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