1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * f_thor.c -- USB TIZEN THOR Downloader gadget function 4 * 5 * Copyright (C) 2013 Samsung Electronics 6 * Lukasz Majewski <l.majewski@samsung.com> 7 * 8 * Based on code from: 9 * git://review.tizen.org/kernel/u-boot 10 * 11 * Developed by: 12 * Copyright (C) 2009 Samsung Electronics 13 * Minkyu Kang <mk7.kang@samsung.com> 14 * Sanghee Kim <sh0130.kim@samsung.com> 15 */ 16 17 #include <errno.h> 18 #include <common.h> 19 #include <console.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 + 1); 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 pr_err("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 pr_err("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 pr_err("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 pr_err("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 pr_err("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 = (unsigned long long int)rqt->int_data[0] + 266 (((unsigned long long int)rqt->int_data[1]) 267 << 32); 268 debug("INIT: total %llu bytes\n", thor_file_size); 269 break; 270 case RQT_DL_FILE_INFO: 271 file_type = rqt->int_data[0]; 272 if (file_type == FILE_TYPE_PIT) { 273 puts("PIT table file - not supported\n"); 274 rsp->ack = -ENOTSUPP; 275 ret = rsp->ack; 276 break; 277 } 278 279 thor_file_size = (unsigned long long int)rqt->int_data[1] + 280 (((unsigned long long int)rqt->int_data[2]) 281 << 32); 282 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE); 283 f_name[F_NAME_BUF_SIZE] = '\0'; 284 285 debug("INFO: name(%s, %d), size(%llu), type(%d)\n", 286 f_name, 0, thor_file_size, file_type); 287 288 rsp->int_data[0] = THOR_PACKET_SIZE; 289 290 alt_setting_num = dfu_get_alt(f_name); 291 if (alt_setting_num < 0) { 292 pr_err("Alt setting [%d] to write not found!", 293 alt_setting_num); 294 rsp->ack = -ENODEV; 295 ret = rsp->ack; 296 } 297 break; 298 case RQT_DL_FILE_START: 299 send_rsp(rsp); 300 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE, 301 &left, &cnt); 302 if (ret_head < 0) { 303 left = 0; 304 cnt = 0; 305 } 306 return ret_head; 307 case RQT_DL_FILE_END: 308 debug("DL FILE_END\n"); 309 rsp->ack = download_tail(left, cnt); 310 ret = rsp->ack; 311 left = 0; 312 cnt = 0; 313 break; 314 case RQT_DL_EXIT: 315 debug("DL EXIT\n"); 316 break; 317 default: 318 pr_err("Operation not supported: %d", rqt->rqt_data); 319 ret = -ENOTSUPP; 320 } 321 322 send_rsp(rsp); 323 return ret; 324 } 325 326 static int process_data(void) 327 { 328 ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box)); 329 int ret = -EINVAL; 330 331 memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box)); 332 333 debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data); 334 335 switch (rqt->rqt) { 336 case RQT_INFO: 337 ret = process_rqt_info(rqt); 338 break; 339 case RQT_CMD: 340 ret = process_rqt_cmd(rqt); 341 break; 342 case RQT_DL: 343 ret = (int) process_rqt_download(rqt); 344 break; 345 case RQT_UL: 346 puts("RQT: UPLOAD not supported!\n"); 347 break; 348 default: 349 pr_err("unknown request (%d)", rqt->rqt); 350 } 351 352 return ret; 353 } 354 355 /* ********************************************************** */ 356 /* THOR USB Function */ 357 /* ********************************************************** */ 358 359 static inline struct usb_endpoint_descriptor * 360 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs, 361 struct usb_endpoint_descriptor *fs) 362 { 363 if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH) 364 return hs; 365 return fs; 366 } 367 368 static struct usb_interface_descriptor thor_downloader_intf_data = { 369 .bLength = sizeof(thor_downloader_intf_data), 370 .bDescriptorType = USB_DT_INTERFACE, 371 372 .bNumEndpoints = 2, 373 .bInterfaceClass = USB_CLASS_CDC_DATA, 374 }; 375 376 static struct usb_endpoint_descriptor fs_in_desc = { 377 .bLength = USB_DT_ENDPOINT_SIZE, 378 .bDescriptorType = USB_DT_ENDPOINT, 379 380 .bEndpointAddress = USB_DIR_IN, 381 .bmAttributes = USB_ENDPOINT_XFER_BULK, 382 }; 383 384 static struct usb_endpoint_descriptor fs_out_desc = { 385 .bLength = USB_DT_ENDPOINT_SIZE, 386 .bDescriptorType = USB_DT_ENDPOINT, 387 388 .bEndpointAddress = USB_DIR_OUT, 389 .bmAttributes = USB_ENDPOINT_XFER_BULK, 390 }; 391 392 /* CDC configuration */ 393 static struct usb_interface_descriptor thor_downloader_intf_int = { 394 .bLength = sizeof(thor_downloader_intf_int), 395 .bDescriptorType = USB_DT_INTERFACE, 396 397 .bNumEndpoints = 1, 398 .bInterfaceClass = USB_CLASS_COMM, 399 /* 0x02 Abstract Line Control Model */ 400 .bInterfaceSubClass = USB_CDC_SUBCLASS_ACM, 401 /* 0x01 Common AT commands */ 402 .bInterfaceProtocol = USB_CDC_ACM_PROTO_AT_V25TER, 403 }; 404 405 static struct usb_cdc_header_desc thor_downloader_cdc_header = { 406 .bLength = sizeof(thor_downloader_cdc_header), 407 .bDescriptorType = 0x24, /* CS_INTERFACE */ 408 .bDescriptorSubType = 0x00, 409 .bcdCDC = 0x0110, 410 }; 411 412 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = { 413 .bLength = sizeof(thor_downloader_cdc_call), 414 .bDescriptorType = 0x24, /* CS_INTERFACE */ 415 .bDescriptorSubType = 0x01, 416 .bmCapabilities = 0x00, 417 .bDataInterface = 0x01, 418 }; 419 420 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = { 421 .bLength = sizeof(thor_downloader_cdc_abstract), 422 .bDescriptorType = 0x24, /* CS_INTERFACE */ 423 .bDescriptorSubType = 0x02, 424 .bmCapabilities = 0x00, 425 }; 426 427 static struct usb_cdc_union_desc thor_downloader_cdc_union = { 428 .bLength = sizeof(thor_downloader_cdc_union), 429 .bDescriptorType = 0x24, /* CS_INTERFACE */ 430 .bDescriptorSubType = USB_CDC_UNION_TYPE, 431 }; 432 433 static struct usb_endpoint_descriptor fs_int_desc = { 434 .bLength = USB_DT_ENDPOINT_SIZE, 435 .bDescriptorType = USB_DT_ENDPOINT, 436 437 .bEndpointAddress = 3 | USB_DIR_IN, 438 .bmAttributes = USB_ENDPOINT_XFER_INT, 439 .wMaxPacketSize = __constant_cpu_to_le16(16), 440 441 .bInterval = 0x9, 442 }; 443 444 static struct usb_interface_assoc_descriptor 445 thor_iad_descriptor = { 446 .bLength = sizeof(thor_iad_descriptor), 447 .bDescriptorType = USB_DT_INTERFACE_ASSOCIATION, 448 449 .bFirstInterface = 0, 450 .bInterfaceCount = 2, /* control + data */ 451 .bFunctionClass = USB_CLASS_COMM, 452 .bFunctionSubClass = USB_CDC_SUBCLASS_ACM, 453 .bFunctionProtocol = USB_CDC_PROTO_NONE, 454 }; 455 456 static struct usb_endpoint_descriptor hs_in_desc = { 457 .bLength = USB_DT_ENDPOINT_SIZE, 458 .bDescriptorType = USB_DT_ENDPOINT, 459 460 .bmAttributes = USB_ENDPOINT_XFER_BULK, 461 .wMaxPacketSize = __constant_cpu_to_le16(512), 462 }; 463 464 static struct usb_endpoint_descriptor hs_out_desc = { 465 .bLength = USB_DT_ENDPOINT_SIZE, 466 .bDescriptorType = USB_DT_ENDPOINT, 467 468 .bmAttributes = USB_ENDPOINT_XFER_BULK, 469 .wMaxPacketSize = __constant_cpu_to_le16(512), 470 }; 471 472 static struct usb_endpoint_descriptor hs_int_desc = { 473 .bLength = USB_DT_ENDPOINT_SIZE, 474 .bDescriptorType = USB_DT_ENDPOINT, 475 476 .bmAttributes = USB_ENDPOINT_XFER_INT, 477 .wMaxPacketSize = __constant_cpu_to_le16(16), 478 479 .bInterval = 0x9, 480 }; 481 482 /* 483 * This attribute vendor descriptor is necessary for correct operation with 484 * Windows version of THOR download program 485 * 486 * It prevents windows driver from sending zero lenght packet (ZLP) after 487 * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb 488 */ 489 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = { 490 .bLength = sizeof(thor_downloader_cdc_av), 491 .bDescriptorType = 0x24, 492 .bDescriptorSubType = 0x80, 493 .DAUType = 0x0002, 494 .DAULength = 0x0001, 495 .DAUValue = 0x00, 496 }; 497 498 static const struct usb_descriptor_header *hs_thor_downloader_function[] = { 499 (struct usb_descriptor_header *)&thor_iad_descriptor, 500 501 (struct usb_descriptor_header *)&thor_downloader_intf_int, 502 (struct usb_descriptor_header *)&thor_downloader_cdc_header, 503 (struct usb_descriptor_header *)&thor_downloader_cdc_call, 504 (struct usb_descriptor_header *)&thor_downloader_cdc_abstract, 505 (struct usb_descriptor_header *)&thor_downloader_cdc_union, 506 (struct usb_descriptor_header *)&hs_int_desc, 507 508 (struct usb_descriptor_header *)&thor_downloader_intf_data, 509 (struct usb_descriptor_header *)&thor_downloader_cdc_av, 510 (struct usb_descriptor_header *)&hs_in_desc, 511 (struct usb_descriptor_header *)&hs_out_desc, 512 NULL, 513 }; 514 515 /*-------------------------------------------------------------------------*/ 516 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length) 517 { 518 struct usb_request *req; 519 520 req = usb_ep_alloc_request(ep, 0); 521 if (!req) 522 return req; 523 524 req->length = length; 525 req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length); 526 if (!req->buf) { 527 usb_ep_free_request(ep, req); 528 req = NULL; 529 } 530 531 return req; 532 } 533 534 static int thor_rx_data(void) 535 { 536 struct thor_dev *dev = thor_func->dev; 537 int data_to_rx, tmp, status; 538 539 data_to_rx = dev->out_req->length; 540 tmp = data_to_rx; 541 do { 542 dev->out_req->length = data_to_rx; 543 debug("dev->out_req->length:%d dev->rxdata:%d\n", 544 dev->out_req->length, dev->rxdata); 545 546 status = usb_ep_queue(dev->out_ep, dev->out_req, 0); 547 if (status) { 548 pr_err("kill %s: resubmit %d bytes --> %d", 549 dev->out_ep->name, dev->out_req->length, status); 550 usb_ep_set_halt(dev->out_ep); 551 return -EAGAIN; 552 } 553 554 while (!dev->rxdata) { 555 usb_gadget_handle_interrupts(0); 556 if (ctrlc()) 557 return -1; 558 } 559 dev->rxdata = 0; 560 data_to_rx -= dev->out_req->actual; 561 } while (data_to_rx); 562 563 return tmp; 564 } 565 566 static void thor_tx_data(unsigned char *data, int len) 567 { 568 struct thor_dev *dev = thor_func->dev; 569 unsigned char *ptr = dev->in_req->buf; 570 int status; 571 572 memset(ptr, 0, len); 573 memcpy(ptr, data, len); 574 575 dev->in_req->length = len; 576 577 debug("%s: dev->in_req->length:%d to_cpy:%zd\n", __func__, 578 dev->in_req->length, sizeof(data)); 579 580 status = usb_ep_queue(dev->in_ep, dev->in_req, 0); 581 if (status) { 582 pr_err("kill %s: resubmit %d bytes --> %d", 583 dev->in_ep->name, dev->in_req->length, status); 584 usb_ep_set_halt(dev->in_ep); 585 } 586 587 /* Wait until tx interrupt received */ 588 while (!dev->txdata) 589 usb_gadget_handle_interrupts(0); 590 591 dev->txdata = 0; 592 } 593 594 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req) 595 { 596 struct thor_dev *dev = thor_func->dev; 597 int status = req->status; 598 599 debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req); 600 switch (status) { 601 case 0: 602 if (ep == dev->out_ep) 603 dev->rxdata = 1; 604 else 605 dev->txdata = 1; 606 607 break; 608 609 /* this endpoint is normally active while we're configured */ 610 case -ECONNABORTED: /* hardware forced ep reset */ 611 case -ECONNRESET: /* request dequeued */ 612 case -ESHUTDOWN: /* disconnect from host */ 613 case -EREMOTEIO: /* short read */ 614 case -EOVERFLOW: 615 pr_err("ERROR:%d", status); 616 break; 617 } 618 619 debug("%s complete --> %d, %d/%d\n", ep->name, 620 status, req->actual, req->length); 621 } 622 623 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req) 624 { 625 if (req->status || req->actual != req->length) 626 debug("setup complete --> %d, %d/%d\n", 627 req->status, req->actual, req->length); 628 } 629 630 static int 631 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl) 632 { 633 struct thor_dev *dev = thor_func->dev; 634 struct usb_request *req = dev->req; 635 struct usb_gadget *gadget = dev->gadget; 636 int value = 0; 637 638 u16 len = le16_to_cpu(ctrl->wLength); 639 640 debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n", 641 ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex, 642 ctrl->wLength); 643 644 switch (ctrl->bRequest) { 645 case USB_CDC_REQ_SET_CONTROL_LINE_STATE: 646 value = 0; 647 break; 648 case USB_CDC_REQ_SET_LINE_CODING: 649 value = len; 650 /* Line Coding set done = configuration done */ 651 thor_func->dev->configuration_done = 1; 652 break; 653 654 default: 655 pr_err("thor_setup: unknown request: %d", ctrl->bRequest); 656 } 657 658 if (value >= 0) { 659 req->length = value; 660 req->zero = value < len; 661 value = usb_ep_queue(gadget->ep0, req, 0); 662 if (value < 0) { 663 debug("%s: ep_queue: %d\n", __func__, value); 664 req->status = 0; 665 } 666 } 667 668 return value; 669 } 670 671 /* Specific to the THOR protocol */ 672 static void thor_set_dma(void *addr, int len) 673 { 674 struct thor_dev *dev = thor_func->dev; 675 676 debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req); 677 debug("addr:%p, len:%d\n", addr, len); 678 679 dev->out_req->buf = addr; 680 dev->out_req->length = len; 681 } 682 683 int thor_init(void) 684 { 685 struct thor_dev *dev = thor_func->dev; 686 687 /* Wait for a device enumeration and configuration settings */ 688 debug("THOR enumeration/configuration setting....\n"); 689 while (!dev->configuration_done) 690 usb_gadget_handle_interrupts(0); 691 692 thor_set_dma(thor_rx_data_buf, strlen("THOR")); 693 /* detect the download request from Host PC */ 694 if (thor_rx_data() < 0) { 695 printf("%s: Data not received!\n", __func__); 696 return -1; 697 } 698 699 if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) { 700 puts("Download request from the Host PC\n"); 701 udelay(30 * 1000); /* 30 ms */ 702 703 strcpy((char *)thor_tx_data_buf, "ROHT"); 704 thor_tx_data(thor_tx_data_buf, strlen("ROHT")); 705 } else { 706 puts("Wrong reply information\n"); 707 return -1; 708 } 709 710 return 0; 711 } 712 713 int thor_handle(void) 714 { 715 int ret; 716 717 /* receive the data from Host PC */ 718 while (1) { 719 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box)); 720 ret = thor_rx_data(); 721 722 if (ret > 0) { 723 ret = process_data(); 724 #ifdef CONFIG_THOR_RESET_OFF 725 if (ret == RESET_DONE) 726 break; 727 #endif 728 if (ret < 0) 729 return ret; 730 } else { 731 printf("%s: No data received!\n", __func__); 732 break; 733 } 734 } 735 736 return 0; 737 } 738 739 static void free_ep_req(struct usb_ep *ep, struct usb_request *req) 740 { 741 if (req->buf) 742 free(req->buf); 743 usb_ep_free_request(ep, req); 744 } 745 746 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f) 747 { 748 struct usb_gadget *gadget = c->cdev->gadget; 749 struct f_thor *f_thor = func_to_thor(f); 750 struct thor_dev *dev; 751 struct usb_ep *ep; 752 int status; 753 754 thor_func = f_thor; 755 dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev)); 756 if (!dev) 757 return -ENOMEM; 758 759 memset(dev, 0, sizeof(*dev)); 760 dev->gadget = gadget; 761 f_thor->dev = dev; 762 763 debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n", 764 __func__, c, f); 765 debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev); 766 767 /* EP0 */ 768 /* preallocate control response and buffer */ 769 dev->req = usb_ep_alloc_request(gadget->ep0, 0); 770 if (!dev->req) { 771 status = -ENOMEM; 772 goto fail; 773 } 774 dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, 775 THOR_PACKET_SIZE); 776 if (!dev->req->buf) { 777 status = -ENOMEM; 778 goto fail; 779 } 780 781 dev->req->complete = thor_setup_complete; 782 783 /* DYNAMIC interface numbers assignments */ 784 status = usb_interface_id(c, f); 785 786 if (status < 0) 787 goto fail; 788 789 thor_downloader_intf_int.bInterfaceNumber = status; 790 thor_downloader_cdc_union.bMasterInterface0 = status; 791 792 status = usb_interface_id(c, f); 793 794 if (status < 0) 795 goto fail; 796 797 thor_downloader_intf_data.bInterfaceNumber = status; 798 thor_downloader_cdc_union.bSlaveInterface0 = status; 799 800 /* allocate instance-specific endpoints */ 801 ep = usb_ep_autoconfig(gadget, &fs_in_desc); 802 if (!ep) { 803 status = -ENODEV; 804 goto fail; 805 } 806 807 if (gadget_is_dualspeed(gadget)) { 808 hs_in_desc.bEndpointAddress = 809 fs_in_desc.bEndpointAddress; 810 } 811 812 dev->in_ep = ep; /* Store IN EP for enabling @ setup */ 813 ep->driver_data = dev; 814 815 ep = usb_ep_autoconfig(gadget, &fs_out_desc); 816 if (!ep) { 817 status = -ENODEV; 818 goto fail; 819 } 820 821 if (gadget_is_dualspeed(gadget)) 822 hs_out_desc.bEndpointAddress = 823 fs_out_desc.bEndpointAddress; 824 825 dev->out_ep = ep; /* Store OUT EP for enabling @ setup */ 826 ep->driver_data = dev; 827 828 ep = usb_ep_autoconfig(gadget, &fs_int_desc); 829 if (!ep) { 830 status = -ENODEV; 831 goto fail; 832 } 833 834 dev->int_ep = ep; 835 ep->driver_data = dev; 836 837 if (gadget_is_dualspeed(gadget)) { 838 hs_int_desc.bEndpointAddress = 839 fs_int_desc.bEndpointAddress; 840 841 f->hs_descriptors = (struct usb_descriptor_header **) 842 &hs_thor_downloader_function; 843 844 if (!f->hs_descriptors) 845 goto fail; 846 } 847 848 debug("%s: out_ep:%p out_req:%p\n", __func__, 849 dev->out_ep, dev->out_req); 850 851 return 0; 852 853 fail: 854 if (dev->req) 855 free_ep_req(gadget->ep0, dev->req); 856 free(dev); 857 return status; 858 } 859 860 static void thor_unbind(struct usb_configuration *c, struct usb_function *f) 861 { 862 struct f_thor *f_thor = func_to_thor(f); 863 struct thor_dev *dev = f_thor->dev; 864 865 free_ep_req(dev->gadget->ep0, dev->req); 866 free(dev); 867 memset(thor_func, 0, sizeof(*thor_func)); 868 thor_func = NULL; 869 } 870 871 static void thor_func_disable(struct usb_function *f) 872 { 873 struct f_thor *f_thor = func_to_thor(f); 874 struct thor_dev *dev = f_thor->dev; 875 876 debug("%s:\n", __func__); 877 878 /* Avoid freeing memory when ep is still claimed */ 879 if (dev->in_ep->driver_data) { 880 free_ep_req(dev->in_ep, dev->in_req); 881 usb_ep_disable(dev->in_ep); 882 dev->in_ep->driver_data = NULL; 883 } 884 885 if (dev->out_ep->driver_data) { 886 usb_ep_free_request(dev->out_ep, dev->out_req); 887 usb_ep_disable(dev->out_ep); 888 dev->out_ep->driver_data = NULL; 889 } 890 891 if (dev->int_ep->driver_data) { 892 usb_ep_disable(dev->int_ep); 893 dev->int_ep->driver_data = NULL; 894 } 895 } 896 897 static int thor_eps_setup(struct usb_function *f) 898 { 899 struct usb_composite_dev *cdev = f->config->cdev; 900 struct usb_gadget *gadget = cdev->gadget; 901 struct thor_dev *dev = thor_func->dev; 902 struct usb_endpoint_descriptor *d; 903 struct usb_request *req; 904 struct usb_ep *ep; 905 int result; 906 907 ep = dev->in_ep; 908 d = ep_desc(gadget, &hs_in_desc, &fs_in_desc); 909 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 910 911 result = usb_ep_enable(ep, d); 912 if (result) 913 goto err; 914 915 ep->driver_data = cdev; /* claim */ 916 req = alloc_ep_req(ep, THOR_PACKET_SIZE); 917 if (!req) { 918 result = -EIO; 919 goto err_disable_in_ep; 920 } 921 922 memset(req->buf, 0, req->length); 923 req->complete = thor_rx_tx_complete; 924 dev->in_req = req; 925 ep = dev->out_ep; 926 d = ep_desc(gadget, &hs_out_desc, &fs_out_desc); 927 debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress); 928 929 result = usb_ep_enable(ep, d); 930 if (result) 931 goto err_free_in_req; 932 933 ep->driver_data = cdev; /* claim */ 934 req = usb_ep_alloc_request(ep, 0); 935 if (!req) { 936 result = -EIO; 937 goto err_disable_out_ep; 938 } 939 940 req->complete = thor_rx_tx_complete; 941 dev->out_req = req; 942 /* ACM control EP */ 943 ep = dev->int_ep; 944 ep->driver_data = cdev; /* claim */ 945 946 return 0; 947 948 err_disable_out_ep: 949 usb_ep_disable(dev->out_ep); 950 951 err_free_in_req: 952 free_ep_req(dev->in_ep, dev->in_req); 953 dev->in_req = NULL; 954 955 err_disable_in_ep: 956 usb_ep_disable(dev->in_ep); 957 958 err: 959 return result; 960 } 961 962 static int thor_func_set_alt(struct usb_function *f, 963 unsigned intf, unsigned alt) 964 { 965 struct thor_dev *dev = thor_func->dev; 966 int result; 967 968 debug("%s: func: %s intf: %d alt: %d\n", 969 __func__, f->name, intf, alt); 970 971 switch (intf) { 972 case 0: 973 debug("ACM INTR interface\n"); 974 break; 975 case 1: 976 debug("Communication Data interface\n"); 977 result = thor_eps_setup(f); 978 if (result) 979 pr_err("%s: EPs setup failed!", __func__); 980 dev->configuration_done = 1; 981 break; 982 } 983 984 return 0; 985 } 986 987 static int thor_func_init(struct usb_configuration *c) 988 { 989 struct f_thor *f_thor; 990 int status; 991 992 debug("%s: cdev: 0x%p\n", __func__, c->cdev); 993 994 f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor)); 995 if (!f_thor) 996 return -ENOMEM; 997 998 memset(f_thor, 0, sizeof(*f_thor)); 999 1000 f_thor->usb_function.name = "f_thor"; 1001 f_thor->usb_function.bind = thor_func_bind; 1002 f_thor->usb_function.unbind = thor_unbind; 1003 f_thor->usb_function.setup = thor_func_setup; 1004 f_thor->usb_function.set_alt = thor_func_set_alt; 1005 f_thor->usb_function.disable = thor_func_disable; 1006 1007 status = usb_add_function(c, &f_thor->usb_function); 1008 if (status) 1009 free(f_thor); 1010 1011 return status; 1012 } 1013 1014 int thor_add(struct usb_configuration *c) 1015 { 1016 debug("%s:\n", __func__); 1017 return thor_func_init(c); 1018 } 1019 1020 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add); 1021