1 /* 2 * f_thor.c -- USB TIZEN THOR Downloader gadget function 3 * 4 * Copyright (C) 2013 Samsung Electronics 5 * Lukasz Majewski <l.majewski@samsung.com> 6 * 7 * Based on code from: 8 * git://review.tizen.org/kernel/u-boot 9 * 10 * Developed by: 11 * Copyright (C) 2009 Samsung Electronics 12 * Minkyu Kang <mk7.kang@samsung.com> 13 * Sanghee Kim <sh0130.kim@samsung.com> 14 * 15 * SPDX-License-Identifier: GPL-2.0+ 16 */ 17 18 #include <errno.h> 19 #include <common.h> 20 #include <malloc.h> 21 #include <version.h> 22 #include <linux/usb/ch9.h> 23 #include <linux/usb/gadget.h> 24 #include <linux/usb/composite.h> 25 #include <linux/usb/cdc.h> 26 #include <g_dnl.h> 27 #include <dfu.h> 28 29 #include "f_thor.h" 30 31 static void thor_tx_data(unsigned char *data, int len); 32 static void thor_set_dma(void *addr, int len); 33 static int thor_rx_data(void); 34 35 static struct f_thor *thor_func; 36 static inline struct f_thor *func_to_thor(struct usb_function *f) 37 { 38 return container_of(f, struct f_thor, usb_function); 39 } 40 41 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_tx_data_buf, 42 sizeof(struct rsp_box)); 43 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_rx_data_buf, 44 sizeof(struct rqt_box)); 45 46 /* ********************************************************** */ 47 /* THOR protocol - transmission handling */ 48 /* ********************************************************** */ 49 DEFINE_CACHE_ALIGN_BUFFER(char, f_name, F_NAME_BUF_SIZE); 50 static unsigned long long int thor_file_size; 51 static int alt_setting_num; 52 53 static void send_rsp(const struct rsp_box *rsp) 54 { 55 memcpy(thor_tx_data_buf, rsp, sizeof(struct rsp_box)); 56 thor_tx_data(thor_tx_data_buf, sizeof(struct rsp_box)); 57 58 debug("-RSP: %d, %d\n", rsp->rsp, rsp->rsp_data); 59 } 60 61 static void send_data_rsp(s32 ack, s32 count) 62 { 63 ALLOC_CACHE_ALIGN_BUFFER(struct data_rsp_box, rsp, 64 sizeof(struct data_rsp_box)); 65 66 rsp->ack = ack; 67 rsp->count = count; 68 69 memcpy(thor_tx_data_buf, rsp, sizeof(struct data_rsp_box)); 70 thor_tx_data(thor_tx_data_buf, sizeof(struct data_rsp_box)); 71 72 debug("-DATA RSP: %d, %d\n", ack, count); 73 } 74 75 static int process_rqt_info(const struct rqt_box *rqt) 76 { 77 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 78 memset(rsp, 0, sizeof(struct rsp_box)); 79 80 rsp->rsp = rqt->rqt; 81 rsp->rsp_data = rqt->rqt_data; 82 83 switch (rqt->rqt_data) { 84 case RQT_INFO_VER_PROTOCOL: 85 rsp->int_data[0] = VER_PROTOCOL_MAJOR; 86 rsp->int_data[1] = VER_PROTOCOL_MINOR; 87 break; 88 case RQT_INIT_VER_HW: 89 snprintf(rsp->str_data[0], sizeof(rsp->str_data[0]), 90 "%x", checkboard()); 91 break; 92 case RQT_INIT_VER_BOOT: 93 sprintf(rsp->str_data[0], "%s", U_BOOT_VERSION); 94 break; 95 case RQT_INIT_VER_KERNEL: 96 sprintf(rsp->str_data[0], "%s", "k unknown"); 97 break; 98 case RQT_INIT_VER_PLATFORM: 99 sprintf(rsp->str_data[0], "%s", "p unknown"); 100 break; 101 case RQT_INIT_VER_CSC: 102 sprintf(rsp->str_data[0], "%s", "c unknown"); 103 break; 104 default: 105 return -EINVAL; 106 } 107 108 send_rsp(rsp); 109 return true; 110 } 111 112 static int process_rqt_cmd(const struct rqt_box *rqt) 113 { 114 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 115 memset(rsp, 0, sizeof(struct rsp_box)); 116 117 rsp->rsp = rqt->rqt; 118 rsp->rsp_data = rqt->rqt_data; 119 120 switch (rqt->rqt_data) { 121 case RQT_CMD_REBOOT: 122 debug("TARGET RESET\n"); 123 send_rsp(rsp); 124 g_dnl_unregister(); 125 dfu_free_entities(); 126 run_command("reset", 0); 127 break; 128 case RQT_CMD_POWEROFF: 129 case RQT_CMD_EFSCLEAR: 130 send_rsp(rsp); 131 default: 132 printf("Command not supported -> cmd: %d\n", rqt->rqt_data); 133 return -EINVAL; 134 } 135 136 return true; 137 } 138 139 static long long int download_head(unsigned long long total, 140 unsigned int packet_size, 141 long long int *left, 142 int *cnt) 143 { 144 long long int rcv_cnt = 0, left_to_rcv, ret_rcv; 145 void *transfer_buffer = dfu_get_buf(); 146 void *buf = transfer_buffer; 147 int usb_pkt_cnt = 0, ret; 148 149 /* 150 * Files smaller than THOR_STORE_UNIT_SIZE (now 32 MiB) are stored on 151 * the medium. 152 * The packet response is sent on the purpose after successful data 153 * chunk write. There is a room for improvement when asynchronous write 154 * is performed. 155 */ 156 while (total - rcv_cnt >= packet_size) { 157 thor_set_dma(buf, packet_size); 158 buf += packet_size; 159 ret_rcv = thor_rx_data(); 160 if (ret_rcv < 0) 161 return ret_rcv; 162 rcv_cnt += ret_rcv; 163 debug("%d: RCV data count: %llu cnt: %d\n", usb_pkt_cnt, 164 rcv_cnt, *cnt); 165 166 if ((rcv_cnt % THOR_STORE_UNIT_SIZE) == 0) { 167 ret = dfu_write(dfu_get_entity(alt_setting_num), 168 transfer_buffer, THOR_STORE_UNIT_SIZE, 169 (*cnt)++); 170 if (ret) { 171 error("DFU write failed [%d] cnt: %d", 172 ret, *cnt); 173 return ret; 174 } 175 buf = transfer_buffer; 176 } 177 send_data_rsp(0, ++usb_pkt_cnt); 178 } 179 180 /* Calculate the amount of data to arrive from PC (in bytes) */ 181 left_to_rcv = total - rcv_cnt; 182 183 /* 184 * Calculate number of data already received. but not yet stored 185 * on the medium (they are smaller than THOR_STORE_UNIT_SIZE) 186 */ 187 *left = left_to_rcv + buf - transfer_buffer; 188 debug("%s: left: %llu left_to_rcv: %llu buf: 0x%p\n", __func__, 189 *left, left_to_rcv, buf); 190 191 if (left_to_rcv) { 192 thor_set_dma(buf, packet_size); 193 ret_rcv = thor_rx_data(); 194 if (ret_rcv < 0) 195 return ret_rcv; 196 rcv_cnt += ret_rcv; 197 send_data_rsp(0, ++usb_pkt_cnt); 198 } 199 200 debug("%s: %llu total: %llu cnt: %d\n", __func__, rcv_cnt, total, *cnt); 201 202 return rcv_cnt; 203 } 204 205 static int download_tail(long long int left, int cnt) 206 { 207 struct dfu_entity *dfu_entity = dfu_get_entity(alt_setting_num); 208 void *transfer_buffer = dfu_get_buf(); 209 int ret; 210 211 debug("%s: left: %llu cnt: %d\n", __func__, left, cnt); 212 213 if (left) { 214 ret = dfu_write(dfu_entity, transfer_buffer, left, cnt++); 215 if (ret) { 216 error("DFU write failed [%d]: left: %llu", ret, left); 217 return ret; 218 } 219 } 220 221 /* 222 * To store last "packet" or write file from buffer to filesystem 223 * DFU storage backend requires dfu_flush 224 * 225 * This also frees memory malloc'ed by dfu_get_buf(), so no explicit 226 * need fo call dfu_free_buf() is needed. 227 */ 228 ret = dfu_flush(dfu_entity, transfer_buffer, 0, cnt); 229 if (ret) 230 error("DFU flush failed!"); 231 232 return ret; 233 } 234 235 static long long int process_rqt_download(const struct rqt_box *rqt) 236 { 237 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 238 static long long int left, ret_head; 239 int file_type, ret = 0; 240 static int cnt; 241 242 memset(rsp, 0, sizeof(struct rsp_box)); 243 rsp->rsp = rqt->rqt; 244 rsp->rsp_data = rqt->rqt_data; 245 246 switch (rqt->rqt_data) { 247 case RQT_DL_INIT: 248 thor_file_size = rqt->int_data[0]; 249 debug("INIT: total %d bytes\n", rqt->int_data[0]); 250 break; 251 case RQT_DL_FILE_INFO: 252 file_type = rqt->int_data[0]; 253 if (file_type == FILE_TYPE_PIT) { 254 puts("PIT table file - not supported\n"); 255 rsp->ack = -ENOTSUPP; 256 ret = rsp->ack; 257 break; 258 } 259 260 thor_file_size = rqt->int_data[1]; 261 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE); 262 263 debug("INFO: name(%s, %d), size(%llu), type(%d)\n", 264 f_name, 0, thor_file_size, file_type); 265 266 rsp->int_data[0] = THOR_PACKET_SIZE; 267 268 alt_setting_num = dfu_get_alt(f_name); 269 if (alt_setting_num < 0) { 270 error("Alt setting [%d] to write not found!", 271 alt_setting_num); 272 rsp->ack = -ENODEV; 273 ret = rsp->ack; 274 } 275 break; 276 case RQT_DL_FILE_START: 277 send_rsp(rsp); 278 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE, 279 &left, &cnt); 280 if (ret_head < 0) { 281 left = 0; 282 cnt = 0; 283 } 284 return ret_head; 285 case RQT_DL_FILE_END: 286 debug("DL FILE_END\n"); 287 rsp->ack = download_tail(left, cnt); 288 ret = rsp->ack; 289 left = 0; 290 cnt = 0; 291 break; 292 case RQT_DL_EXIT: 293 debug("DL EXIT\n"); 294 break; 295 default: 296 error("Operation not supported: %d", rqt->rqt_data); 297 ret = -ENOTSUPP; 298 } 299 300 send_rsp(rsp); 301 return ret; 302 } 303 304 static int process_data(void) 305 { 306 ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box)); 307 int ret = -EINVAL; 308 309 memset(rqt, 0, sizeof(rqt)); 310 memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box)); 311 312 debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data); 313 314 switch (rqt->rqt) { 315 case RQT_INFO: 316 ret = process_rqt_info(rqt); 317 break; 318 case RQT_CMD: 319 ret = process_rqt_cmd(rqt); 320 break; 321 case RQT_DL: 322 ret = (int) process_rqt_download(rqt); 323 break; 324 case RQT_UL: 325 puts("RQT: UPLOAD not supported!\n"); 326 break; 327 default: 328 error("unknown request (%d)", rqt->rqt); 329 } 330 331 return ret; 332 } 333 334 /* ********************************************************** */ 335 /* THOR USB Function */ 336 /* ********************************************************** */ 337 338 static inline struct usb_endpoint_descriptor * 339 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, 340 struct usb_endpoint_descriptor *fs) 341 { 342 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 343 return hs; 344 return fs; 345 } 346 347 static struct usb_interface_descriptor thor_downloader_intf_data = { 348 .bLength = sizeof(thor_downloader_intf_data), 349 .bDescriptorType = USB_DT_INTERFACE, 350 351 .bNumEndpoints = 2, 352 .bInterfaceClass = USB_CLASS_CDC_DATA, 353 }; 354 355 static struct usb_endpoint_descriptor fs_in_desc = { 356 .bLength = USB_DT_ENDPOINT_SIZE, 357 .bDescriptorType = USB_DT_ENDPOINT, 358 359 .bEndpointAddress = USB_DIR_IN, 360 .bmAttributes = USB_ENDPOINT_XFER_BULK, 361 }; 362 363 static struct usb_endpoint_descriptor fs_out_desc = { 364 .bLength = USB_DT_ENDPOINT_SIZE, 365 .bDescriptorType = USB_DT_ENDPOINT, 366 367 .bEndpointAddress = USB_DIR_OUT, 368 .bmAttributes = USB_ENDPOINT_XFER_BULK, 369 }; 370 371 /* CDC configuration */ 372 static struct usb_interface_descriptor thor_downloader_intf_int = { 373 .bLength = sizeof(thor_downloader_intf_int), 374 .bDescriptorType = USB_DT_INTERFACE, 375 376 .bNumEndpoints = 1, 377 .bInterfaceClass = USB_CLASS_COMM, 378 /* 0x02 Abstract Line Control Model */ 379 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, 380 /* 0x01 Common AT commands */ 381 .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER, 382 }; 383 384 static struct usb_cdc_header_desc thor_downloader_cdc_header = { 385 .bLength = sizeof(thor_downloader_cdc_header), 386 .bDescriptorType = 0x24, /* CS_INTERFACE */ 387 .bDescriptorSubType = 0x00, 388 .bcdCDC = 0x0110, 389 }; 390 391 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = { 392 .bLength = sizeof(thor_downloader_cdc_call), 393 .bDescriptorType = 0x24, /* CS_INTERFACE */ 394 .bDescriptorSubType = 0x01, 395 .bmCapabilities = 0x00, 396 .bDataInterface = 0x01, 397 }; 398 399 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = { 400 .bLength = sizeof(thor_downloader_cdc_abstract), 401 .bDescriptorType = 0x24, /* CS_INTERFACE */ 402 .bDescriptorSubType = 0x02, 403 .bmCapabilities = 0x00, 404 }; 405 406 static struct usb_cdc_union_desc thor_downloader_cdc_union = { 407 .bLength = sizeof(thor_downloader_cdc_union), 408 .bDescriptorType = 0x24, /* CS_INTERFACE */ 409 .bDescriptorSubType = USB_CDC_UNION_TYPE, 410 }; 411 412 static struct usb_endpoint_descriptor fs_int_desc = { 413 .bLength = USB_DT_ENDPOINT_SIZE, 414 .bDescriptorType = USB_DT_ENDPOINT, 415 416 .bEndpointAddress = 3 | USB_DIR_IN, 417 .bmAttributes = USB_ENDPOINT_XFER_INT, 418 .wMaxPacketSize = __constant_cpu_to_le16(16), 419 420 .bInterval = 0x9, 421 }; 422 423 static struct usb_interface_assoc_descriptor 424 thor_iad_descriptor = { 425 .bLength = sizeof(thor_iad_descriptor), 426 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, 427 428 .bFirstInterface = 0, 429 .bInterfaceCount = 2, /* control + data */ 430 .bFunctionClass = USB_CLASS_COMM, 431 .bFunctionSubClass = USB_CDC_SUBCLASS_ACM, 432 .bFunctionProtocol = USB_CDC_PROTO_NONE, 433 }; 434 435 static struct usb_endpoint_descriptor hs_in_desc = { 436 .bLength = USB_DT_ENDPOINT_SIZE, 437 .bDescriptorType = USB_DT_ENDPOINT, 438 439 .bmAttributes = USB_ENDPOINT_XFER_BULK, 440 .wMaxPacketSize = __constant_cpu_to_le16(512), 441 }; 442 443 static struct usb_endpoint_descriptor hs_out_desc = { 444 .bLength = USB_DT_ENDPOINT_SIZE, 445 .bDescriptorType = USB_DT_ENDPOINT, 446 447 .bmAttributes = USB_ENDPOINT_XFER_BULK, 448 .wMaxPacketSize = __constant_cpu_to_le16(512), 449 }; 450 451 static struct usb_endpoint_descriptor hs_int_desc = { 452 .bLength = USB_DT_ENDPOINT_SIZE, 453 .bDescriptorType = USB_DT_ENDPOINT, 454 455 .bmAttributes = USB_ENDPOINT_XFER_INT, 456 .wMaxPacketSize = __constant_cpu_to_le16(16), 457 458 .bInterval = 0x9, 459 }; 460 461 static struct usb_qualifier_descriptor dev_qualifier = { 462 .bLength = sizeof(dev_qualifier), 463 .bDescriptorType = USB_DT_DEVICE_QUALIFIER, 464 465 .bcdUSB = __constant_cpu_to_le16(0x0200), 466 .bDeviceClass = USB_CLASS_VENDOR_SPEC, 467 468 .bNumConfigurations = 2, 469 }; 470 471 /* 472 * This attribute vendor descriptor is necessary for correct operation with 473 * Windows version of THOR download program 474 * 475 * It prevents windows driver from sending zero lenght packet (ZLP) after 476 * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb 477 */ 478 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = { 479 .bLength = sizeof(thor_downloader_cdc_av), 480 .bDescriptorType = 0x24, 481 .bDescriptorSubType = 0x80, 482 .DAUType = 0x0002, 483 .DAULength = 0x0001, 484 .DAUValue = 0x00, 485 }; 486 487 static const struct usb_descriptor_header *hs_thor_downloader_function[] = { 488 (struct usb_descriptor_header *)&thor_iad_descriptor, 489 490 (struct usb_descriptor_header *)&thor_downloader_intf_int, 491 (struct usb_descriptor_header *)&thor_downloader_cdc_header, 492 (struct usb_descriptor_header *)&thor_downloader_cdc_call, 493 (struct usb_descriptor_header *)&thor_downloader_cdc_abstract, 494 (struct usb_descriptor_header *)&thor_downloader_cdc_union, 495 (struct usb_descriptor_header *)&hs_int_desc, 496 497 (struct usb_descriptor_header *)&thor_downloader_intf_data, 498 (struct usb_descriptor_header *)&thor_downloader_cdc_av, 499 (struct usb_descriptor_header *)&hs_in_desc, 500 (struct usb_descriptor_header *)&hs_out_desc, 501 NULL, 502 }; 503 504 /*-------------------------------------------------------------------------*/ 505 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 506 { 507 struct usb_request *req; 508 509 req = usb_ep_alloc_request(ep, 0); 510 if (!req) 511 return req; 512 513 req->length = length; 514 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 515 if (!req->buf) { 516 usb_ep_free_request(ep, req); 517 req = NULL; 518 } 519 520 return req; 521 } 522 523 static int thor_rx_data(void) 524 { 525 struct thor_dev *dev = thor_func->dev; 526 int data_to_rx, tmp, status; 527 528 data_to_rx = dev->out_req->length; 529 tmp = data_to_rx; 530 do { 531 dev->out_req->length = data_to_rx; 532 debug("dev->out_req->length:%d dev->rxdata:%d\n", 533 dev->out_req->length, dev->rxdata); 534 535 status = usb_ep_queue(dev->out_ep, dev->out_req, 0); 536 if (status) { 537 error("kill %s: resubmit %d bytes --> %d", 538 dev->out_ep->name, dev->out_req->length, status); 539 usb_ep_set_halt(dev->out_ep); 540 return -EAGAIN; 541 } 542 543 while (!dev->rxdata) { 544 usb_gadget_handle_interrupts(); 545 if (ctrlc()) 546 return -1; 547 } 548 dev->rxdata = 0; 549 data_to_rx -= dev->out_req->actual; 550 } while (data_to_rx); 551 552 return tmp; 553 } 554 555 static void thor_tx_data(unsigned char *data, int len) 556 { 557 struct thor_dev *dev = thor_func->dev; 558 unsigned char *ptr = dev->in_req->buf; 559 int status; 560 561 memset(ptr, 0, len); 562 memcpy(ptr, data, len); 563 564 dev->in_req->length = len; 565 566 debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__, 567 dev->in_req->length, sizeof(data)); 568 569 status = usb_ep_queue(dev->in_ep, dev->in_req, 0); 570 if (status) { 571 error("kill %s: resubmit %d bytes --> %d", 572 dev->in_ep->name, dev->in_req->length, status); 573 usb_ep_set_halt(dev->in_ep); 574 } 575 576 /* Wait until tx interrupt received */ 577 while (!dev->txdata) 578 usb_gadget_handle_interrupts(); 579 580 dev->txdata = 0; 581 } 582 583 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req) 584 { 585 struct thor_dev *dev = thor_func->dev; 586 int status = req->status; 587 588 debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req); 589 switch (status) { 590 case 0: 591 if (ep == dev->out_ep) 592 dev->rxdata = 1; 593 else 594 dev->txdata = 1; 595 596 break; 597 598 /* this endpoint is normally active while we're configured */ 599 case -ECONNABORTED: /* hardware forced ep reset */ 600 case -ECONNRESET: /* request dequeued */ 601 case -ESHUTDOWN: /* disconnect from host */ 602 case -EREMOTEIO: /* short read */ 603 case -EOVERFLOW: 604 error("ERROR:%d", status); 605 break; 606 } 607 608 debug("%s complete --> %d, %d/%d\n", ep->name, 609 status, req->actual, req->length); 610 } 611 612 static struct usb_request *thor_start_ep(struct usb_ep *ep) 613 { 614 struct usb_request *req; 615 616 req = alloc_ep_req(ep, THOR_PACKET_SIZE); 617 debug("%s: ep:%p req:%p\n", __func__, ep, req); 618 619 if (!req) 620 return NULL; 621 622 memset(req->buf, 0, req->length); 623 req->complete = thor_rx_tx_complete; 624 625 return req; 626 } 627 628 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req) 629 { 630 if (req->status || req->actual != req->length) 631 debug("setup complete --> %d, %d/%d\n", 632 req->status, req->actual, req->length); 633 } 634 635 static int 636 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 637 { 638 struct thor_dev *dev = thor_func->dev; 639 struct usb_request *req = dev->req; 640 struct usb_gadget *gadget = dev->gadget; 641 int value = 0; 642 643 u16 len = le16_to_cpu(ctrl->wLength); 644 645 debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n", 646 ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex, 647 ctrl->wLength); 648 649 switch (ctrl->bRequest) { 650 case USB_CDC_REQ_SET_CONTROL_LINE_STATE: 651 value = 0; 652 break; 653 case USB_CDC_REQ_SET_LINE_CODING: 654 value = len; 655 /* Line Coding set done = configuration done */ 656 thor_func->dev->configuration_done = 1; 657 break; 658 659 default: 660 error("thor_setup: unknown request: %d", ctrl->bRequest); 661 } 662 663 if (value >= 0) { 664 req->length = value; 665 req->zero = value < len; 666 value = usb_ep_queue(gadget->ep0, req, 0); 667 if (value < 0) { 668 debug("%s: ep_queue: %d\n", __func__, value); 669 req->status = 0; 670 } 671 } 672 673 return value; 674 } 675 676 /* Specific to the THOR protocol */ 677 static void thor_set_dma(void *addr, int len) 678 { 679 struct thor_dev *dev = thor_func->dev; 680 681 debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req); 682 debug("addr:%p, len:%d\n", addr, len); 683 684 dev->out_req->buf = addr; 685 dev->out_req->length = len; 686 } 687 688 int thor_init(void) 689 { 690 struct thor_dev *dev = thor_func->dev; 691 692 /* Wait for a device enumeration and configuration settings */ 693 debug("THOR enumeration/configuration setting....\n"); 694 while (!dev->configuration_done) 695 usb_gadget_handle_interrupts(); 696 697 thor_set_dma(thor_rx_data_buf, strlen("THOR")); 698 /* detect the download request from Host PC */ 699 if (thor_rx_data() < 0) { 700 printf("%s: Data not received!\n", __func__); 701 return -1; 702 } 703 704 if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) { 705 puts("Download request from the Host PC\n"); 706 udelay(30 * 1000); /* 30 ms */ 707 708 strcpy((char *)thor_tx_data_buf, "ROHT"); 709 thor_tx_data(thor_tx_data_buf, strlen("ROHT")); 710 } else { 711 puts("Wrong reply information\n"); 712 return -1; 713 } 714 715 return 0; 716 } 717 718 int thor_handle(void) 719 { 720 int ret; 721 722 /* receive the data from Host PC */ 723 while (1) { 724 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box)); 725 ret = thor_rx_data(); 726 727 if (ret > 0) { 728 ret = process_data(); 729 if (ret < 0) 730 return ret; 731 } else { 732 printf("%s: No data received!\n", __func__); 733 break; 734 } 735 } 736 737 return 0; 738 } 739 740 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f) 741 { 742 struct usb_gadget *gadget = c->cdev->gadget; 743 struct f_thor *f_thor = func_to_thor(f); 744 struct thor_dev *dev; 745 struct usb_ep *ep; 746 int status; 747 748 thor_func = f_thor; 749 dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev)); 750 if (!dev) 751 return -ENOMEM; 752 753 memset(dev, 0, sizeof(*dev)); 754 dev->gadget = gadget; 755 f_thor->dev = dev; 756 757 debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n", 758 __func__, c, f); 759 debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev); 760 761 /* EP0 */ 762 /* preallocate control response and buffer */ 763 dev->req = usb_ep_alloc_request(gadget->ep0, 0); 764 if (!dev->req) { 765 status = -ENOMEM; 766 goto fail; 767 } 768 dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, 769 gadget->ep0->maxpacket); 770 if (!dev->req->buf) { 771 status = -ENOMEM; 772 goto fail; 773 } 774 775 dev->req->complete = thor_setup_complete; 776 777 /* DYNAMIC interface numbers assignments */ 778 status = usb_interface_id(c, f); 779 780 if (status < 0) 781 goto fail; 782 783 thor_downloader_intf_int.bInterfaceNumber = status; 784 thor_downloader_cdc_union.bMasterInterface0 = status; 785 786 status = usb_interface_id(c, f); 787 788 if (status < 0) 789 goto fail; 790 791 thor_downloader_intf_data.bInterfaceNumber = status; 792 thor_downloader_cdc_union.bSlaveInterface0 = status; 793 794 /* allocate instance-specific endpoints */ 795 ep = usb_ep_autoconfig(gadget, &fs_in_desc); 796 if (!ep) { 797 status = -ENODEV; 798 goto fail; 799 } 800 801 if (gadget_is_dualspeed(gadget)) { 802 hs_in_desc.bEndpointAddress = 803 fs_in_desc.bEndpointAddress; 804 } 805 806 dev->in_ep = ep; /* Store IN EP for enabling @ setup */ 807 808 ep = usb_ep_autoconfig(gadget, &fs_out_desc); 809 if (!ep) { 810 status = -ENODEV; 811 goto fail; 812 } 813 814 if (gadget_is_dualspeed(gadget)) 815 hs_out_desc.bEndpointAddress = 816 fs_out_desc.bEndpointAddress; 817 818 dev->out_ep = ep; /* Store OUT EP for enabling @ setup */ 819 820 ep = usb_ep_autoconfig(gadget, &fs_int_desc); 821 if (!ep) { 822 status = -ENODEV; 823 goto fail; 824 } 825 826 dev->int_ep = ep; 827 828 if (gadget_is_dualspeed(gadget)) { 829 hs_int_desc.bEndpointAddress = 830 fs_int_desc.bEndpointAddress; 831 832 f->hs_descriptors = (struct usb_descriptor_header **) 833 &hs_thor_downloader_function; 834 835 if (!f->hs_descriptors) 836 goto fail; 837 } 838 839 debug("%s: out_ep:%p out_req:%p\n", __func__, 840 dev->out_ep, dev->out_req); 841 842 return 0; 843 844 fail: 845 free(dev); 846 return status; 847 } 848 849 static void free_ep_req(struct usb_ep *ep, struct usb_request *req) 850 { 851 free(req->buf); 852 usb_ep_free_request(ep, req); 853 } 854 855 static void thor_unbind(struct usb_configuration *c, struct usb_function *f) 856 { 857 struct f_thor *f_thor = func_to_thor(f); 858 struct thor_dev *dev = f_thor->dev; 859 860 free(dev); 861 memset(thor_func, 0, sizeof(*thor_func)); 862 thor_func = NULL; 863 } 864 865 static void thor_func_disable(struct usb_function *f) 866 { 867 struct f_thor *f_thor = func_to_thor(f); 868 struct thor_dev *dev = f_thor->dev; 869 870 debug("%s:\n", __func__); 871 872 /* Avoid freeing memory when ep is still claimed */ 873 if (dev->in_ep->driver_data) { 874 free_ep_req(dev->in_ep, dev->in_req); 875 usb_ep_disable(dev->in_ep); 876 dev->in_ep->driver_data = NULL; 877 } 878 879 if (dev->out_ep->driver_data) { 880 dev->out_req->buf = NULL; 881 usb_ep_free_request(dev->out_ep, dev->out_req); 882 usb_ep_disable(dev->out_ep); 883 dev->out_ep->driver_data = NULL; 884 } 885 886 if (dev->int_ep->driver_data) { 887 usb_ep_disable(dev->int_ep); 888 dev->int_ep->driver_data = NULL; 889 } 890 } 891 892 static int thor_eps_setup(struct usb_function *f) 893 { 894 struct usb_composite_dev *cdev = f->config->cdev; 895 struct usb_gadget *gadget = cdev->gadget; 896 struct thor_dev *dev = thor_func->dev; 897 struct usb_endpoint_descriptor *d; 898 struct usb_request *req; 899 struct usb_ep *ep; 900 int result; 901 902 ep = dev->in_ep; 903 d = ep_desc(gadget, &hs_in_desc, &fs_in_desc); 904 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 905 906 result = usb_ep_enable(ep, d); 907 if (result) 908 goto exit; 909 910 ep->driver_data = cdev; /* claim */ 911 req = thor_start_ep(ep); 912 if (!req) { 913 usb_ep_disable(ep); 914 result = -EIO; 915 goto exit; 916 } 917 918 dev->in_req = req; 919 ep = dev->out_ep; 920 d = ep_desc(gadget, &hs_out_desc, &fs_out_desc); 921 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 922 923 result = usb_ep_enable(ep, d); 924 if (result) 925 goto exit; 926 927 ep->driver_data = cdev; /* claim */ 928 req = thor_start_ep(ep); 929 if (!req) { 930 usb_ep_disable(ep); 931 result = -EIO; 932 goto exit; 933 } 934 935 dev->out_req = req; 936 /* ACM control EP */ 937 ep = dev->int_ep; 938 ep->driver_data = cdev; /* claim */ 939 940 exit: 941 return result; 942 } 943 944 static int thor_func_set_alt(struct usb_function *f, 945 unsigned intf, unsigned alt) 946 { 947 struct thor_dev *dev = thor_func->dev; 948 int result; 949 950 debug("%s: func: %s intf: %d alt: %d\n", 951 __func__, f->name, intf, alt); 952 953 switch (intf) { 954 case 0: 955 debug("ACM INTR interface\n"); 956 break; 957 case 1: 958 debug("Communication Data interface\n"); 959 result = thor_eps_setup(f); 960 if (result) 961 error("%s: EPs setup failed!", __func__); 962 dev->configuration_done = 1; 963 break; 964 } 965 966 return 0; 967 } 968 969 static int thor_func_init(struct usb_configuration *c) 970 { 971 struct f_thor *f_thor; 972 int status; 973 974 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 975 976 f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor)); 977 if (!f_thor) 978 return -ENOMEM; 979 980 memset(f_thor, 0, sizeof(*f_thor)); 981 982 f_thor->usb_function.name = "f_thor"; 983 f_thor->usb_function.bind = thor_func_bind; 984 f_thor->usb_function.unbind = thor_unbind; 985 f_thor->usb_function.setup = thor_func_setup; 986 f_thor->usb_function.set_alt = thor_func_set_alt; 987 f_thor->usb_function.disable = thor_func_disable; 988 989 status = usb_add_function(c, &f_thor->usb_function); 990 if (status) 991 free(f_thor); 992 993 return status; 994 } 995 996 int thor_add(struct usb_configuration *c) 997 { 998 debug("%s:\n", __func__); 999 return thor_func_init(c); 1000 } 1001 1002 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add); 1003