 719 return; 720 } 721 722 WATCHDOG_RESET(); 723 usb_gadget_handle_interrupts(controller_index); 724 725 sdp_handle_in_ep(); 726 } 727 } 728 729 int sdp_add(struct usb_configuration *c) 730 { 731 int id; 732 733 id = usb_string_id(c->cdev); 734 if (id < 0) 735 return id; 736 strings_sdp_generic[0].id = id; 737 sdp_intf_runtime.iInterface = id; 738 739 debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__, 740 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 741 742 return sdp_bind_config(c); 743 } 744 745 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add); 746