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" DFU storage backend requires dfu_write with
 223          * size parameter equal to 0
 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_write(dfu_entity, transfer_buffer, 0, cnt);
 229         if (ret)
 230                 error("DFU write failed [%d] cnt: %d", ret, cnt);
 231
 232         ret = dfu_flush(dfu_entity, transfer_buffer, 0, cnt);
 233         if (ret) {
 234                 error("DFU flush failed!");
 235                 return ret;
 236         }
 237
 238         return ret;
 239 }
 240
 241 static long long int process_rqt_download(const struct rqt_box *rqt)
 242 {
 243         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
 244         static long long int left, ret_head;
 245         int file_type, ret = 0;
 246         static int cnt;
 247
 248         memset(rsp, 0, sizeof(struct rsp_box));
 249         rsp->rsp = rqt->rqt;
 250         rsp->rsp_data = rqt->rqt_data;
 251
 252         switch (rqt->rqt_data) {
 253         case RQT_DL_INIT:
 254                 thor_file_size = rqt->int_data[0];
 255                 debug("INIT: total %d bytes\n", rqt->int_data[0]);
 256                 break;
 257         case RQT_DL_FILE_INFO:
 258                 file_type = rqt->int_data[0];
 259                 if (file_type == FILE_TYPE_PIT) {
 260                         puts("PIT table file - not supported\n");
 261                         rsp->ack = -ENOTSUPP;
 262                         ret = rsp->ack;
 263                         break;
 264                 }
 265
 266                 thor_file_size = rqt->int_data[1];
 267                 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE);
 268
 269                 debug("INFO: name(%s, %d), size(%llu), type(%d)\n",
 270                       f_name, 0, thor_file_size, file_type);
 271
 272                 rsp->int_data[0] = THOR_PACKET_SIZE;
 273
 274                 alt_setting_num = dfu_get_alt(f_name);
 275                 if (alt_setting_num < 0) {
 276                         error("Alt setting [%d] to write not found!",
 277                               alt_setting_num);
 278                         rsp->ack = -ENODEV;
 279                         ret = rsp->ack;
 280                 }
 281                 break;
 282         case RQT_DL_FILE_START:
 283                 send_rsp(rsp);
 284                 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE,
 285                                          &left, &cnt);
 286                 if (ret_head < 0) {
 287                         left = 0;
 288                         cnt = 0;
 289                 }
 290                 return ret_head;
 291         case RQT_DL_FILE_END:
 292                 debug("DL FILE_END\n");
 293                 rsp->ack = download_tail(left, cnt);
 294                 ret = rsp->ack;
 295                 left = 0;
 296                 cnt = 0;
 297                 break;
 298         case RQT_DL_EXIT:
 299                 debug("DL EXIT\n");
 300                 break;
 301         default:
 302                 error("Operation not supported: %d", rqt->rqt_data);
 303                 ret = -ENOTSUPP;
 304         }
 305
 306         send_rsp(rsp);
 307         return ret;
 308 }
 309
 310 static int process_data(void)
 311 {
 312         ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box));
 313         int ret = -EINVAL;
 314
 315         memset(rqt, 0, sizeof(rqt));
 316         memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
 317
 318         debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
 319
 320         switch (rqt->rqt) {
 321         case RQT_INFO:
 322                 ret = process_rqt_info(rqt);
 323                 break;
 324         case RQT_CMD:
 325                 ret = process_rqt_cmd(rqt);
 326                 break;
 327         case RQT_DL:
 328                 ret = (int) process_rqt_download(rqt);
 329                 break;
 330         case RQT_UL:
 331                 puts("RQT: UPLOAD not supported!\n");
 332                 break;
 333         default:
 334                 error("unknown request (%d)", rqt->rqt);
 335         }
 336
 337         return ret;
 338 }
 339
 340 /* ********************************************************** */
 341 /*         THOR USB Function                                  */
 342 /* ********************************************************** */
 343
 344 static inline struct usb_endpoint_descriptor *
 345 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
 346         struct usb_endpoint_descriptor *fs)
 347 {
 348         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 349                 return hs;
 350         return fs;
 351 }
 352
 353 static struct usb_interface_descriptor thor_downloader_intf_data = {
 354         .bLength =              sizeof(thor_downloader_intf_data),
 355         .bDescriptorType =      USB_DT_INTERFACE,
 356
 357         .bNumEndpoints =        2,
 358         .bInterfaceClass =      USB_CLASS_CDC_DATA,
 359 };
 360
 361 static struct usb_endpoint_descriptor fs_in_desc = {
 362         .bLength =              USB_DT_ENDPOINT_SIZE,
 363         .bDescriptorType =      USB_DT_ENDPOINT,
 364
 365         .bEndpointAddress =     USB_DIR_IN,
 366         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 367 };
 368
 369 static struct usb_endpoint_descriptor fs_out_desc = {
 370         .bLength =              USB_DT_ENDPOINT_SIZE,
 371         .bDescriptorType =      USB_DT_ENDPOINT,
 372
 373         .bEndpointAddress =     USB_DIR_OUT,
 374         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 375 };
 376
 377 /* CDC configuration */
 378 static struct usb_interface_descriptor thor_downloader_intf_int = {
 379         .bLength =              sizeof(thor_downloader_intf_int),
 380         .bDescriptorType =      USB_DT_INTERFACE,
 381
 382         .bNumEndpoints =        1,
 383         .bInterfaceClass =      USB_CLASS_COMM,
 384          /* 0x02 Abstract Line Control Model */
 385         .bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
 386         /* 0x01 Common AT commands */
 387         .bInterfaceProtocol =   USB_CDC_ACM_PROTO_AT_V25TER,
 388 };
 389
 390 static struct usb_cdc_header_desc thor_downloader_cdc_header = {
 391         .bLength         =    sizeof(thor_downloader_cdc_header),
 392         .bDescriptorType =    0x24, /* CS_INTERFACE */
 393         .bDescriptorSubType = 0x00,
 394         .bcdCDC =             0x0110,
 395 };
 396
 397 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
 398         .bLength         =    sizeof(thor_downloader_cdc_call),
 399         .bDescriptorType =    0x24, /* CS_INTERFACE */
 400         .bDescriptorSubType = 0x01,
 401         .bmCapabilities =     0x00,
 402         .bDataInterface =     0x01,
 403 };
 404
 405 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
 406         .bLength         =    sizeof(thor_downloader_cdc_abstract),
 407         .bDescriptorType =    0x24, /* CS_INTERFACE */
 408         .bDescriptorSubType = 0x02,
 409         .bmCapabilities =     0x00,
 410 };
 411
 412 static struct usb_cdc_union_desc thor_downloader_cdc_union = {
 413         .bLength         =     sizeof(thor_downloader_cdc_union),
 414         .bDescriptorType =     0x24, /* CS_INTERFACE */
 415         .bDescriptorSubType =  USB_CDC_UNION_TYPE,
 416 };
 417
 418 static struct usb_endpoint_descriptor fs_int_desc = {
 419         .bLength = USB_DT_ENDPOINT_SIZE,
 420         .bDescriptorType = USB_DT_ENDPOINT,
 421
 422         .bEndpointAddress = 3 | USB_DIR_IN,
 423         .bmAttributes = USB_ENDPOINT_XFER_INT,
 424         .wMaxPacketSize = __constant_cpu_to_le16(16),
 425
 426         .bInterval = 0x9,
 427 };
 428
 429 static struct usb_interface_assoc_descriptor
 430 thor_iad_descriptor = {
 431         .bLength =              sizeof(thor_iad_descriptor),
 432         .bDescriptorType =      USB_DT_INTERFACE_ASSOCIATION,
 433
 434         .bFirstInterface =      0,
 435         .bInterfaceCount =      2,      /* control + data */
 436         .bFunctionClass =       USB_CLASS_COMM,
 437         .bFunctionSubClass =    USB_CDC_SUBCLASS_ACM,
 438         .bFunctionProtocol =    USB_CDC_PROTO_NONE,
 439 };
 440
 441 static struct usb_endpoint_descriptor hs_in_desc = {
 442         .bLength =              USB_DT_ENDPOINT_SIZE,
 443         .bDescriptorType =      USB_DT_ENDPOINT,
 444
 445         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 446         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 447 };
 448
 449 static struct usb_endpoint_descriptor hs_out_desc = {
 450         .bLength =              USB_DT_ENDPOINT_SIZE,
 451         .bDescriptorType =      USB_DT_ENDPOINT,
 452
 453         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 454         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 455 };
 456
 457 static struct usb_endpoint_descriptor hs_int_desc = {
 458         .bLength = USB_DT_ENDPOINT_SIZE,
 459         .bDescriptorType = USB_DT_ENDPOINT,
 460
 461         .bmAttributes = USB_ENDPOINT_XFER_INT,
 462         .wMaxPacketSize = __constant_cpu_to_le16(16),
 463
 464         .bInterval = 0x9,
 465 };
 466
 467 static struct usb_qualifier_descriptor dev_qualifier = {
 468         .bLength =              sizeof(dev_qualifier),
 469         .bDescriptorType =      USB_DT_DEVICE_QUALIFIER,
 470
 471         .bcdUSB =               __constant_cpu_to_le16(0x0200),
 472         .bDeviceClass = USB_CLASS_VENDOR_SPEC,
 473
 474         .bNumConfigurations =   2,
 475 };
 476
 477 /*
 478  * This attribute vendor descriptor is necessary for correct operation with
 479  * Windows version of THOR download program
 480  *
 481  * It prevents windows driver from sending zero lenght packet (ZLP) after
 482  * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
 483  */
 484 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
 485         .bLength =              sizeof(thor_downloader_cdc_av),
 486         .bDescriptorType =      0x24,
 487         .bDescriptorSubType =   0x80,
 488         .DAUType =              0x0002,
 489         .DAULength =            0x0001,
 490         .DAUValue =             0x00,
 491 };
 492
 493 static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
 494         (struct usb_descriptor_header *)&thor_iad_descriptor,
 495
 496         (struct usb_descriptor_header *)&thor_downloader_intf_int,
 497         (struct usb_descriptor_header *)&thor_downloader_cdc_header,
 498         (struct usb_descriptor_header *)&thor_downloader_cdc_call,
 499         (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
 500         (struct usb_descriptor_header *)&thor_downloader_cdc_union,
 501         (struct usb_descriptor_header *)&hs_int_desc,
 502
 503         (struct usb_descriptor_header *)&thor_downloader_intf_data,
 504         (struct usb_descriptor_header *)&thor_downloader_cdc_av,
 505         (struct usb_descriptor_header *)&hs_in_desc,
 506         (struct usb_descriptor_header *)&hs_out_desc,
 507         NULL,
 508 };
 509
 510 /*-------------------------------------------------------------------------*/
 511 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
 512 {
 513         struct usb_request *req;
 514
 515         req = usb_ep_alloc_request(ep, 0);
 516         if (!req)
 517                 return req;
 518
 519         req->length = length;
 520         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
 521         if (!req->buf) {
 522                 usb_ep_free_request(ep, req);
 523                 req = NULL;
 524         }
 525
 526         return req;
 527 }
 528
 529 static int thor_rx_data(void)
 530 {
 531         struct thor_dev *dev = thor_func->dev;
 532         int data_to_rx, tmp, status;
 533
 534         data_to_rx = dev->out_req->length;
 535         tmp = data_to_rx;
 536         do {
 537                 dev->out_req->length = data_to_rx;
 538                 debug("dev->out_req->length:%d dev->rxdata:%d\n",
 539                       dev->out_req->length, dev->rxdata);
 540
 541                 status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
 542                 if (status) {
 543                         error("kill %s:  resubmit %d bytes --> %d",
 544                               dev->out_ep->name, dev->out_req->length, status);
 545                         usb_ep_set_halt(dev->out_ep);
 546                         return -EAGAIN;
 547                 }
 548
 549                 while (!dev->rxdata) {
 550                         usb_gadget_handle_interrupts();
 551                         if (ctrlc())
 552                                 return -1;
 553                 }
 554                 dev->rxdata = 0;
 555                 data_to_rx -= dev->out_req->actual;
 556         } while (data_to_rx);
 557
 558         return tmp;
 559 }
 560
 561 static void thor_tx_data(unsigned char *data, int len)
 562 {
 563         struct thor_dev *dev = thor_func->dev;
 564         unsigned char *ptr = dev->in_req->buf;
 565         int status;
 566
 567         memset(ptr, 0, len);
 568         memcpy(ptr, data, len);
 569
 570         dev->in_req->length = len;
 571
 572         debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__,
 573               dev->in_req->length, sizeof(data));
 574
 575         status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
 576         if (status) {
 577                 error("kill %s:  resubmit %d bytes --> %d",
 578                       dev->in_ep->name, dev->in_req->length, status);
 579                 usb_ep_set_halt(dev->in_ep);
 580         }
 581
 582         /* Wait until tx interrupt received */
 583         while (!dev->txdata)
 584                 usb_gadget_handle_interrupts();
 585
 586         dev->txdata = 0;
 587 }
 588
 589 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
 590 {
 591         struct thor_dev *dev = thor_func->dev;
 592         int status = req->status;
 593
 594         debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
 595         switch (status) {
 596         case 0:
 597                 if (ep == dev->out_ep)
 598                         dev->rxdata = 1;
 599                 else
 600                         dev->txdata = 1;
 601
 602                 break;
 603
 604         /* this endpoint is normally active while we're configured */
 605         case -ECONNABORTED:             /* hardware forced ep reset */
 606         case -ECONNRESET:               /* request dequeued */
 607         case -ESHUTDOWN:                /* disconnect from host */
 608         case -EREMOTEIO:                /* short read */
 609         case -EOVERFLOW:
 610                 error("ERROR:%d", status);
 611                 break;
 612         }
 613
 614         debug("%s complete --> %d, %d/%d\n", ep->name,
 615               status, req->actual, req->length);
 616 }
 617
 618 static struct usb_request *thor_start_ep(struct usb_ep *ep)
 619 {
 620         struct usb_request *req;
 621
 622         req = alloc_ep_req(ep, THOR_PACKET_SIZE);
 623         debug("%s: ep:%p req:%p\n", __func__, ep, req);
 624
 625         if (!req)
 626                 return NULL;
 627
 628         memset(req->buf, 0, req->length);
 629         req->complete = thor_rx_tx_complete;
 630
 631         return req;
 632 }
 633
 634 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
 635 {
 636         if (req->status || req->actual != req->length)
 637                 debug("setup complete --> %d, %d/%d\n",
 638                       req->status, req->actual, req->length);
 639 }
 640
 641 static int
 642 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 643 {
 644         struct thor_dev *dev = thor_func->dev;
 645         struct usb_request *req = dev->req;
 646         struct usb_gadget *gadget = dev->gadget;
 647         int value = 0;
 648
 649         u16 len = le16_to_cpu(ctrl->wLength);
 650
 651         debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
 652               ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
 653               ctrl->wLength);
 654
 655         switch (ctrl->bRequest) {
 656         case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 657                 value = 0;
 658                 break;
 659         case USB_CDC_REQ_SET_LINE_CODING:
 660                 value = len;
 661                 /* Line Coding set done = configuration done */
 662                 thor_func->dev->configuration_done = 1;
 663                 break;
 664
 665         default:
 666                 error("thor_setup: unknown request: %d", ctrl->bRequest);
 667         }
 668
 669         if (value >= 0) {
 670                 req->length = value;
 671                 req->zero = value < len;
 672                 value = usb_ep_queue(gadget->ep0, req, 0);
 673                 if (value < 0) {
 674                         debug("%s: ep_queue: %d\n", __func__, value);
 675                         req->status = 0;
 676                 }
 677         }
 678
 679         return value;
 680 }
 681
 682 /* Specific to the THOR protocol */
 683 static void thor_set_dma(void *addr, int len)
 684 {
 685         struct thor_dev *dev = thor_func->dev;
 686
 687         debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
 688         debug("addr:%p, len:%d\n", addr, len);
 689
 690         dev->out_req->buf = addr;
 691         dev->out_req->length = len;
 692 }
 693
 694 int thor_init(void)
 695 {
 696         struct thor_dev *dev = thor_func->dev;
 697
 698         /* Wait for a device enumeration and configuration settings */
 699         debug("THOR enumeration/configuration setting....\n");
 700         while (!dev->configuration_done)
 701                 usb_gadget_handle_interrupts();
 702
 703         thor_set_dma(thor_rx_data_buf, strlen("THOR"));
 704         /* detect the download request from Host PC */
 705         if (thor_rx_data() < 0) {
 706                 printf("%s: Data not received!\n", __func__);
 707                 return -1;
 708         }
 709
 710         if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) {
 711                 puts("Download request from the Host PC\n");
 712                 udelay(30 * 1000); /* 30 ms */
 713
 714                 strcpy((char *)thor_tx_data_buf, "ROHT");
 715                 thor_tx_data(thor_tx_data_buf, strlen("ROHT"));
 716         } else {
 717                 puts("Wrong reply information\n");
 718                 return -1;
 719         }
 720
 721         return 0;
 722 }
 723
 724 int thor_handle(void)
 725 {
 726         int ret;
 727
 728         /* receive the data from Host PC */
 729         while (1) {
 730                 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
 731                 ret = thor_rx_data();
 732
 733                 if (ret > 0) {
 734                         ret = process_data();
 735                         if (ret < 0)
 736                                 return ret;
 737                 } else {
 738                         printf("%s: No data received!\n", __func__);
 739                         break;
 740                 }
 741         }
 742
 743         return 0;
 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                                  gadget->ep0->maxpacket);
 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
 814         ep = usb_ep_autoconfig(gadget, &fs_out_desc);
 815         if (!ep) {
 816                 status = -ENODEV;
 817                 goto fail;
 818         }
 819
 820         if (gadget_is_dualspeed(gadget))
 821                 hs_out_desc.bEndpointAddress =
 822                                 fs_out_desc.bEndpointAddress;
 823
 824         dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
 825
 826         ep = usb_ep_autoconfig(gadget, &fs_int_desc);
 827         if (!ep) {
 828                 status = -ENODEV;
 829                 goto fail;
 830         }
 831
 832         dev->int_ep = ep;
 833
 834         if (gadget_is_dualspeed(gadget)) {
 835                 hs_int_desc.bEndpointAddress =
 836                                 fs_int_desc.bEndpointAddress;
 837
 838                 f->hs_descriptors = (struct usb_descriptor_header **)
 839                         &hs_thor_downloader_function;
 840
 841                 if (!f->hs_descriptors)
 842                         goto fail;
 843         }
 844
 845         debug("%s: out_ep:%p out_req:%p\n", __func__,
 846               dev->out_ep, dev->out_req);
 847
 848         return 0;
 849
 850  fail:
 851         free(dev);
 852         return status;
 853 }
 854
 855 static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
 856 {
 857         free(req->buf);
 858         usb_ep_free_request(ep, req);
 859 }
 860
 861 static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
 862 {
 863         struct f_thor *f_thor = func_to_thor(f);
 864         struct thor_dev *dev = f_thor->dev;
 865
 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                 dev->out_req->buf = NULL;
 887                 usb_ep_free_request(dev->out_ep, dev->out_req);
 888                 usb_ep_disable(dev->out_ep);
 889                 dev->out_ep->driver_data = NULL;
 890         }
 891
 892         if (dev->int_ep->driver_data) {
 893                 usb_ep_disable(dev->int_ep);
 894                 dev->int_ep->driver_data = NULL;
 895         }
 896 }
 897
 898 static int thor_eps_setup(struct usb_function *f)
 899 {
 900         struct usb_composite_dev *cdev = f->config->cdev;
 901         struct usb_gadget *gadget = cdev->gadget;
 902         struct thor_dev *dev = thor_func->dev;
 903         struct usb_endpoint_descriptor *d;
 904         struct usb_request *req;
 905         struct usb_ep *ep;
 906         int result;
 907
 908         ep = dev->in_ep;
 909         d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
 910         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 911
 912         result = usb_ep_enable(ep, d);
 913         if (result)
 914                 goto exit;
 915
 916         ep->driver_data = cdev; /* claim */
 917         req = thor_start_ep(ep);
 918         if (!req) {
 919                 usb_ep_disable(ep);
 920                 result = -EIO;
 921                 goto exit;
 922         }
 923
 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 exit;
 932
 933         ep->driver_data = cdev; /* claim */
 934         req = thor_start_ep(ep);
 935         if (!req) {
 936                 usb_ep_disable(ep);
 937                 result = -EIO;
 938                 goto exit;
 939         }
 940
 941         dev->out_req = req;
 942         /* ACM control EP */
 943         ep = dev->int_ep;
 944         ep->driver_data = cdev; /* claim */
 945
 946  exit:
 947         return result;
 948 }
 949
 950 static int thor_func_set_alt(struct usb_function *f,
 951                              unsigned intf, unsigned alt)
 952 {
 953         struct thor_dev *dev = thor_func->dev;
 954         int result;
 955
 956         debug("%s: func: %s intf: %d alt: %d\n",
 957               __func__, f->name, intf, alt);
 958
 959         switch (intf) {
 960         case 0:
 961                 debug("ACM INTR interface\n");
 962                 break;
 963         case 1:
 964                 debug("Communication Data interface\n");
 965                 result = thor_eps_setup(f);
 966                 if (result)
 967                         error("%s: EPs setup failed!", __func__);
 968                 dev->configuration_done = 1;
 969                 break;
 970         }
 971
 972         return 0;
 973 }
 974
 975 static int thor_func_init(struct usb_configuration *c)
 976 {
 977         struct f_thor *f_thor;
 978         int status;
 979
 980         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 981
 982         f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
 983         if (!f_thor)
 984                 return -ENOMEM;
 985
 986         memset(f_thor, 0, sizeof(*f_thor));
 987
 988         f_thor->usb_function.name = "f_thor";
 989         f_thor->usb_function.bind = thor_func_bind;
 990         f_thor->usb_function.unbind = thor_unbind;
 991         f_thor->usb_function.setup = thor_func_setup;
 992         f_thor->usb_function.set_alt = thor_func_set_alt;
 993         f_thor->usb_function.disable = thor_func_disable;
 994
 995         status = usb_add_function(c, &f_thor->usb_function);
 996         if (status)
 997                 free(f_thor);
 998
 999         return status;
1000 }
1001
1002 int thor_add(struct usb_configuration *c)
1003 {
1004         debug("%s:\n", __func__);
1005         return thor_func_init(c);
1006 }
1007
1008 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add);