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 #include <watchdog.h> 36 37 #define HID_REPORT_ID_MASK 0x000000ff 38 39 /* 40 * HID class requests 41 */ 42 #define HID_REQ_GET_REPORT 0x01 43 #define HID_REQ_GET_IDLE 0x02 44 #define HID_REQ_GET_PROTOCOL 0x03 45 #define HID_REQ_SET_REPORT 0x09 46 #define HID_REQ_SET_IDLE 0x0A 47 #define HID_REQ_SET_PROTOCOL 0x0B 48 49 #define HID_USAGE_PAGE_LEN 76 50 51 struct hid_report { 52 u8 usage_page[HID_USAGE_PAGE_LEN]; 53 } __packed; 54 55 #define SDP_READ_REGISTER 0x0101 56 #define SDP_WRITE_REGISTER 0x0202 57 #define SDP_WRITE_FILE 0x0404 58 #define SDP_ERROR_STATUS 0x0505 59 #define SDP_DCD_WRITE 0x0a0a 60 #define SDP_JUMP_ADDRESS 0x0b0b 61 #define SDP_SKIP_DCD_HEADER 0x0c0c 62 63 #define SDP_SECURITY_CLOSED 0x12343412 64 #define SDP_SECURITY_OPEN 0x56787856 65 66 #define SDP_WRITE_FILE_COMPLETE 0x88888888 67 #define SDP_WRITE_REGISTER_COMPLETE 0x128A8A12 68 #define SDP_SKIP_DCD_HEADER_COMPLETE 0x900DD009 69 #define SDP_ERROR_IMXHEADER 0x000a0533 70 71 #define SDP_COMMAND_LEN 16 72 73 struct sdp_command { 74 u16 cmd; 75 u32 addr; 76 u8 format; 77 u32 cnt; 78 u32 data; 79 u8 rsvd; 80 } __packed; 81 82 enum sdp_state { 83 SDP_STATE_IDLE, 84 SDP_STATE_RX_DCD_DATA, 85 SDP_STATE_RX_FILE_DATA, 86 SDP_STATE_TX_SEC_CONF, 87 SDP_STATE_TX_SEC_CONF_BUSY, 88 SDP_STATE_TX_REGISTER, 89 SDP_STATE_TX_REGISTER_BUSY, 90 SDP_STATE_TX_STATUS, 91 SDP_STATE_TX_STATUS_BUSY, 92 SDP_STATE_JUMP, 93 }; 94 95 struct f_sdp { 96 struct usb_function usb_function; 97 98 struct usb_descriptor_header **function; 99 100 u8 altsetting; 101 enum sdp_state state; 102 enum sdp_state next_state; 103 u32 dnl_address; 104 u32 dnl_bytes_remaining; 105 u32 jmp_address; 106 bool always_send_status; 107 u32 error_status; 108 109 /* EP0 request */ 110 struct usb_request *req; 111 112 /* EP1 IN */ 113 struct usb_ep *in_ep; 114 struct usb_request *in_req; 115 116 bool configuration_done; 117 }; 118 119 static struct f_sdp *sdp_func; 120 121 static inline struct f_sdp *func_to_sdp(struct usb_function *f) 122 { 123 return container_of(f, struct f_sdp, usb_function); 124 } 125 126 static struct usb_interface_descriptor sdp_intf_runtime = { 127 .bLength = sizeof(sdp_intf_runtime), 128 .bDescriptorType = USB_DT_INTERFACE, 129 .bAlternateSetting = 0, 130 .bNumEndpoints = 1, 131 .bInterfaceClass = USB_CLASS_HID, 132 .bInterfaceSubClass = 0, 133 .bInterfaceProtocol = 0, 134 /* .iInterface = DYNAMIC */ 135 }; 136 137 /* HID configuration */ 138 static struct usb_class_hid_descriptor sdp_hid_desc = { 139 .bLength = sizeof(sdp_hid_desc), 140 .bDescriptorType = USB_DT_CS_DEVICE, 141 142 .bcdCDC = __constant_cpu_to_le16(0x0110), 143 .bCountryCode = 0, 144 .bNumDescriptors = 1, 145 146 .bDescriptorType0 = USB_DT_HID_REPORT, 147 .wDescriptorLength0 = HID_USAGE_PAGE_LEN, 148 }; 149 150 static struct usb_endpoint_descriptor in_desc = { 151 .bLength = USB_DT_ENDPOINT_SIZE, 152 .bDescriptorType = USB_DT_ENDPOINT, /*USB_DT_CS_ENDPOINT*/ 153 154 .bEndpointAddress = 1 | USB_DIR_IN, 155 .bmAttributes = USB_ENDPOINT_XFER_INT, 156 .wMaxPacketSize = 64, 157 .bInterval = 1, 158 }; 159 160 static struct usb_descriptor_header *sdp_runtime_descs[] = { 161 (struct usb_descriptor_header *)&sdp_intf_runtime, 162 (struct usb_descriptor_header *)&sdp_hid_desc, 163 (struct usb_descriptor_header *)&in_desc, 164 NULL, 165 }; 166 167 /* This is synchronized with what the SoC implementation reports */ 168 static struct hid_report sdp_hid_report = { 169 .usage_page = { 170 0x06, 0x00, 0xff, /* Usage Page */ 171 0x09, 0x01, /* Usage (Pointer?) */ 172 0xa1, 0x01, /* Collection */ 173 174 0x85, 0x01, /* Report ID */ 175 0x19, 0x01, /* Usage Minimum */ 176 0x29, 0x01, /* Usage Maximum */ 177 0x15, 0x00, /* Local Minimum */ 178 0x26, 0xFF, 0x00, /* Local Maximum? */ 179 0x75, 0x08, /* Report Size */ 180 0x95, 0x10, /* Report Count */ 181 0x91, 0x02, /* Output Data */ 182 183 0x85, 0x02, /* Report ID */ 184 0x19, 0x01, /* Usage Minimum */ 185 0x29, 0x01, /* Usage Maximum */ 186 0x15, 0x00, /* Local Minimum */ 187 0x26, 0xFF, 0x00, /* Local Maximum? */ 188 0x75, 0x80, /* Report Size 128 */ 189 0x95, 0x40, /* Report Count */ 190 0x91, 0x02, /* Output Data */ 191 192 0x85, 0x03, /* Report ID */ 193 0x19, 0x01, /* Usage Minimum */ 194 0x29, 0x01, /* Usage Maximum */ 195 0x15, 0x00, /* Local Minimum */ 196 0x26, 0xFF, 0x00, /* Local Maximum? */ 197 0x75, 0x08, /* Report Size 8 */ 198 0x95, 0x04, /* Report Count */ 199 0x81, 0x02, /* Input Data */ 200 201 0x85, 0x04, /* Report ID */ 202 0x19, 0x01, /* Usage Minimum */ 203 0x29, 0x01, /* Usage Maximum */ 204 0x15, 0x00, /* Local Minimum */ 205 0x26, 0xFF, 0x00, /* Local Maximum? */ 206 0x75, 0x08, /* Report Size 8 */ 207 0x95, 0x40, /* Report Count */ 208 0x81, 0x02, /* Input Data */ 209 0xc0 210 }, 211 }; 212 213 static const char sdp_name[] = "Serial Downloader Protocol"; 214 215 /* 216 * static strings, in UTF-8 217 */ 218 static struct usb_string strings_sdp_generic[] = { 219 [0].s = sdp_name, 220 { } /* end of list */ 221 }; 222 223 static struct usb_gadget_strings stringtab_sdp_generic = { 224 .language = 0x0409, /* en-us */ 225 .strings = strings_sdp_generic, 226 }; 227 228 static struct usb_gadget_strings *sdp_generic_strings[] = { 229 &stringtab_sdp_generic, 230 NULL, 231 }; 232 233 static inline void *sdp_ptr(u32 val) 234 { 235 return (void *)(uintptr_t)val; 236 } 237 238 static void sdp_rx_command_complete(struct usb_ep *ep, struct usb_request *req) 239 { 240 struct f_sdp *sdp = req->context; 241 int status = req->status; 242 u8 *data = req->buf; 243 u8 report = data[0]; 244 245 if (status != 0) { 246 pr_err("Status: %d\n", status); 247 return; 248 } 249 250 if (report != 1) { 251 pr_err("Unexpected report %d\n", report); 252 return; 253 } 254 255 struct sdp_command *cmd = req->buf + 1; 256 257 debug("%s: command: %04x, addr: %08x, cnt: %u\n", 258 __func__, be16_to_cpu(cmd->cmd), 259 be32_to_cpu(cmd->addr), be32_to_cpu(cmd->cnt)); 260 261 switch (be16_to_cpu(cmd->cmd)) { 262 case SDP_READ_REGISTER: 263 sdp->always_send_status = false; 264 sdp->error_status = 0x0; 265 266 sdp->state = SDP_STATE_TX_SEC_CONF; 267 sdp->dnl_address = be32_to_cpu(cmd->addr); 268 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 269 sdp->next_state = SDP_STATE_TX_REGISTER; 270 printf("Reading %d registers at 0x%08x... ", 271 sdp->dnl_bytes_remaining, sdp->dnl_address); 272 break; 273 case SDP_WRITE_FILE: 274 sdp->always_send_status = true; 275 sdp->error_status = SDP_WRITE_FILE_COMPLETE; 276 277 sdp->state = SDP_STATE_RX_FILE_DATA; 278 sdp->dnl_address = be32_to_cpu(cmd->addr); 279 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 280 sdp->next_state = SDP_STATE_IDLE; 281 282 printf("Downloading file of size %d to 0x%08x... ", 283 sdp->dnl_bytes_remaining, sdp->dnl_address); 284 285 break; 286 case SDP_ERROR_STATUS: 287 sdp->always_send_status = true; 288 sdp->error_status = 0; 289 290 sdp->state = SDP_STATE_TX_SEC_CONF; 291 sdp->next_state = SDP_STATE_IDLE; 292 break; 293 case SDP_DCD_WRITE: 294 sdp->always_send_status = true; 295 sdp->error_status = SDP_WRITE_REGISTER_COMPLETE; 296 297 sdp->state = SDP_STATE_RX_DCD_DATA; 298 sdp->dnl_bytes_remaining = be32_to_cpu(cmd->cnt); 299 sdp->next_state = SDP_STATE_IDLE; 300 break; 301 case SDP_JUMP_ADDRESS: 302 sdp->always_send_status = false; 303 sdp->error_status = 0; 304 305 sdp->jmp_address = be32_to_cpu(cmd->addr); 306 sdp->state = SDP_STATE_TX_SEC_CONF; 307 sdp->next_state = SDP_STATE_JUMP; 308 break; 309 case SDP_SKIP_DCD_HEADER: 310 sdp->always_send_status = true; 311 sdp->error_status = SDP_SKIP_DCD_HEADER_COMPLETE; 312 313 /* Ignore command, DCD not supported anyway */ 314 sdp->state = SDP_STATE_TX_SEC_CONF; 315 sdp->next_state = SDP_STATE_IDLE; 316 break; 317 default: 318 pr_err("Unknown command: %04x\n", be16_to_cpu(cmd->cmd)); 319 } 320 } 321 322 static void sdp_rx_data_complete(struct usb_ep *ep, struct usb_request *req) 323 { 324 struct f_sdp *sdp = req->context; 325 int status = req->status; 326 u8 *data = req->buf; 327 u8 report = data[0]; 328 int datalen = req->length - 1; 329 330 if (status != 0) { 331 pr_err("Status: %d\n", status); 332 return; 333 } 334 335 if (report != 2) { 336 pr_err("Unexpected report %d\n", report); 337 return; 338 } 339 340 if (sdp->dnl_bytes_remaining < datalen) { 341 /* 342 * Some USB stacks require to send a complete buffer as 343 * specified in the HID descriptor. This leads to longer 344 * transfers than the file length, no problem for us. 345 */ 346 sdp->dnl_bytes_remaining = 0; 347 } else { 348 sdp->dnl_bytes_remaining -= datalen; 349 } 350 351 if (sdp->state == SDP_STATE_RX_FILE_DATA) { 352 memcpy(sdp_ptr(sdp->dnl_address), req->buf + 1, datalen); 353 sdp->dnl_address += datalen; 354 } 355 356 if (sdp->dnl_bytes_remaining) 357 return; 358 359 printf("done\n"); 360 361 switch (sdp->state) { 362 case SDP_STATE_RX_FILE_DATA: 363 sdp->state = SDP_STATE_TX_SEC_CONF; 364 break; 365 case SDP_STATE_RX_DCD_DATA: 366 sdp->state = SDP_STATE_TX_SEC_CONF; 367 break; 368 default: 369 pr_err("Invalid state: %d\n", sdp->state); 370 } 371 } 372 373 static void sdp_tx_complete(struct usb_ep *ep, struct usb_request *req) 374 { 375 struct f_sdp *sdp = req->context; 376 int status = req->status; 377 378 if (status != 0) { 379 pr_err("Status: %d\n", status); 380 return; 381 } 382 383 switch (sdp->state) { 384 case SDP_STATE_TX_SEC_CONF_BUSY: 385 /* Not all commands require status report */ 386 if (sdp->always_send_status || sdp->error_status) 387 sdp->state = SDP_STATE_TX_STATUS; 388 else 389 sdp->state = sdp->next_state; 390 391 break; 392 case SDP_STATE_TX_STATUS_BUSY: 393 sdp->state = sdp->next_state; 394 break; 395 case SDP_STATE_TX_REGISTER_BUSY: 396 if (sdp->dnl_bytes_remaining) 397 sdp->state = SDP_STATE_TX_REGISTER; 398 else 399 sdp->state = SDP_STATE_IDLE; 400 break; 401 default: 402 pr_err("Wrong State: %d\n", sdp->state); 403 sdp->state = SDP_STATE_IDLE; 404 break; 405 } 406 debug("%s complete --> %d, %d/%d\n", ep->name, 407 status, req->actual, req->length); 408 } 409 410 static int sdp_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 411 { 412 struct usb_gadget *gadget = f->config->cdev->gadget; 413 struct usb_request *req = f->config->cdev->req; 414 struct f_sdp *sdp = f->config->cdev->req->context; 415 u16 len = le16_to_cpu(ctrl->wLength); 416 u16 w_value = le16_to_cpu(ctrl->wValue); 417 int value = 0; 418 u8 req_type = ctrl->bRequestType & USB_TYPE_MASK; 419 420 debug("w_value: 0x%04x len: 0x%04x\n", w_value, len); 421 debug("req_type: 0x%02x ctrl->bRequest: 0x%02x sdp->state: %d\n", 422 req_type, ctrl->bRequest, sdp->state); 423 424 if (req_type == USB_TYPE_STANDARD) { 425 if (ctrl->bRequest == USB_REQ_GET_DESCRIPTOR) { 426 /* Send HID report descriptor */ 427 value = min(len, (u16) sizeof(sdp_hid_report)); 428 memcpy(req->buf, &sdp_hid_report, value); 429 sdp->configuration_done = true; 430 } 431 } 432 433 if (req_type == USB_TYPE_CLASS) { 434 int report = w_value & HID_REPORT_ID_MASK; 435 436 /* HID (SDP) request */ 437 switch (ctrl->bRequest) { 438 case HID_REQ_SET_REPORT: 439 switch (report) { 440 case 1: 441 value = SDP_COMMAND_LEN + 1; 442 req->complete = sdp_rx_command_complete; 443 break; 444 case 2: 445 value = len; 446 req->complete = sdp_rx_data_complete; 447 break; 448 } 449 } 450 } 451 452 if (value >= 0) { 453 req->length = value; 454 req->zero = value < len; 455 value = usb_ep_queue(gadget->ep0, req, 0); 456 if (value < 0) { 457 debug("ep_queue --> %d\n", value); 458 req->status = 0; 459 } 460 } 461 462 return value; 463 } 464 465 static int sdp_bind(struct usb_configuration *c, struct usb_function *f) 466 { 467 struct usb_gadget *gadget = c->cdev->gadget; 468 struct usb_composite_dev *cdev = c->cdev; 469 struct f_sdp *sdp = func_to_sdp(f); 470 int rv = 0, id; 471 472 id = usb_interface_id(c, f); 473 if (id < 0) 474 return id; 475 sdp_intf_runtime.bInterfaceNumber = id; 476 477 struct usb_ep *ep; 478 479 /* allocate instance-specific endpoints */ 480 ep = usb_ep_autoconfig(gadget, &in_desc); 481 if (!ep) { 482 rv = -ENODEV; 483 goto error; 484 } 485 486 sdp->in_ep = ep; /* Store IN EP for enabling @ setup */ 487 488 cdev->req->context = sdp; 489 490 error: 491 return rv; 492 } 493 494 static void sdp_unbind(struct usb_configuration *c, struct usb_function *f) 495 { 496 free(sdp_func); 497 sdp_func = NULL; 498 } 499 500 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 501 { 502 struct usb_request *req; 503 504 req = usb_ep_alloc_request(ep, 0); 505 if (!req) 506 return req; 507 508 req->length = length; 509 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 510 if (!req->buf) { 511 usb_ep_free_request(ep, req); 512 req = NULL; 513 } 514 515 return req; 516 } 517 518 519 static struct usb_request *sdp_start_ep(struct usb_ep *ep) 520 { 521 struct usb_request *req; 522 523 req = alloc_ep_req(ep, 64); 524 debug("%s: ep:%p req:%p\n", __func__, ep, req); 525 526 if (!req) 527 return NULL; 528 529 memset(req->buf, 0, req->length); 530 req->complete = sdp_tx_complete; 531 532 return req; 533 } 534 static int sdp_set_alt(struct usb_function *f, unsigned intf, unsigned alt) 535 { 536 struct f_sdp *sdp = func_to_sdp(f); 537 struct usb_composite_dev *cdev = f->config->cdev; 538 int result; 539 540 debug("%s: intf: %d alt: %d\n", __func__, intf, alt); 541 542 result = usb_ep_enable(sdp->in_ep, &in_desc); 543 if (result) 544 return result; 545 sdp->in_req = sdp_start_ep(sdp->in_ep); 546 sdp->in_req->context = sdp; 547 548 sdp->in_ep->driver_data = cdev; /* claim */ 549 550 sdp->altsetting = alt; 551 sdp->state = SDP_STATE_IDLE; 552 553 return 0; 554 } 555 556 static int sdp_get_alt(struct usb_function *f, unsigned intf) 557 { 558 struct f_sdp *sdp = func_to_sdp(f); 559 560 return sdp->altsetting; 561 } 562 563 static void sdp_disable(struct usb_function *f) 564 { 565 struct f_sdp *sdp = func_to_sdp(f); 566 567 usb_ep_disable(sdp->in_ep); 568 569 if (sdp->in_req) { 570 free(sdp->in_req); 571 sdp->in_req = NULL; 572 } 573 } 574 575 static int sdp_bind_config(struct usb_configuration *c) 576 { 577 int status; 578 579 if (!sdp_func) { 580 sdp_func = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*sdp_func)); 581 if (!sdp_func) 582 return -ENOMEM; 583 } 584 585 memset(sdp_func, 0, sizeof(*sdp_func)); 586 587 sdp_func->usb_function.name = "sdp"; 588 sdp_func->usb_function.hs_descriptors = sdp_runtime_descs; 589 sdp_func->usb_function.descriptors = sdp_runtime_descs; 590 sdp_func->usb_function.bind = sdp_bind; 591 sdp_func->usb_function.unbind = sdp_unbind; 592 sdp_func->usb_function.set_alt = sdp_set_alt; 593 sdp_func->usb_function.get_alt = sdp_get_alt; 594 sdp_func->usb_function.disable = sdp_disable; 595 sdp_func->usb_function.strings = sdp_generic_strings; 596 sdp_func->usb_function.setup = sdp_setup; 597 598 status = usb_add_function(c, &sdp_func->usb_function); 599 600 return status; 601 } 602 603 int sdp_init(int controller_index) 604 { 605 printf("SDP: initialize...\n"); 606 while (!sdp_func->configuration_done) { 607 if (ctrlc()) { 608 puts("\rCTRL+C - Operation aborted.\n"); 609 return 1; 610 } 611 612 WATCHDOG_RESET(); 613 usb_gadget_handle_interrupts(controller_index); 614 } 615 616 return 0; 617 } 618 619 static u32 sdp_jump_imxheader(void *address) 620 { 621 flash_header_v2_t *headerv2 = address; 622 ulong (*entry)(void); 623 624 if (headerv2->header.tag != IVT_HEADER_TAG) { 625 printf("Header Tag is not an IMX image\n"); 626 return SDP_ERROR_IMXHEADER; 627 } 628 629 printf("Jumping to 0x%08x\n", headerv2->entry); 630 entry = sdp_ptr(headerv2->entry); 631 entry(); 632 633 /* The image probably never returns hence we won't reach that point */ 634 return 0; 635 } 636 637 static void sdp_handle_in_ep(void) 638 { 639 u8 *data = sdp_func->in_req->buf; 640 u32 status; 641 int datalen; 642 643 switch (sdp_func->state) { 644 case SDP_STATE_TX_SEC_CONF: 645 debug("Report 3: HAB security\n"); 646 data[0] = 3; 647 648 status = SDP_SECURITY_OPEN; 649 memcpy(&data[1], &status, 4); 650 sdp_func->in_req->length = 5; 651 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 652 sdp_func->state = SDP_STATE_TX_SEC_CONF_BUSY; 653 break; 654 655 case SDP_STATE_TX_STATUS: 656 debug("Report 4: Status\n"); 657 data[0] = 4; 658 659 memcpy(&data[1], &sdp_func->error_status, 4); 660 sdp_func->in_req->length = 65; 661 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 662 sdp_func->state = SDP_STATE_TX_STATUS_BUSY; 663 break; 664 case SDP_STATE_TX_REGISTER: 665 debug("Report 4: Register Values\n"); 666 data[0] = 4; 667 668 datalen = sdp_func->dnl_bytes_remaining; 669 670 if (datalen > 64) 671 datalen = 64; 672 673 memcpy(&data[1], sdp_ptr(sdp_func->dnl_address), datalen); 674 sdp_func->in_req->length = 65; 675 676 sdp_func->dnl_bytes_remaining -= datalen; 677 sdp_func->dnl_address += datalen; 678 679 usb_ep_queue(sdp_func->in_ep, sdp_func->in_req, 0); 680 sdp_func->state = SDP_STATE_TX_REGISTER_BUSY; 681 break; 682 case SDP_STATE_JUMP: 683 printf("Jumping to header at 0x%08x\n", sdp_func->jmp_address); 684 status = sdp_jump_imxheader(sdp_ptr(sdp_func->jmp_address)); 685 686 /* If imx header fails, try some U-Boot specific headers */ 687 if (status) { 688 #ifdef CONFIG_SPL_BUILD 689 /* In SPL, allow jumps to U-Boot images */ 690 struct spl_image_info spl_image = {}; 691 spl_parse_image_header(&spl_image, 692 (struct image_header *)sdp_func->jmp_address); 693 jump_to_image_no_args(&spl_image); 694 #else 695 /* In U-Boot, allow jumps to scripts */ 696 source(sdp_func->jmp_address, "script@1"); 697 #endif 698 } 699 700 sdp_func->next_state = SDP_STATE_IDLE; 701 sdp_func->error_status = status; 702 703 /* Only send Report 4 if there was an error */ 704 if (status) 705 sdp_func->state = SDP_STATE_TX_STATUS; 706 else 707 sdp_func->state = SDP_STATE_IDLE; 708 break; 709 default: 710 break; 711 }; 712 } 713 714 void sdp_handle(int controller_index) 715 { 716 printf("SDP: handle requests...\n"); 717 while (1) { 718 if (ctrlc()) { 719 puts("\rCTRL+C - Operation aborted.\n"); 720 return; 721 } 722 723 WATCHDOG_RESET(); 724 usb_gadget_handle_interrupts(controller_index); 725 726 sdp_handle_in_ep(); 727 } 728 } 729 730 int sdp_add(struct usb_configuration *c) 731 { 732 int id; 733 734 id = usb_string_id(c->cdev); 735 if (id < 0) 736 return id; 737 strings_sdp_generic[0].id = id; 738 sdp_intf_runtime.iInterface = id; 739 740 debug("%s: cdev: %p gadget: %p gadget->ep0: %p\n", __func__, 741 c->cdev, c->cdev->gadget, c->cdev->gadget->ep0); 742 743 return sdp_bind_config(c); 744 } 745 746 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_sdp, sdp_add); 747