drivers/usb/gadget/f_thor.c

   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         memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
 310
 311         debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
 312
 313         switch (rqt->rqt) {
 314         case RQT_INFO:
 315                 ret = process_rqt_info(rqt);
 316                 break;
 317         case RQT_CMD:
 318                 ret = process_rqt_cmd(rqt);
 319                 break;
 320         case RQT_DL:
 321                 ret = (int) process_rqt_download(rqt);
 322                 break;
 323         case RQT_UL:
 324                 puts("RQT: UPLOAD not supported!\n");
 325                 break;
 326         default:
 327                 error("unknown request (%d)", rqt->rqt);
 328         }
 329
 330         return ret;
 331 }
 332
 333 /* ********************************************************** */
 334 /*         THOR USB Function                                  */
 335 /* ********************************************************** */
 336
 337 static inline struct usb_endpoint_descriptor *
 338 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
 339         struct usb_endpoint_descriptor *fs)
 340 {
 341         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 342                 return hs;
 343         return fs;
 344 }
 345
 346 static struct usb_interface_descriptor thor_downloader_intf_data = {
 347         .bLength =              sizeof(thor_downloader_intf_data),
 348         .bDescriptorType =      USB_DT_INTERFACE,
 349
 350         .bNumEndpoints =        2,
 351         .bInterfaceClass =      USB_CLASS_CDC_DATA,
 352 };
 353
 354 static struct usb_endpoint_descriptor fs_in_desc = {
 355         .bLength =              USB_DT_ENDPOINT_SIZE,
 356         .bDescriptorType =      USB_DT_ENDPOINT,
 357
 358         .bEndpointAddress =     USB_DIR_IN,
 359         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 360 };
 361
 362 static struct usb_endpoint_descriptor fs_out_desc = {
 363         .bLength =              USB_DT_ENDPOINT_SIZE,
 364         .bDescriptorType =      USB_DT_ENDPOINT,
 365
 366         .bEndpointAddress =     USB_DIR_OUT,
 367         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 368 };
 369
 370 /* CDC configuration */
 371 static struct usb_interface_descriptor thor_downloader_intf_int = {
 372         .bLength =              sizeof(thor_downloader_intf_int),
 373         .bDescriptorType =      USB_DT_INTERFACE,
 374
 375         .bNumEndpoints =        1,
 376         .bInterfaceClass =      USB_CLASS_COMM,
 377          /* 0x02 Abstract Line Control Model */
 378         .bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
 379         /* 0x01 Common AT commands */
 380         .bInterfaceProtocol =   USB_CDC_ACM_PROTO_AT_V25TER,
 381 };
 382
 383 static struct usb_cdc_header_desc thor_downloader_cdc_header = {
 384         .bLength         =    sizeof(thor_downloader_cdc_header),
 385         .bDescriptorType =    0x24, /* CS_INTERFACE */
 386         .bDescriptorSubType = 0x00,
 387         .bcdCDC =             0x0110,
 388 };
 389
 390 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
 391         .bLength         =    sizeof(thor_downloader_cdc_call),
 392         .bDescriptorType =    0x24, /* CS_INTERFACE */
 393         .bDescriptorSubType = 0x01,
 394         .bmCapabilities =     0x00,
 395         .bDataInterface =     0x01,
 396 };
 397
 398 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
 399         .bLength         =    sizeof(thor_downloader_cdc_abstract),
 400         .bDescriptorType =    0x24, /* CS_INTERFACE */
 401         .bDescriptorSubType = 0x02,
 402         .bmCapabilities =     0x00,
 403 };
 404
 405 static struct usb_cdc_union_desc thor_downloader_cdc_union = {
 406         .bLength         =     sizeof(thor_downloader_cdc_union),
 407         .bDescriptorType =     0x24, /* CS_INTERFACE */
 408         .bDescriptorSubType =  USB_CDC_UNION_TYPE,
 409 };
 410
 411 static struct usb_endpoint_descriptor fs_int_desc = {
 412         .bLength = USB_DT_ENDPOINT_SIZE,
 413         .bDescriptorType = USB_DT_ENDPOINT,
 414
 415         .bEndpointAddress = 3 | USB_DIR_IN,
 416         .bmAttributes = USB_ENDPOINT_XFER_INT,
 417         .wMaxPacketSize = __constant_cpu_to_le16(16),
 418
 419         .bInterval = 0x9,
 420 };
 421
 422 static struct usb_interface_assoc_descriptor
 423 thor_iad_descriptor = {
 424         .bLength =              sizeof(thor_iad_descriptor),
 425         .bDescriptorType =      USB_DT_INTERFACE_ASSOCIATION,
 426
 427         .bFirstInterface =      0,
 428         .bInterfaceCount =      2,      /* control + data */
 429         .bFunctionClass =       USB_CLASS_COMM,
 430         .bFunctionSubClass =    USB_CDC_SUBCLASS_ACM,
 431         .bFunctionProtocol =    USB_CDC_PROTO_NONE,
 432 };
 433
 434 static struct usb_endpoint_descriptor hs_in_desc = {
 435         .bLength =              USB_DT_ENDPOINT_SIZE,
 436         .bDescriptorType =      USB_DT_ENDPOINT,
 437
 438         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 439         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 440 };
 441
 442 static struct usb_endpoint_descriptor hs_out_desc = {
 443         .bLength =              USB_DT_ENDPOINT_SIZE,
 444         .bDescriptorType =      USB_DT_ENDPOINT,
 445
 446         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 447         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 448 };
 449
 450 static struct usb_endpoint_descriptor hs_int_desc = {
 451         .bLength = USB_DT_ENDPOINT_SIZE,
 452         .bDescriptorType = USB_DT_ENDPOINT,
 453
 454         .bmAttributes = USB_ENDPOINT_XFER_INT,
 455         .wMaxPacketSize = __constant_cpu_to_le16(16),
 456
 457         .bInterval = 0x9,
 458 };
 459
 460 static struct usb_qualifier_descriptor dev_qualifier = {
 461         .bLength =              sizeof(dev_qualifier),
 462         .bDescriptorType =      USB_DT_DEVICE_QUALIFIER,
 463
 464         .bcdUSB =               __constant_cpu_to_le16(0x0200),
 465         .bDeviceClass = USB_CLASS_VENDOR_SPEC,
 466
 467         .bNumConfigurations =   2,
 468 };
 469
 470 /*
 471  * This attribute vendor descriptor is necessary for correct operation with
 472  * Windows version of THOR download program
 473  *
 474  * It prevents windows driver from sending zero lenght packet (ZLP) after
 475  * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
 476  */
 477 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
 478         .bLength =              sizeof(thor_downloader_cdc_av),
 479         .bDescriptorType =      0x24,
 480         .bDescriptorSubType =   0x80,
 481         .DAUType =              0x0002,
 482         .DAULength =            0x0001,
 483         .DAUValue =             0x00,
 484 };
 485
 486 static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
 487         (struct usb_descriptor_header *)&thor_iad_descriptor,
 488
 489         (struct usb_descriptor_header *)&thor_downloader_intf_int,
 490         (struct usb_descriptor_header *)&thor_downloader_cdc_header,
 491         (struct usb_descriptor_header *)&thor_downloader_cdc_call,
 492         (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
 493         (struct usb_descriptor_header *)&thor_downloader_cdc_union,
 494         (struct usb_descriptor_header *)&hs_int_desc,
 495
 496         (struct usb_descriptor_header *)&thor_downloader_intf_data,
 497         (struct usb_descriptor_header *)&thor_downloader_cdc_av,
 498         (struct usb_descriptor_header *)&hs_in_desc,
 499         (struct usb_descriptor_header *)&hs_out_desc,
 500         NULL,
 501 };
 502
 503 /*-------------------------------------------------------------------------*/
 504 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
 505 {
 506         struct usb_request *req;
 507
 508         req = usb_ep_alloc_request(ep, 0);
 509         if (!req)
 510                 return req;
 511
 512         req->length = length;
 513         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
 514         if (!req->buf) {
 515                 usb_ep_free_request(ep, req);
 516                 req = NULL;
 517         }
 518
 519         return req;
 520 }
 521
 522 static int thor_rx_data(void)
 523 {
 524         struct thor_dev *dev = thor_func->dev;
 525         int data_to_rx, tmp, status;
 526
 527         data_to_rx = dev->out_req->length;
 528         tmp = data_to_rx;
 529         do {
 530                 dev->out_req->length = data_to_rx;
 531                 debug("dev->out_req->length:%d dev->rxdata:%d\n",
 532                       dev->out_req->length, dev->rxdata);
 533
 534                 status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
 535                 if (status) {
 536                         error("kill %s:  resubmit %d bytes --> %d",
 537                               dev->out_ep->name, dev->out_req->length, status);
 538                         usb_ep_set_halt(dev->out_ep);
 539                         return -EAGAIN;
 540                 }
 541
 542                 while (!dev->rxdata) {
 543                         usb_gadget_handle_interrupts();
 544                         if (ctrlc())
 545                                 return -1;
 546                 }
 547                 dev->rxdata = 0;
 548                 data_to_rx -= dev->out_req->actual;
 549         } while (data_to_rx);
 550
 551         return tmp;
 552 }
 553
 554 static void thor_tx_data(unsigned char *data, int len)
 555 {
 556         struct thor_dev *dev = thor_func->dev;
 557         unsigned char *ptr = dev->in_req->buf;
 558         int status;
 559
 560         memset(ptr, 0, len);
 561         memcpy(ptr, data, len);
 562
 563         dev->in_req->length = len;
 564
 565         debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__,
 566               dev->in_req->length, sizeof(data));
 567
 568         status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
 569         if (status) {
 570                 error("kill %s:  resubmit %d bytes --> %d",
 571                       dev->in_ep->name, dev->in_req->length, status);
 572                 usb_ep_set_halt(dev->in_ep);
 573         }
 574
 575         /* Wait until tx interrupt received */
 576         while (!dev->txdata)
 577                 usb_gadget_handle_interrupts();
 578
 579         dev->txdata = 0;
 580 }
 581
 582 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
 583 {
 584         struct thor_dev *dev = thor_func->dev;
 585         int status = req->status;
 586
 587         debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
 588         switch (status) {
 589         case 0:
 590                 if (ep == dev->out_ep)
 591                         dev->rxdata = 1;
 592                 else
 593                         dev->txdata = 1;
 594
 595                 break;
 596
 597         /* this endpoint is normally active while we're configured */
 598         case -ECONNABORTED:             /* hardware forced ep reset */
 599         case -ECONNRESET:               /* request dequeued */
 600         case -ESHUTDOWN:                /* disconnect from host */
 601         case -EREMOTEIO:                /* short read */
 602         case -EOVERFLOW:
 603                 error("ERROR:%d", status);
 604                 break;
 605         }
 606
 607         debug("%s complete --> %d, %d/%d\n", ep->name,
 608               status, req->actual, req->length);
 609 }
 610
 611 static struct usb_request *thor_start_ep(struct usb_ep *ep)
 612 {
 613         struct usb_request *req;
 614
 615         req = alloc_ep_req(ep, THOR_PACKET_SIZE);
 616         debug("%s: ep:%p req:%p\n", __func__, ep, req);
 617
 618         if (!req)
 619                 return NULL;
 620
 621         memset(req->buf, 0, req->length);
 622         req->complete = thor_rx_tx_complete;
 623
 624         return req;
 625 }
 626
 627 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
 628 {
 629         if (req->status || req->actual != req->length)
 630                 debug("setup complete --> %d, %d/%d\n",
 631                       req->status, req->actual, req->length);
 632 }
 633
 634 static int
 635 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 636 {
 637         struct thor_dev *dev = thor_func->dev;
 638         struct usb_request *req = dev->req;
 639         struct usb_gadget *gadget = dev->gadget;
 640         int value = 0;
 641
 642         u16 len = le16_to_cpu(ctrl->wLength);
 643
 644         debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
 645               ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
 646               ctrl->wLength);
 647
 648         switch (ctrl->bRequest) {
 649         case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 650                 value = 0;
 651                 break;
 652         case USB_CDC_REQ_SET_LINE_CODING:
 653                 value = len;
 654                 /* Line Coding set done = configuration done */
 655                 thor_func->dev->configuration_done = 1;
 656                 break;
 657
 658         default:
 659                 error("thor_setup: unknown request: %d", ctrl->bRequest);
 660         }
 661
 662         if (value >= 0) {
 663                 req->length = value;
 664                 req->zero = value < len;
 665                 value = usb_ep_queue(gadget->ep0, req, 0);
 666                 if (value < 0) {
 667                         debug("%s: ep_queue: %d\n", __func__, value);
 668                         req->status = 0;
 669                 }
 670         }
 671
 672         return value;
 673 }
 674
 675 /* Specific to the THOR protocol */
 676 static void thor_set_dma(void *addr, int len)
 677 {
 678         struct thor_dev *dev = thor_func->dev;
 679
 680         debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
 681         debug("addr:%p, len:%d\n", addr, len);
 682
 683         dev->out_req->buf = addr;
 684         dev->out_req->length = len;
 685 }
 686
 687 int thor_init(void)
 688 {
 689         struct thor_dev *dev = thor_func->dev;
 690
 691         /* Wait for a device enumeration and configuration settings */
 692         debug("THOR enumeration/configuration setting....\n");
 693         while (!dev->configuration_done)
 694                 usb_gadget_handle_interrupts();
 695
 696         thor_set_dma(thor_rx_data_buf, strlen("THOR"));
 697         /* detect the download request from Host PC */
 698         if (thor_rx_data() < 0) {
 699                 printf("%s: Data not received!\n", __func__);
 700                 return -1;
 701         }
 702
 703         if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) {
 704                 puts("Download request from the Host PC\n");
 705                 udelay(30 * 1000); /* 30 ms */
 706
 707                 strcpy((char *)thor_tx_data_buf, "ROHT");
 708                 thor_tx_data(thor_tx_data_buf, strlen("ROHT"));
 709         } else {
 710                 puts("Wrong reply information\n");
 711                 return -1;
 712         }
 713
 714         return 0;
 715 }
 716
 717 int thor_handle(void)
 718 {
 719         int ret;
 720
 721         /* receive the data from Host PC */
 722         while (1) {
 723                 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
 724                 ret = thor_rx_data();
 725
 726                 if (ret > 0) {
 727                         ret = process_data();
 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 int thor_func_bind(struct usb_configuration *c, struct usb_function *f)
 740 {
 741         struct usb_gadget *gadget = c->cdev->gadget;
 742         struct f_thor *f_thor = func_to_thor(f);
 743         struct thor_dev *dev;
 744         struct usb_ep *ep;
 745         int status;
 746
 747         thor_func = f_thor;
 748         dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev));
 749         if (!dev)
 750                 return -ENOMEM;
 751
 752         memset(dev, 0, sizeof(*dev));
 753         dev->gadget = gadget;
 754         f_thor->dev = dev;
 755
 756         debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n",
 757               __func__, c, f);
 758         debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev);
 759
 760         /* EP0  */
 761         /* preallocate control response and buffer */
 762         dev->req = usb_ep_alloc_request(gadget->ep0, 0);
 763         if (!dev->req) {
 764                 status = -ENOMEM;
 765                 goto fail;
 766         }
 767         dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
 768                                  gadget->ep0->maxpacket);
 769         if (!dev->req->buf) {
 770                 status = -ENOMEM;
 771                 goto fail;
 772         }
 773
 774         dev->req->complete = thor_setup_complete;
 775
 776         /* DYNAMIC interface numbers assignments */
 777         status = usb_interface_id(c, f);
 778
 779         if (status < 0)
 780                 goto fail;
 781
 782         thor_downloader_intf_int.bInterfaceNumber = status;
 783         thor_downloader_cdc_union.bMasterInterface0 = status;
 784
 785         status = usb_interface_id(c, f);
 786
 787         if (status < 0)
 788                 goto fail;
 789
 790         thor_downloader_intf_data.bInterfaceNumber = status;
 791         thor_downloader_cdc_union.bSlaveInterface0 = status;
 792
 793         /* allocate instance-specific endpoints */
 794         ep = usb_ep_autoconfig(gadget, &fs_in_desc);
 795         if (!ep) {
 796                 status = -ENODEV;
 797                 goto fail;
 798         }
 799
 800         if (gadget_is_dualspeed(gadget)) {
 801                 hs_in_desc.bEndpointAddress =
 802                                 fs_in_desc.bEndpointAddress;
 803         }
 804
 805         dev->in_ep = ep; /* Store IN EP for enabling @ setup */
 806
 807         ep = usb_ep_autoconfig(gadget, &fs_out_desc);
 808         if (!ep) {
 809                 status = -ENODEV;
 810                 goto fail;
 811         }
 812
 813         if (gadget_is_dualspeed(gadget))
 814                 hs_out_desc.bEndpointAddress =
 815                                 fs_out_desc.bEndpointAddress;
 816
 817         dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
 818
 819         ep = usb_ep_autoconfig(gadget, &fs_int_desc);
 820         if (!ep) {
 821                 status = -ENODEV;
 822                 goto fail;
 823         }
 824
 825         dev->int_ep = ep;
 826
 827         if (gadget_is_dualspeed(gadget)) {
 828                 hs_int_desc.bEndpointAddress =
 829                                 fs_int_desc.bEndpointAddress;
 830
 831                 f->hs_descriptors = (struct usb_descriptor_header **)
 832                         &hs_thor_downloader_function;
 833
 834                 if (!f->hs_descriptors)
 835                         goto fail;
 836         }
 837
 838         debug("%s: out_ep:%p out_req:%p\n", __func__,
 839               dev->out_ep, dev->out_req);
 840
 841         return 0;
 842
 843  fail:
 844         free(dev);
 845         return status;
 846 }
 847
 848 static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
 849 {
 850         free(req->buf);
 851         usb_ep_free_request(ep, req);
 852 }
 853
 854 static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
 855 {
 856         struct f_thor *f_thor = func_to_thor(f);
 857         struct thor_dev *dev = f_thor->dev;
 858
 859         free(dev);
 860         memset(thor_func, 0, sizeof(*thor_func));
 861         thor_func = NULL;
 862 }
 863
 864 static void thor_func_disable(struct usb_function *f)
 865 {
 866         struct f_thor *f_thor = func_to_thor(f);
 867         struct thor_dev *dev = f_thor->dev;
 868
 869         debug("%s:\n", __func__);
 870
 871         /* Avoid freeing memory when ep is still claimed */
 872         if (dev->in_ep->driver_data) {
 873                 free_ep_req(dev->in_ep, dev->in_req);
 874                 usb_ep_disable(dev->in_ep);
 875                 dev->in_ep->driver_data = NULL;
 876         }
 877
 878         if (dev->out_ep->driver_data) {
 879                 dev->out_req->buf = NULL;
 880                 usb_ep_free_request(dev->out_ep, dev->out_req);
 881                 usb_ep_disable(dev->out_ep);
 882                 dev->out_ep->driver_data = NULL;
 883         }
 884
 885         if (dev->int_ep->driver_data) {
 886                 usb_ep_disable(dev->int_ep);
 887                 dev->int_ep->driver_data = NULL;
 888         }
 889 }
 890
 891 static int thor_eps_setup(struct usb_function *f)
 892 {
 893         struct usb_composite_dev *cdev = f->config->cdev;
 894         struct usb_gadget *gadget = cdev->gadget;
 895         struct thor_dev *dev = thor_func->dev;
 896         struct usb_endpoint_descriptor *d;
 897         struct usb_request *req;
 898         struct usb_ep *ep;
 899         int result;
 900
 901         ep = dev->in_ep;
 902         d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
 903         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 904
 905         result = usb_ep_enable(ep, d);
 906         if (result)
 907                 goto exit;
 908
 909         ep->driver_data = cdev; /* claim */
 910         req = thor_start_ep(ep);
 911         if (!req) {
 912                 usb_ep_disable(ep);
 913                 result = -EIO;
 914                 goto exit;
 915         }
 916
 917         dev->in_req = req;
 918         ep = dev->out_ep;
 919         d = ep_desc(gadget, &hs_out_desc, &fs_out_desc);
 920         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 921
 922         result = usb_ep_enable(ep, d);
 923         if (result)
 924                 goto exit;
 925
 926         ep->driver_data = cdev; /* claim */
 927         req = thor_start_ep(ep);
 928         if (!req) {
 929                 usb_ep_disable(ep);
 930                 result = -EIO;
 931                 goto exit;
 932         }
 933
 934         dev->out_req = req;
 935         /* ACM control EP */
 936         ep = dev->int_ep;
 937         ep->driver_data = cdev; /* claim */
 938
 939  exit:
 940         return result;
 941 }
 942
 943 static int thor_func_set_alt(struct usb_function *f,
 944                              unsigned intf, unsigned alt)
 945 {
 946         struct thor_dev *dev = thor_func->dev;
 947         int result;
 948
 949         debug("%s: func: %s intf: %d alt: %d\n",
 950               __func__, f->name, intf, alt);
 951
 952         switch (intf) {
 953         case 0:
 954                 debug("ACM INTR interface\n");
 955                 break;
 956         case 1:
 957                 debug("Communication Data interface\n");
 958                 result = thor_eps_setup(f);
 959                 if (result)
 960                         error("%s: EPs setup failed!", __func__);
 961                 dev->configuration_done = 1;
 962                 break;
 963         }
 964
 965         return 0;
 966 }
 967
 968 static int thor_func_init(struct usb_configuration *c)
 969 {
 970         struct f_thor *f_thor;
 971         int status;
 972
 973         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 974
 975         f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
 976         if (!f_thor)
 977                 return -ENOMEM;
 978
 979         memset(f_thor, 0, sizeof(*f_thor));
 980
 981         f_thor->usb_function.name = "f_thor";
 982         f_thor->usb_function.bind = thor_func_bind;
 983         f_thor->usb_function.unbind = thor_unbind;
 984         f_thor->usb_function.setup = thor_func_setup;
 985         f_thor->usb_function.set_alt = thor_func_set_alt;
 986         f_thor->usb_function.disable = thor_func_disable;
 987
 988         status = usb_add_function(c, &f_thor->usb_function);
 989         if (status)
 990                 free(f_thor);
 991
 992         return status;
 993 }
 994
 995 int thor_add(struct usb_configuration *c)
 996 {
 997         debug("%s:\n", __func__);
 998         return thor_func_init(c);
 999 }
1000
1001 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add);