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         void *transfer_buffer = dfu_get_buf();
 208         int ret;
 209
 210         debug("%s: left: %llu cnt: %d\n", __func__, left, cnt);
 211
 212         if (left) {
 213                 ret = dfu_write(dfu_get_entity(alt_setting_num),
 214                                 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_get_entity(alt_setting_num),
 229                         transfer_buffer, 0, cnt);
 230         if (ret)
 231                 error("DFU write failed [%d] cnt: %d", ret, cnt);
 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         memset(rqt, 0, sizeof(rqt));
 311         memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
 312
 313         debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
 314
 315         switch (rqt->rqt) {
 316         case RQT_INFO:
 317                 ret = process_rqt_info(rqt);
 318                 break;
 319         case RQT_CMD:
 320                 ret = process_rqt_cmd(rqt);
 321                 break;
 322         case RQT_DL:
 323                 ret = (int) process_rqt_download(rqt);
 324                 break;
 325         case RQT_UL:
 326                 puts("RQT: UPLOAD not supported!\n");
 327                 break;
 328         default:
 329                 error("unknown request (%d)", rqt->rqt);
 330         }
 331
 332         return ret;
 333 }
 334
 335 /* ********************************************************** */
 336 /*         THOR USB Function                                  */
 337 /* ********************************************************** */
 338
 339 static inline struct usb_endpoint_descriptor *
 340 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
 341         struct usb_endpoint_descriptor *fs)
 342 {
 343         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 344                 return hs;
 345         return fs;
 346 }
 347
 348 static struct usb_interface_descriptor thor_downloader_intf_data = {
 349         .bLength =              sizeof(thor_downloader_intf_data),
 350         .bDescriptorType =      USB_DT_INTERFACE,
 351
 352         .bNumEndpoints =        2,
 353         .bInterfaceClass =      USB_CLASS_CDC_DATA,
 354 };
 355
 356 static struct usb_endpoint_descriptor fs_in_desc = {
 357         .bLength =              USB_DT_ENDPOINT_SIZE,
 358         .bDescriptorType =      USB_DT_ENDPOINT,
 359
 360         .bEndpointAddress =     USB_DIR_IN,
 361         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 362 };
 363
 364 static struct usb_endpoint_descriptor fs_out_desc = {
 365         .bLength =              USB_DT_ENDPOINT_SIZE,
 366         .bDescriptorType =      USB_DT_ENDPOINT,
 367
 368         .bEndpointAddress =     USB_DIR_OUT,
 369         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 370 };
 371
 372 /* CDC configuration */
 373 static struct usb_interface_descriptor thor_downloader_intf_int = {
 374         .bLength =              sizeof(thor_downloader_intf_int),
 375         .bDescriptorType =      USB_DT_INTERFACE,
 376
 377         .bNumEndpoints =        1,
 378         .bInterfaceClass =      USB_CLASS_COMM,
 379          /* 0x02 Abstract Line Control Model */
 380         .bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
 381         /* 0x01 Common AT commands */
 382         .bInterfaceProtocol =   USB_CDC_ACM_PROTO_AT_V25TER,
 383 };
 384
 385 static struct usb_cdc_header_desc thor_downloader_cdc_header = {
 386         .bLength         =    sizeof(thor_downloader_cdc_header),
 387         .bDescriptorType =    0x24, /* CS_INTERFACE */
 388         .bDescriptorSubType = 0x00,
 389         .bcdCDC =             0x0110,
 390 };
 391
 392 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
 393         .bLength         =    sizeof(thor_downloader_cdc_call),
 394         .bDescriptorType =    0x24, /* CS_INTERFACE */
 395         .bDescriptorSubType = 0x01,
 396         .bmCapabilities =     0x00,
 397         .bDataInterface =     0x01,
 398 };
 399
 400 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
 401         .bLength         =    sizeof(thor_downloader_cdc_abstract),
 402         .bDescriptorType =    0x24, /* CS_INTERFACE */
 403         .bDescriptorSubType = 0x02,
 404         .bmCapabilities =     0x00,
 405 };
 406
 407 static struct usb_cdc_union_desc thor_downloader_cdc_union = {
 408         .bLength         =     sizeof(thor_downloader_cdc_union),
 409         .bDescriptorType =     0x24, /* CS_INTERFACE */
 410         .bDescriptorSubType =  USB_CDC_UNION_TYPE,
 411 };
 412
 413 static struct usb_endpoint_descriptor fs_int_desc = {
 414         .bLength = USB_DT_ENDPOINT_SIZE,
 415         .bDescriptorType = USB_DT_ENDPOINT,
 416
 417         .bEndpointAddress = 3 | USB_DIR_IN,
 418         .bmAttributes = USB_ENDPOINT_XFER_INT,
 419         .wMaxPacketSize = __constant_cpu_to_le16(16),
 420
 421         .bInterval = 0x9,
 422 };
 423
 424 static struct usb_interface_assoc_descriptor
 425 thor_iad_descriptor = {
 426         .bLength =              sizeof(thor_iad_descriptor),
 427         .bDescriptorType =      USB_DT_INTERFACE_ASSOCIATION,
 428
 429         .bFirstInterface =      0,
 430         .bInterfaceCount =      2,      /* control + data */
 431         .bFunctionClass =       USB_CLASS_COMM,
 432         .bFunctionSubClass =    USB_CDC_SUBCLASS_ACM,
 433         .bFunctionProtocol =    USB_CDC_PROTO_NONE,
 434 };
 435
 436 static struct usb_endpoint_descriptor hs_in_desc = {
 437         .bLength =              USB_DT_ENDPOINT_SIZE,
 438         .bDescriptorType =      USB_DT_ENDPOINT,
 439
 440         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 441         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 442 };
 443
 444 static struct usb_endpoint_descriptor hs_out_desc = {
 445         .bLength =              USB_DT_ENDPOINT_SIZE,
 446         .bDescriptorType =      USB_DT_ENDPOINT,
 447
 448         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 449         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 450 };
 451
 452 static struct usb_endpoint_descriptor hs_int_desc = {
 453         .bLength = USB_DT_ENDPOINT_SIZE,
 454         .bDescriptorType = USB_DT_ENDPOINT,
 455
 456         .bmAttributes = USB_ENDPOINT_XFER_INT,
 457         .wMaxPacketSize = __constant_cpu_to_le16(16),
 458
 459         .bInterval = 0x9,
 460 };
 461
 462 static struct usb_qualifier_descriptor dev_qualifier = {
 463         .bLength =              sizeof(dev_qualifier),
 464         .bDescriptorType =      USB_DT_DEVICE_QUALIFIER,
 465
 466         .bcdUSB =               __constant_cpu_to_le16(0x0200),
 467         .bDeviceClass = USB_CLASS_VENDOR_SPEC,
 468
 469         .bNumConfigurations =   2,
 470 };
 471
 472 /*
 473  * This attribute vendor descriptor is necessary for correct operation with
 474  * Windows version of THOR download program
 475  *
 476  * It prevents windows driver from sending zero lenght packet (ZLP) after
 477  * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
 478  */
 479 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
 480         .bLength =              sizeof(thor_downloader_cdc_av),
 481         .bDescriptorType =      0x24,
 482         .bDescriptorSubType =   0x80,
 483         .DAUType =              0x0002,
 484         .DAULength =            0x0001,
 485         .DAUValue =             0x00,
 486 };
 487
 488 static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
 489         (struct usb_descriptor_header *)&thor_iad_descriptor,
 490
 491         (struct usb_descriptor_header *)&thor_downloader_intf_int,
 492         (struct usb_descriptor_header *)&thor_downloader_cdc_header,
 493         (struct usb_descriptor_header *)&thor_downloader_cdc_call,
 494         (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
 495         (struct usb_descriptor_header *)&thor_downloader_cdc_union,
 496         (struct usb_descriptor_header *)&hs_int_desc,
 497
 498         (struct usb_descriptor_header *)&thor_downloader_intf_data,
 499         (struct usb_descriptor_header *)&thor_downloader_cdc_av,
 500         (struct usb_descriptor_header *)&hs_in_desc,
 501         (struct usb_descriptor_header *)&hs_out_desc,
 502         NULL,
 503 };
 504
 505 /*-------------------------------------------------------------------------*/
 506 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
 507 {
 508         struct usb_request *req;
 509
 510         req = usb_ep_alloc_request(ep, 0);
 511         if (!req)
 512                 return req;
 513
 514         req->length = length;
 515         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
 516         if (!req->buf) {
 517                 usb_ep_free_request(ep, req);
 518                 req = NULL;
 519         }
 520
 521         return req;
 522 }
 523
 524 static int thor_rx_data(void)
 525 {
 526         struct thor_dev *dev = thor_func->dev;
 527         int data_to_rx, tmp, status;
 528
 529         data_to_rx = dev->out_req->length;
 530         tmp = data_to_rx;
 531         do {
 532                 dev->out_req->length = data_to_rx;
 533                 debug("dev->out_req->length:%d dev->rxdata:%d\n",
 534                       dev->out_req->length, dev->rxdata);
 535
 536                 status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
 537                 if (status) {
 538                         error("kill %s:  resubmit %d bytes --> %d",
 539                               dev->out_ep->name, dev->out_req->length, status);
 540                         usb_ep_set_halt(dev->out_ep);
 541                         return -EAGAIN;
 542                 }
 543
 544                 while (!dev->rxdata) {
 545                         usb_gadget_handle_interrupts();
 546                         if (ctrlc())
 547                                 return -1;
 548                 }
 549                 dev->rxdata = 0;
 550                 data_to_rx -= dev->out_req->actual;
 551         } while (data_to_rx);
 552
 553         return tmp;
 554 }
 555
 556 static void thor_tx_data(unsigned char *data, int len)
 557 {
 558         struct thor_dev *dev = thor_func->dev;
 559         unsigned char *ptr = dev->in_req->buf;
 560         int status;
 561
 562         memset(ptr, 0, len);
 563         memcpy(ptr, data, len);
 564
 565         dev->in_req->length = len;
 566
 567         debug("%s: dev->in_req->length:%d to_cpy:%d\n", __func__,
 568               dev->in_req->length, sizeof(data));
 569
 570         status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
 571         if (status) {
 572                 error("kill %s:  resubmit %d bytes --> %d",
 573                       dev->in_ep->name, dev->in_req->length, status);
 574                 usb_ep_set_halt(dev->in_ep);
 575         }
 576
 577         /* Wait until tx interrupt received */
 578         while (!dev->txdata)
 579                 usb_gadget_handle_interrupts();
 580
 581         dev->txdata = 0;
 582 }
 583
 584 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
 585 {
 586         struct thor_dev *dev = thor_func->dev;
 587         int status = req->status;
 588
 589         debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
 590         switch (status) {
 591         case 0:
 592                 if (ep == dev->out_ep)
 593                         dev->rxdata = 1;
 594                 else
 595                         dev->txdata = 1;
 596
 597                 break;
 598
 599         /* this endpoint is normally active while we're configured */
 600         case -ECONNABORTED:             /* hardware forced ep reset */
 601         case -ECONNRESET:               /* request dequeued */
 602         case -ESHUTDOWN:                /* disconnect from host */
 603         case -EREMOTEIO:                /* short read */
 604         case -EOVERFLOW:
 605                 error("ERROR:%d", status);
 606                 break;
 607         }
 608
 609         debug("%s complete --> %d, %d/%d\n", ep->name,
 610               status, req->actual, req->length);
 611 }
 612
 613 static struct usb_request *thor_start_ep(struct usb_ep *ep)
 614 {
 615         struct usb_request *req;
 616
 617         req = alloc_ep_req(ep, ep->maxpacket);
 618         debug("%s: ep:%p req:%p\n", __func__, ep, req);
 619
 620         if (!req)
 621                 return NULL;
 622
 623         memset(req->buf, 0, req->length);
 624         req->complete = thor_rx_tx_complete;
 625
 626         memset(req->buf, 0x55, req->length);
 627
 628         return req;
 629 }
 630
 631 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
 632 {
 633         if (req->status || req->actual != req->length)
 634                 debug("setup complete --> %d, %d/%d\n",
 635                       req->status, req->actual, req->length);
 636 }
 637
 638 static int
 639 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 640 {
 641         struct thor_dev *dev = thor_func->dev;
 642         struct usb_request *req = dev->req;
 643         struct usb_gadget *gadget = dev->gadget;
 644         int value = 0;
 645
 646         u16 len = le16_to_cpu(ctrl->wLength);
 647
 648         debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
 649               ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
 650               ctrl->wLength);
 651
 652         switch (ctrl->bRequest) {
 653         case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 654                 value = 0;
 655                 break;
 656         case USB_CDC_REQ_SET_LINE_CODING:
 657                 value = len;
 658                 /* Line Coding set done = configuration done */
 659                 thor_func->dev->configuration_done = 1;
 660                 break;
 661
 662         default:
 663                 error("thor_setup: unknown request: %d", ctrl->bRequest);
 664         }
 665
 666         if (value >= 0) {
 667                 req->length = value;
 668                 req->zero = value < len;
 669                 value = usb_ep_queue(gadget->ep0, req, 0);
 670                 if (value < 0) {
 671                         debug("%s: ep_queue: %d\n", __func__, value);
 672                         req->status = 0;
 673                 }
 674         }
 675
 676         return value;
 677 }
 678
 679 /* Specific to the THOR protocol */
 680 static void thor_set_dma(void *addr, int len)
 681 {
 682         struct thor_dev *dev = thor_func->dev;
 683
 684         debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
 685         debug("addr:%p, len:%d\n", addr, len);
 686
 687         dev->out_req->buf = addr;
 688         dev->out_req->length = len;
 689 }
 690
 691 int thor_init(void)
 692 {
 693         struct thor_dev *dev = thor_func->dev;
 694
 695         /* Wait for a device enumeration and configuration settings */
 696         debug("THOR enumeration/configuration setting....\n");
 697         while (!dev->configuration_done)
 698                 usb_gadget_handle_interrupts();
 699
 700         thor_set_dma(thor_rx_data_buf, strlen("THOR"));
 701         /* detect the download request from Host PC */
 702         if (thor_rx_data() < 0) {
 703                 printf("%s: Data not received!\n", __func__);
 704                 return -1;
 705         }
 706
 707         if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) {
 708                 puts("Download request from the Host PC\n");
 709                 udelay(30 * 1000); /* 30 ms */
 710
 711                 strcpy((char *)thor_tx_data_buf, "ROHT");
 712                 thor_tx_data(thor_tx_data_buf, strlen("ROHT"));
 713         } else {
 714                 puts("Wrong reply information\n");
 715                 return -1;
 716         }
 717
 718         return 0;
 719 }
 720
 721 int thor_handle(void)
 722 {
 723         int ret;
 724
 725         /* receive the data from Host PC */
 726         while (1) {
 727                 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
 728                 ret = thor_rx_data();
 729
 730                 if (ret > 0) {
 731                         ret = process_data();
 732                         if (ret < 0)
 733                                 return ret;
 734                 } else {
 735                         printf("%s: No data received!\n", __func__);
 736                         break;
 737                 }
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f)
 744 {
 745         struct usb_gadget *gadget = c->cdev->gadget;
 746         struct f_thor *f_thor = func_to_thor(f);
 747         struct thor_dev *dev;
 748         struct usb_ep *ep;
 749         int status;
 750
 751         thor_func = f_thor;
 752         dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev));
 753         if (!dev)
 754                 return -ENOMEM;
 755
 756         memset(dev, 0, sizeof(*dev));
 757         dev->gadget = gadget;
 758         f_thor->dev = dev;
 759
 760         debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n",
 761               __func__, c, f);
 762         debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev);
 763
 764         /* EP0  */
 765         /* preallocate control response and buffer */
 766         dev->req = usb_ep_alloc_request(gadget->ep0, 0);
 767         if (!dev->req) {
 768                 status = -ENOMEM;
 769                 goto fail;
 770         }
 771         dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
 772                                  gadget->ep0->maxpacket);
 773         if (!dev->req->buf) {
 774                 status = -ENOMEM;
 775                 goto fail;
 776         }
 777
 778         dev->req->complete = thor_setup_complete;
 779
 780         /* DYNAMIC interface numbers assignments */
 781         status = usb_interface_id(c, f);
 782
 783         if (status < 0)
 784                 goto fail;
 785
 786         thor_downloader_intf_int.bInterfaceNumber = status;
 787         thor_downloader_cdc_union.bMasterInterface0 = status;
 788
 789         status = usb_interface_id(c, f);
 790
 791         if (status < 0)
 792                 goto fail;
 793
 794         thor_downloader_intf_data.bInterfaceNumber = status;
 795         thor_downloader_cdc_union.bSlaveInterface0 = status;
 796
 797         /* allocate instance-specific endpoints */
 798         ep = usb_ep_autoconfig(gadget, &fs_in_desc);
 799         if (!ep) {
 800                 status = -ENODEV;
 801                 goto fail;
 802         }
 803
 804         if (gadget_is_dualspeed(gadget)) {
 805                 hs_in_desc.bEndpointAddress =
 806                                 fs_in_desc.bEndpointAddress;
 807         }
 808
 809         dev->in_ep = ep; /* Store IN EP for enabling @ setup */
 810
 811         ep = usb_ep_autoconfig(gadget, &fs_out_desc);
 812         if (!ep) {
 813                 status = -ENODEV;
 814                 goto fail;
 815         }
 816
 817         if (gadget_is_dualspeed(gadget))
 818                 hs_out_desc.bEndpointAddress =
 819                                 fs_out_desc.bEndpointAddress;
 820
 821         dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
 822
 823         ep = usb_ep_autoconfig(gadget, &fs_int_desc);
 824         if (!ep) {
 825                 status = -ENODEV;
 826                 goto fail;
 827         }
 828
 829         dev->int_ep = ep;
 830
 831         if (gadget_is_dualspeed(gadget)) {
 832                 hs_int_desc.bEndpointAddress =
 833                                 fs_int_desc.bEndpointAddress;
 834
 835                 f->hs_descriptors = (struct usb_descriptor_header **)
 836                         &hs_thor_downloader_function;
 837
 838                 if (!f->hs_descriptors)
 839                         goto fail;
 840         }
 841
 842         debug("%s: out_ep:%p out_req:%p\n", __func__,
 843               dev->out_ep, dev->out_req);
 844
 845         return 0;
 846
 847  fail:
 848         free(dev);
 849         return status;
 850 }
 851
 852 static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
 853 {
 854         free(req->buf);
 855         usb_ep_free_request(ep, req);
 856 }
 857
 858 static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
 859 {
 860         struct f_thor *f_thor = func_to_thor(f);
 861         struct thor_dev *dev = f_thor->dev;
 862
 863         free(dev);
 864         memset(thor_func, 0, sizeof(*thor_func));
 865         thor_func = NULL;
 866 }
 867
 868 static void thor_func_disable(struct usb_function *f)
 869 {
 870         struct f_thor *f_thor = func_to_thor(f);
 871         struct thor_dev *dev = f_thor->dev;
 872
 873         debug("%s:\n", __func__);
 874
 875         /* Avoid freeing memory when ep is still claimed */
 876         if (dev->in_ep->driver_data) {
 877                 free_ep_req(dev->in_ep, dev->in_req);
 878                 usb_ep_disable(dev->in_ep);
 879                 dev->in_ep->driver_data = NULL;
 880         }
 881
 882         if (dev->out_ep->driver_data) {
 883                 dev->out_req->buf = NULL;
 884                 usb_ep_free_request(dev->out_ep, dev->out_req);
 885                 usb_ep_disable(dev->out_ep);
 886                 dev->out_ep->driver_data = NULL;
 887         }
 888
 889         if (dev->int_ep->driver_data) {
 890                 usb_ep_disable(dev->int_ep);
 891                 dev->int_ep->driver_data = NULL;
 892         }
 893 }
 894
 895 static int thor_eps_setup(struct usb_function *f)
 896 {
 897         struct usb_composite_dev *cdev = f->config->cdev;
 898         struct usb_gadget *gadget = cdev->gadget;
 899         struct thor_dev *dev = thor_func->dev;
 900         struct usb_endpoint_descriptor *d;
 901         struct usb_request *req;
 902         struct usb_ep *ep;
 903         int result;
 904
 905         ep = dev->in_ep;
 906         d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
 907         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 908
 909         result = usb_ep_enable(ep, d);
 910         if (result)
 911                 goto exit;
 912
 913         ep->driver_data = cdev; /* claim */
 914         req = thor_start_ep(ep);
 915         if (!req) {
 916                 usb_ep_disable(ep);
 917                 result = -EIO;
 918                 goto exit;
 919         }
 920
 921         dev->in_req = req;
 922         ep = dev->out_ep;
 923         d = ep_desc(gadget, &hs_out_desc, &fs_out_desc);
 924         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 925
 926         result = usb_ep_enable(ep, d);
 927         if (result)
 928                 goto exit;
 929
 930         ep->driver_data = cdev; /* claim */
 931         req = thor_start_ep(ep);
 932         if (!req) {
 933                 usb_ep_disable(ep);
 934                 result = -EIO;
 935                 goto exit;
 936         }
 937
 938         dev->out_req = req;
 939         /* ACM control EP */
 940         ep = dev->int_ep;
 941         ep->driver_data = cdev; /* claim */
 942
 943  exit:
 944         return result;
 945 }
 946
 947 static int thor_func_set_alt(struct usb_function *f,
 948                              unsigned intf, unsigned alt)
 949 {
 950         struct thor_dev *dev = thor_func->dev;
 951         int result;
 952
 953         debug("%s: func: %s intf: %d alt: %d\n",
 954               __func__, f->name, intf, alt);
 955
 956         switch (intf) {
 957         case 0:
 958                 debug("ACM INTR interface\n");
 959                 break;
 960         case 1:
 961                 debug("Communication Data interface\n");
 962                 result = thor_eps_setup(f);
 963                 if (result)
 964                         error("%s: EPs setup failed!", __func__);
 965                 dev->configuration_done = 1;
 966                 break;
 967         }
 968
 969         return 0;
 970 }
 971
 972 static int thor_func_init(struct usb_configuration *c)
 973 {
 974         struct f_thor *f_thor;
 975         int status;
 976
 977         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 978
 979         f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
 980         if (!f_thor)
 981                 return -ENOMEM;
 982
 983         memset(f_thor, 0, sizeof(*f_thor));
 984
 985         f_thor->usb_function.name = "f_thor";
 986         f_thor->usb_function.bind = thor_func_bind;
 987         f_thor->usb_function.unbind = thor_unbind;
 988         f_thor->usb_function.setup = thor_func_setup;
 989         f_thor->usb_function.set_alt = thor_func_set_alt;
 990         f_thor->usb_function.disable = thor_func_disable;
 991
 992         status = usb_add_function(c, &f_thor->usb_function);
 993         if (status)
 994                 free(f_thor);
 995
 996         return status;
 997 }
 998
 999 int thor_add(struct usb_configuration *c)
1000 {
1001         debug("%s:\n", __func__);
1002         return thor_func_init(c);
1003 }