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 <memalign.h> 22 #include <version.h> 23 #include <linux/usb/ch9.h> 24 #include <linux/usb/gadget.h> 25 #include <linux/usb/composite.h> 26 #include <linux/usb/cdc.h> 27 #include <g_dnl.h> 28 #include <dfu.h> 29 30 #include "f_thor.h" 31 32 static void thor_tx_data(unsigned char *data, int len); 33 static void thor_set_dma(void *addr, int len); 34 static int thor_rx_data(void); 35 36 static struct f_thor *thor_func; 37 static inline struct f_thor *func_to_thor(struct usb_function *f) 38 { 39 return container_of(f, struct f_thor, usb_function); 40 } 41 42 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_tx_data_buf, 43 sizeof(struct rsp_box)); 44 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_rx_data_buf, 45 sizeof(struct rqt_box)); 46 47 /* ********************************************************** */ 48 /* THOR protocol - transmission handling */ 49 /* ********************************************************** */ 50 DEFINE_CACHE_ALIGN_BUFFER(char, f_name, F_NAME_BUF_SIZE); 51 static unsigned long long int thor_file_size; 52 static int alt_setting_num; 53 54 static void send_rsp(const struct rsp_box *rsp) 55 { 56 memcpy(thor_tx_data_buf, rsp, sizeof(struct rsp_box)); 57 thor_tx_data(thor_tx_data_buf, sizeof(struct rsp_box)); 58 59 debug("-RSP: %d, %d\n", rsp->rsp, rsp->rsp_data); 60 } 61 62 static void send_data_rsp(s32 ack, s32 count) 63 { 64 ALLOC_CACHE_ALIGN_BUFFER(struct data_rsp_box, rsp, 65 sizeof(struct data_rsp_box)); 66 67 rsp->ack = ack; 68 rsp->count = count; 69 70 memcpy(thor_tx_data_buf, rsp, sizeof(struct data_rsp_box)); 71 thor_tx_data(thor_tx_data_buf, sizeof(struct data_rsp_box)); 72 73 debug("-DATA RSP: %d, %d\n", ack, count); 74 } 75 76 static int process_rqt_info(const struct rqt_box *rqt) 77 { 78 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 79 memset(rsp, 0, sizeof(struct rsp_box)); 80 81 rsp->rsp = rqt->rqt; 82 rsp->rsp_data = rqt->rqt_data; 83 84 switch (rqt->rqt_data) { 85 case RQT_INFO_VER_PROTOCOL: 86 rsp->int_data[0] = VER_PROTOCOL_MAJOR; 87 rsp->int_data[1] = VER_PROTOCOL_MINOR; 88 break; 89 case RQT_INIT_VER_HW: 90 snprintf(rsp->str_data[0], sizeof(rsp->str_data[0]), 91 "%x", checkboard()); 92 break; 93 case RQT_INIT_VER_BOOT: 94 sprintf(rsp->str_data[0], "%s", U_BOOT_VERSION); 95 break; 96 case RQT_INIT_VER_KERNEL: 97 sprintf(rsp->str_data[0], "%s", "k unknown"); 98 break; 99 case RQT_INIT_VER_PLATFORM: 100 sprintf(rsp->str_data[0], "%s", "p unknown"); 101 break; 102 case RQT_INIT_VER_CSC: 103 sprintf(rsp->str_data[0], "%s", "c unknown"); 104 break; 105 default: 106 return -EINVAL; 107 } 108 109 send_rsp(rsp); 110 return true; 111 } 112 113 static int process_rqt_cmd(const struct rqt_box *rqt) 114 { 115 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 116 memset(rsp, 0, sizeof(struct rsp_box)); 117 118 rsp->rsp = rqt->rqt; 119 rsp->rsp_data = rqt->rqt_data; 120 121 switch (rqt->rqt_data) { 122 case RQT_CMD_REBOOT: 123 debug("TARGET RESET\n"); 124 send_rsp(rsp); 125 g_dnl_unregister(); 126 dfu_free_entities(); 127 #ifdef CONFIG_THOR_RESET_OFF 128 return RESET_DONE; 129 #endif 130 run_command("reset", 0); 131 break; 132 case RQT_CMD_POWEROFF: 133 case RQT_CMD_EFSCLEAR: 134 send_rsp(rsp); 135 default: 136 printf("Command not supported -> cmd: %d\n", rqt->rqt_data); 137 return -EINVAL; 138 } 139 140 return true; 141 } 142 143 static long long int download_head(unsigned long long total, 144 unsigned int packet_size, 145 long long int *left, 146 int *cnt) 147 { 148 long long int rcv_cnt = 0, left_to_rcv, ret_rcv; 149 struct dfu_entity *dfu_entity = dfu_get_entity(alt_setting_num); 150 void *transfer_buffer = dfu_get_buf(dfu_entity); 151 void *buf = transfer_buffer; 152 int usb_pkt_cnt = 0, ret; 153 154 /* 155 * Files smaller than THOR_STORE_UNIT_SIZE (now 32 MiB) are stored on 156 * the medium. 157 * The packet response is sent on the purpose after successful data 158 * chunk write. There is a room for improvement when asynchronous write 159 * is performed. 160 */ 161 while (total - rcv_cnt >= packet_size) { 162 thor_set_dma(buf, packet_size); 163 buf += packet_size; 164 ret_rcv = thor_rx_data(); 165 if (ret_rcv < 0) 166 return ret_rcv; 167 rcv_cnt += ret_rcv; 168 debug("%d: RCV data count: %llu cnt: %d\n", usb_pkt_cnt, 169 rcv_cnt, *cnt); 170 171 if ((rcv_cnt % THOR_STORE_UNIT_SIZE) == 0) { 172 ret = dfu_write(dfu_get_entity(alt_setting_num), 173 transfer_buffer, THOR_STORE_UNIT_SIZE, 174 (*cnt)++); 175 if (ret) { 176 error("DFU write failed [%d] cnt: %d", 177 ret, *cnt); 178 return ret; 179 } 180 buf = transfer_buffer; 181 } 182 send_data_rsp(0, ++usb_pkt_cnt); 183 } 184 185 /* Calculate the amount of data to arrive from PC (in bytes) */ 186 left_to_rcv = total - rcv_cnt; 187 188 /* 189 * Calculate number of data already received. but not yet stored 190 * on the medium (they are smaller than THOR_STORE_UNIT_SIZE) 191 */ 192 *left = left_to_rcv + buf - transfer_buffer; 193 debug("%s: left: %llu left_to_rcv: %llu buf: 0x%p\n", __func__, 194 *left, left_to_rcv, buf); 195 196 if (left_to_rcv) { 197 thor_set_dma(buf, packet_size); 198 ret_rcv = thor_rx_data(); 199 if (ret_rcv < 0) 200 return ret_rcv; 201 rcv_cnt += ret_rcv; 202 send_data_rsp(0, ++usb_pkt_cnt); 203 } 204 205 debug("%s: %llu total: %llu cnt: %d\n", __func__, rcv_cnt, total, *cnt); 206 207 return rcv_cnt; 208 } 209 210 static int download_tail(long long int left, int cnt) 211 { 212 struct dfu_entity *dfu_entity; 213 void *transfer_buffer; 214 int ret; 215 216 debug("%s: left: %llu cnt: %d\n", __func__, left, cnt); 217 218 dfu_entity = dfu_get_entity(alt_setting_num); 219 if (!dfu_entity) { 220 error("Alt setting: %d entity not found!\n", alt_setting_num); 221 return -ENOENT; 222 } 223 224 transfer_buffer = dfu_get_buf(dfu_entity); 225 if (!transfer_buffer) { 226 error("Transfer buffer not allocated!"); 227 return -ENXIO; 228 } 229 230 if (left) { 231 ret = dfu_write(dfu_entity, transfer_buffer, left, cnt++); 232 if (ret) { 233 error("DFU write failed [%d]: left: %llu", ret, left); 234 return ret; 235 } 236 } 237 238 /* 239 * To store last "packet" or write file from buffer to filesystem 240 * DFU storage backend requires dfu_flush 241 * 242 * This also frees memory malloc'ed by dfu_get_buf(), so no explicit 243 * need fo call dfu_free_buf() is needed. 244 */ 245 ret = dfu_flush(dfu_entity, transfer_buffer, 0, cnt); 246 if (ret) 247 error("DFU flush failed!"); 248 249 return ret; 250 } 251 252 static long long int process_rqt_download(const struct rqt_box *rqt) 253 { 254 ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box)); 255 static long long int left, ret_head; 256 int file_type, ret = 0; 257 static int cnt; 258 259 memset(rsp, 0, sizeof(struct rsp_box)); 260 rsp->rsp = rqt->rqt; 261 rsp->rsp_data = rqt->rqt_data; 262 263 switch (rqt->rqt_data) { 264 case RQT_DL_INIT: 265 thor_file_size = rqt->int_data[0]; 266 debug("INIT: total %d bytes\n", rqt->int_data[0]); 267 break; 268 case RQT_DL_FILE_INFO: 269 file_type = rqt->int_data[0]; 270 if (file_type == FILE_TYPE_PIT) { 271 puts("PIT table file - not supported\n"); 272 rsp->ack = -ENOTSUPP; 273 ret = rsp->ack; 274 break; 275 } 276 277 thor_file_size = rqt->int_data[1]; 278 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE); 279 280 debug("INFO: name(%s, %d), size(%llu), type(%d)\n", 281 f_name, 0, thor_file_size, file_type); 282 283 rsp->int_data[0] = THOR_PACKET_SIZE; 284 285 alt_setting_num = dfu_get_alt(f_name); 286 if (alt_setting_num < 0) { 287 error("Alt setting [%d] to write not found!", 288 alt_setting_num); 289 rsp->ack = -ENODEV; 290 ret = rsp->ack; 291 } 292 break; 293 case RQT_DL_FILE_START: 294 send_rsp(rsp); 295 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE, 296 &left, &cnt); 297 if (ret_head < 0) { 298 left = 0; 299 cnt = 0; 300 } 301 return ret_head; 302 case RQT_DL_FILE_END: 303 debug("DL FILE_END\n"); 304 rsp->ack = download_tail(left, cnt); 305 ret = rsp->ack; 306 left = 0; 307 cnt = 0; 308 break; 309 case RQT_DL_EXIT: 310 debug("DL EXIT\n"); 311 break; 312 default: 313 error("Operation not supported: %d", rqt->rqt_data); 314 ret = -ENOTSUPP; 315 } 316 317 send_rsp(rsp); 318 return ret; 319 } 320 321 static int process_data(void) 322 { 323 ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box)); 324 int ret = -EINVAL; 325 326 memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box)); 327 328 debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data); 329 330 switch (rqt->rqt) { 331 case RQT_INFO: 332 ret = process_rqt_info(rqt); 333 break; 334 case RQT_CMD: 335 ret = process_rqt_cmd(rqt); 336 break; 337 case RQT_DL: 338 ret = (int) process_rqt_download(rqt); 339 break; 340 case RQT_UL: 341 puts("RQT: UPLOAD not supported!\n"); 342 break; 343 default: 344 error("unknown request (%d)", rqt->rqt); 345 } 346 347 return ret; 348 } 349 350 /* ********************************************************** */ 351 /* THOR USB Function */ 352 /* ********************************************************** */ 353 354 static inline struct usb_endpoint_descriptor * 355 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, 356 struct usb_endpoint_descriptor *fs) 357 { 358 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 359 return hs; 360 return fs; 361 } 362 363 static struct usb_interface_descriptor thor_downloader_intf_data = { 364 .bLength = sizeof(thor_downloader_intf_data), 365 .bDescriptorType = USB_DT_INTERFACE, 366 367 .bNumEndpoints = 2, 368 .bInterfaceClass = USB_CLASS_CDC_DATA, 369 }; 370 371 static struct usb_endpoint_descriptor fs_in_desc = { 372 .bLength = USB_DT_ENDPOINT_SIZE, 373 .bDescriptorType = USB_DT_ENDPOINT, 374 375 .bEndpointAddress = USB_DIR_IN, 376 .bmAttributes = USB_ENDPOINT_XFER_BULK, 377 }; 378 379 static struct usb_endpoint_descriptor fs_out_desc = { 380 .bLength = USB_DT_ENDPOINT_SIZE, 381 .bDescriptorType = USB_DT_ENDPOINT, 382 383 .bEndpointAddress = USB_DIR_OUT, 384 .bmAttributes = USB_ENDPOINT_XFER_BULK, 385 }; 386 387 /* CDC configuration */ 388 static struct usb_interface_descriptor thor_downloader_intf_int = { 389 .bLength = sizeof(thor_downloader_intf_int), 390 .bDescriptorType = USB_DT_INTERFACE, 391 392 .bNumEndpoints = 1, 393 .bInterfaceClass = USB_CLASS_COMM, 394 /* 0x02 Abstract Line Control Model */ 395 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, 396 /* 0x01 Common AT commands */ 397 .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER, 398 }; 399 400 static struct usb_cdc_header_desc thor_downloader_cdc_header = { 401 .bLength = sizeof(thor_downloader_cdc_header), 402 .bDescriptorType = 0x24, /* CS_INTERFACE */ 403 .bDescriptorSubType = 0x00, 404 .bcdCDC = 0x0110, 405 }; 406 407 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = { 408 .bLength = sizeof(thor_downloader_cdc_call), 409 .bDescriptorType = 0x24, /* CS_INTERFACE */ 410 .bDescriptorSubType = 0x01, 411 .bmCapabilities = 0x00, 412 .bDataInterface = 0x01, 413 }; 414 415 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = { 416 .bLength = sizeof(thor_downloader_cdc_abstract), 417 .bDescriptorType = 0x24, /* CS_INTERFACE */ 418 .bDescriptorSubType = 0x02, 419 .bmCapabilities = 0x00, 420 }; 421 422 static struct usb_cdc_union_desc thor_downloader_cdc_union = { 423 .bLength = sizeof(thor_downloader_cdc_union), 424 .bDescriptorType = 0x24, /* CS_INTERFACE */ 425 .bDescriptorSubType = USB_CDC_UNION_TYPE, 426 }; 427 428 static struct usb_endpoint_descriptor fs_int_desc = { 429 .bLength = USB_DT_ENDPOINT_SIZE, 430 .bDescriptorType = USB_DT_ENDPOINT, 431 432 .bEndpointAddress = 3 | USB_DIR_IN, 433 .bmAttributes = USB_ENDPOINT_XFER_INT, 434 .wMaxPacketSize = __constant_cpu_to_le16(16), 435 436 .bInterval = 0x9, 437 }; 438 439 static struct usb_interface_assoc_descriptor 440 thor_iad_descriptor = { 441 .bLength = sizeof(thor_iad_descriptor), 442 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, 443 444 .bFirstInterface = 0, 445 .bInterfaceCount = 2, /* control + data */ 446 .bFunctionClass = USB_CLASS_COMM, 447 .bFunctionSubClass = USB_CDC_SUBCLASS_ACM, 448 .bFunctionProtocol = USB_CDC_PROTO_NONE, 449 }; 450 451 static struct usb_endpoint_descriptor hs_in_desc = { 452 .bLength = USB_DT_ENDPOINT_SIZE, 453 .bDescriptorType = USB_DT_ENDPOINT, 454 455 .bmAttributes = USB_ENDPOINT_XFER_BULK, 456 .wMaxPacketSize = __constant_cpu_to_le16(512), 457 }; 458 459 static struct usb_endpoint_descriptor hs_out_desc = { 460 .bLength = USB_DT_ENDPOINT_SIZE, 461 .bDescriptorType = USB_DT_ENDPOINT, 462 463 .bmAttributes = USB_ENDPOINT_XFER_BULK, 464 .wMaxPacketSize = __constant_cpu_to_le16(512), 465 }; 466 467 static struct usb_endpoint_descriptor hs_int_desc = { 468 .bLength = USB_DT_ENDPOINT_SIZE, 469 .bDescriptorType = USB_DT_ENDPOINT, 470 471 .bmAttributes = USB_ENDPOINT_XFER_INT, 472 .wMaxPacketSize = __constant_cpu_to_le16(16), 473 474 .bInterval = 0x9, 475 }; 476 477 /* 478 * This attribute vendor descriptor is necessary for correct operation with 479 * Windows version of THOR download program 480 * 481 * It prevents windows driver from sending zero lenght packet (ZLP) after 482 * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb 483 */ 484 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = { 485 .bLength = sizeof(thor_downloader_cdc_av), 486 .bDescriptorType = 0x24, 487 .bDescriptorSubType = 0x80, 488 .DAUType = 0x0002, 489 .DAULength = 0x0001, 490 .DAUValue = 0x00, 491 }; 492 493 static const struct usb_descriptor_header *hs_thor_downloader_function[] = { 494 (struct usb_descriptor_header *)&thor_iad_descriptor, 495 496 (struct usb_descriptor_header *)&thor_downloader_intf_int, 497 (struct usb_descriptor_header *)&thor_downloader_cdc_header, 498 (struct usb_descriptor_header *)&thor_downloader_cdc_call, 499 (struct usb_descriptor_header *)&thor_downloader_cdc_abstract, 500 (struct usb_descriptor_header *)&thor_downloader_cdc_union, 501 (struct usb_descriptor_header *)&hs_int_desc, 502 503 (struct usb_descriptor_header *)&thor_downloader_intf_data, 504 (struct usb_descriptor_header *)&thor_downloader_cdc_av, 505 (struct usb_descriptor_header *)&hs_in_desc, 506 (struct usb_descriptor_header *)&hs_out_desc, 507 NULL, 508 }; 509 510 /*-------------------------------------------------------------------------*/ 511 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 512 { 513 struct usb_request *req; 514 515 req = usb_ep_alloc_request(ep, 0); 516 if (!req) 517 return req; 518 519 req->length = length; 520 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 521 if (!req->buf) { 522 usb_ep_free_request(ep, req); 523 req = NULL; 524 } 525 526 return req; 527 } 528 529 static int thor_rx_data(void) 530 { 531 struct thor_dev *dev = thor_func->dev; 532 int data_to_rx, tmp, status; 533 534 data_to_rx = dev->out_req->length; 535 tmp = data_to_rx; 536 do { 537 dev->out_req->length = data_to_rx; 538 debug("dev->out_req->length:%d dev->rxdata:%d\n", 539 dev->out_req->length, dev->rxdata); 540 541 status = usb_ep_queue(dev->out_ep, dev->out_req, 0); 542 if (status) { 543 error("kill %s: resubmit %d bytes --> %d", 544 dev->out_ep->name, dev->out_req->length, status); 545 usb_ep_set_halt(dev->out_ep); 546 return -EAGAIN; 547 } 548 549 while (!dev->rxdata) { 550 usb_gadget_handle_interrupts(0); 551 if (ctrlc()) 552 return -1; 553 } 554 dev->rxdata = 0; 555 data_to_rx -= dev->out_req->actual; 556 } while (data_to_rx); 557 558 return tmp; 559 } 560 561 static void thor_tx_data(unsigned char *data, int len) 562 { 563 struct thor_dev *dev = thor_func->dev; 564 unsigned char *ptr = dev->in_req->buf; 565 int status; 566 567 memset(ptr, 0, len); 568 memcpy(ptr, data, len); 569 570 dev->in_req->length = len; 571 572 debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__, 573 dev->in_req->length, sizeof(data)); 574 575 status = usb_ep_queue(dev->in_ep, dev->in_req, 0); 576 if (status) { 577 error("kill %s: resubmit %d bytes --> %d", 578 dev->in_ep->name, dev->in_req->length, status); 579 usb_ep_set_halt(dev->in_ep); 580 } 581 582 /* Wait until tx interrupt received */ 583 while (!dev->txdata) 584 usb_gadget_handle_interrupts(0); 585 586 dev->txdata = 0; 587 } 588 589 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req) 590 { 591 struct thor_dev *dev = thor_func->dev; 592 int status = req->status; 593 594 debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req); 595 switch (status) { 596 case 0: 597 if (ep == dev->out_ep) 598 dev->rxdata = 1; 599 else 600 dev->txdata = 1; 601 602 break; 603 604 /* this endpoint is normally active while we're configured */ 605 case -ECONNABORTED: /* hardware forced ep reset */ 606 case -ECONNRESET: /* request dequeued */ 607 case -ESHUTDOWN: /* disconnect from host */ 608 case -EREMOTEIO: /* short read */ 609 case -EOVERFLOW: 610 error("ERROR:%d", status); 611 break; 612 } 613 614 debug("%s complete --> %d, %d/%d\n", ep->name, 615 status, req->actual, req->length); 616 } 617 618 static struct usb_request *thor_start_ep(struct usb_ep *ep) 619 { 620 struct usb_request *req; 621 622 req = alloc_ep_req(ep, THOR_PACKET_SIZE); 623 debug("%s: ep:%p req:%p\n", __func__, ep, req); 624 625 if (!req) 626 return NULL; 627 628 memset(req->buf, 0, req->length); 629 req->complete = thor_rx_tx_complete; 630 631 return req; 632 } 633 634 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req) 635 { 636 if (req->status || req->actual != req->length) 637 debug("setup complete --> %d, %d/%d\n", 638 req->status, req->actual, req->length); 639 } 640 641 static int 642 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 643 { 644 struct thor_dev *dev = thor_func->dev; 645 struct usb_request *req = dev->req; 646 struct usb_gadget *gadget = dev->gadget; 647 int value = 0; 648 649 u16 len = le16_to_cpu(ctrl->wLength); 650 651 debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n", 652 ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex, 653 ctrl->wLength); 654 655 switch (ctrl->bRequest) { 656 case USB_CDC_REQ_SET_CONTROL_LINE_STATE: 657 value = 0; 658 break; 659 case USB_CDC_REQ_SET_LINE_CODING: 660 value = len; 661 /* Line Coding set done = configuration done */ 662 thor_func->dev->configuration_done = 1; 663 break; 664 665 default: 666 error("thor_setup: unknown request: %d", ctrl->bRequest); 667 } 668 669 if (value >= 0) { 670 req->length = value; 671 req->zero = value < len; 672 value = usb_ep_queue(gadget->ep0, req, 0); 673 if (value < 0) { 674 debug("%s: ep_queue: %d\n", __func__, value); 675 req->status = 0; 676 } 677 } 678 679 return value; 680 } 681 682 /* Specific to the THOR protocol */ 683 static void thor_set_dma(void *addr, int len) 684 { 685 struct thor_dev *dev = thor_func->dev; 686 687 debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req); 688 debug("addr:%p, len:%d\n", addr, len); 689 690 dev->out_req->buf = addr; 691 dev->out_req->length = len; 692 } 693 694 int thor_init(void) 695 { 696 struct thor_dev *dev = thor_func->dev; 697 698 /* Wait for a device enumeration and configuration settings */ 699 debug("THOR enumeration/configuration setting....\n"); 700 while (!dev->configuration_done) 701 usb_gadget_handle_interrupts(0); 702 703 thor_set_dma(thor_rx_data_buf, strlen("THOR")); 704 /* detect the download request from Host PC */ 705 if (thor_rx_data() < 0) { 706 printf("%s: Data not received!\n", __func__); 707 return -1; 708 } 709 710 if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) { 711 puts("Download request from the Host PC\n"); 712 udelay(30 * 1000); /* 30 ms */ 713 714 strcpy((char *)thor_tx_data_buf, "ROHT"); 715 thor_tx_data(thor_tx_data_buf, strlen("ROHT")); 716 } else { 717 puts("Wrong reply information\n"); 718 return -1; 719 } 720 721 return 0; 722 } 723 724 int thor_handle(void) 725 { 726 int ret; 727 728 /* receive the data from Host PC */ 729 while (1) { 730 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box)); 731 ret = thor_rx_data(); 732 733 if (ret > 0) { 734 ret = process_data(); 735 #ifdef CONFIG_THOR_RESET_OFF 736 if (ret == RESET_DONE) 737 break; 738 #endif 739 if (ret < 0) 740 return ret; 741 } else { 742 printf("%s: No data received!\n", __func__); 743 break; 744 } 745 } 746 747 return 0; 748 } 749 750 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f) 751 { 752 struct usb_gadget *gadget = c->cdev->gadget; 753 struct f_thor *f_thor = func_to_thor(f); 754 struct thor_dev *dev; 755 struct usb_ep *ep; 756 int status; 757 758 thor_func = f_thor; 759 dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev)); 760 if (!dev) 761 return -ENOMEM; 762 763 memset(dev, 0, sizeof(*dev)); 764 dev->gadget = gadget; 765 f_thor->dev = dev; 766 767 debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n", 768 __func__, c, f); 769 debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev); 770 771 /* EP0 */ 772 /* preallocate control response and buffer */ 773 dev->req = usb_ep_alloc_request(gadget->ep0, 0); 774 if (!dev->req) { 775 status = -ENOMEM; 776 goto fail; 777 } 778 dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, 779 THOR_PACKET_SIZE); 780 if (!dev->req->buf) { 781 status = -ENOMEM; 782 goto fail; 783 } 784 785 dev->req->complete = thor_setup_complete; 786 787 /* DYNAMIC interface numbers assignments */ 788 status = usb_interface_id(c, f); 789 790 if (status < 0) 791 goto fail; 792 793 thor_downloader_intf_int.bInterfaceNumber = status; 794 thor_downloader_cdc_union.bMasterInterface0 = status; 795 796 status = usb_interface_id(c, f); 797 798 if (status < 0) 799 goto fail; 800 801 thor_downloader_intf_data.bInterfaceNumber = status; 802 thor_downloader_cdc_union.bSlaveInterface0 = status; 803 804 /* allocate instance-specific endpoints */ 805 ep = usb_ep_autoconfig(gadget, &fs_in_desc); 806 if (!ep) { 807 status = -ENODEV; 808 goto fail; 809 } 810 811 if (gadget_is_dualspeed(gadget)) { 812 hs_in_desc.bEndpointAddress = 813 fs_in_desc.bEndpointAddress; 814 } 815 816 dev->in_ep = ep; /* Store IN EP for enabling @ setup */ 817 ep->driver_data = dev; 818 819 ep = usb_ep_autoconfig(gadget, &fs_out_desc); 820 if (!ep) { 821 status = -ENODEV; 822 goto fail; 823 } 824 825 if (gadget_is_dualspeed(gadget)) 826 hs_out_desc.bEndpointAddress = 827 fs_out_desc.bEndpointAddress; 828 829 dev->out_ep = ep; /* Store OUT EP for enabling @ setup */ 830 ep->driver_data = dev; 831 832 ep = usb_ep_autoconfig(gadget, &fs_int_desc); 833 if (!ep) { 834 status = -ENODEV; 835 goto fail; 836 } 837 838 dev->int_ep = ep; 839 ep->driver_data = dev; 840 841 if (gadget_is_dualspeed(gadget)) { 842 hs_int_desc.bEndpointAddress = 843 fs_int_desc.bEndpointAddress; 844 845 f->hs_descriptors = (struct usb_descriptor_header **) 846 &hs_thor_downloader_function; 847 848 if (!f->hs_descriptors) 849 goto fail; 850 } 851 852 debug("%s: out_ep:%p out_req:%p\n", __func__, 853 dev->out_ep, dev->out_req); 854 855 return 0; 856 857 fail: 858 free(dev); 859 return status; 860 } 861 862 static void free_ep_req(struct usb_ep *ep, struct usb_request *req) 863 { 864 free(req->buf); 865 usb_ep_free_request(ep, req); 866 } 867 868 static void thor_unbind(struct usb_configuration *c, struct usb_function *f) 869 { 870 struct f_thor *f_thor = func_to_thor(f); 871 struct thor_dev *dev = f_thor->dev; 872 873 free(dev); 874 memset(thor_func, 0, sizeof(*thor_func)); 875 thor_func = NULL; 876 } 877 878 static void thor_func_disable(struct usb_function *f) 879 { 880 struct f_thor *f_thor = func_to_thor(f); 881 struct thor_dev *dev = f_thor->dev; 882 883 debug("%s:\n", __func__); 884 885 /* Avoid freeing memory when ep is still claimed */ 886 if (dev->in_ep->driver_data) { 887 free_ep_req(dev->in_ep, dev->in_req); 888 usb_ep_disable(dev->in_ep); 889 dev->in_ep->driver_data = NULL; 890 } 891 892 if (dev->out_ep->driver_data) { 893 dev->out_req->buf = NULL; 894 usb_ep_free_request(dev->out_ep, dev->out_req); 895 usb_ep_disable(dev->out_ep); 896 dev->out_ep->driver_data = NULL; 897 } 898 899 if (dev->int_ep->driver_data) { 900 usb_ep_disable(dev->int_ep); 901 dev->int_ep->driver_data = NULL; 902 } 903 } 904 905 static int thor_eps_setup(struct usb_function *f) 906 { 907 struct usb_composite_dev *cdev = f->config->cdev; 908 struct usb_gadget *gadget = cdev->gadget; 909 struct thor_dev *dev = thor_func->dev; 910 struct usb_endpoint_descriptor *d; 911 struct usb_request *req; 912 struct usb_ep *ep; 913 int result; 914 915 ep = dev->in_ep; 916 d = ep_desc(gadget, &hs_in_desc, &fs_in_desc); 917 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 918 919 result = usb_ep_enable(ep, d); 920 if (result) 921 goto exit; 922 923 ep->driver_data = cdev; /* claim */ 924 req = thor_start_ep(ep); 925 if (!req) { 926 usb_ep_disable(ep); 927 result = -EIO; 928 goto exit; 929 } 930 931 dev->in_req = req; 932 ep = dev->out_ep; 933 d = ep_desc(gadget, &hs_out_desc, &fs_out_desc); 934 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 935 936 result = usb_ep_enable(ep, d); 937 if (result) 938 goto exit; 939 940 ep->driver_data = cdev; /* claim */ 941 req = thor_start_ep(ep); 942 if (!req) { 943 usb_ep_disable(ep); 944 result = -EIO; 945 goto exit; 946 } 947 948 dev->out_req = req; 949 /* ACM control EP */ 950 ep = dev->int_ep; 951 ep->driver_data = cdev; /* claim */ 952 953 exit: 954 return result; 955 } 956 957 static int thor_func_set_alt(struct usb_function *f, 958 unsigned intf, unsigned alt) 959 { 960 struct thor_dev *dev = thor_func->dev; 961 int result; 962 963 debug("%s: func: %s intf: %d alt: %d\n", 964 __func__, f->name, intf, alt); 965 966 switch (intf) { 967 case 0: 968 debug("ACM INTR interface\n"); 969 break; 970 case 1: 971 debug("Communication Data interface\n"); 972 result = thor_eps_setup(f); 973 if (result) 974 error("%s: EPs setup failed!", __func__); 975 dev->configuration_done = 1; 976 break; 977 } 978 979 return 0; 980 } 981 982 static int thor_func_init(struct usb_configuration *c) 983 { 984 struct f_thor *f_thor; 985 int status; 986 987 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 988 989 f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor)); 990 if (!f_thor) 991 return -ENOMEM; 992 993 memset(f_thor, 0, sizeof(*f_thor)); 994 995 f_thor->usb_function.name = "f_thor"; 996 f_thor->usb_function.bind = thor_func_bind; 997 f_thor->usb_function.unbind = thor_unbind; 998 f_thor->usb_function.setup = thor_func_setup; 999 f_thor->usb_function.set_alt = thor_func_set_alt; 1000 f_thor->usb_function.disable = thor_func_disable; 1001 1002 status = usb_add_function(c, &f_thor->usb_function); 1003 if (status) 1004 free(f_thor); 1005 1006 return status; 1007 } 1008 1009 int thor_add(struct usb_configuration *c) 1010 { 1011 debug("%s:\n", __func__); 1012 return thor_func_init(c); 1013 } 1014 1015 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add); 1016