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