git.sur5r.net Git - u-boot/blob - 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 <console.h>
  21 #include <malloc.h>
  22 #include <memalign.h>
  23 #include <version.h>
  24 #include <linux/usb/ch9.h>
  25 #include <linux/usb/gadget.h>
  26 #include <linux/usb/composite.h>
  27 #include <linux/usb/cdc.h>
  28 #include <g_dnl.h>
  29 #include <dfu.h>
  30
  31 #include "f_thor.h"
  32
  33 static void thor_tx_data(unsigned char *data, int len);
  34 static void thor_set_dma(void *addr, int len);
  35 static int thor_rx_data(void);
  36
  37 static struct f_thor *thor_func;
  38 static inline struct f_thor *func_to_thor(struct usb_function *f)
  39 {
  40         return container_of(f, struct f_thor, usb_function);
  41 }
  42
  43 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_tx_data_buf,
  44                           sizeof(struct rsp_box));
  45 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_rx_data_buf,
  46                           sizeof(struct rqt_box));
  47
  48 /* ********************************************************** */
  49 /*         THOR protocol - transmission handling              */
  50 /* ********************************************************** */
  51 DEFINE_CACHE_ALIGN_BUFFER(char, f_name, F_NAME_BUF_SIZE);
  52 static unsigned long long int thor_file_size;
  53 static int alt_setting_num;
  54
  55 static void send_rsp(const struct rsp_box *rsp)
  56 {
  57         memcpy(thor_tx_data_buf, rsp, sizeof(struct rsp_box));
  58         thor_tx_data(thor_tx_data_buf, sizeof(struct rsp_box));
  59
  60         debug("-RSP: %d, %d\n", rsp->rsp, rsp->rsp_data);
  61 }
  62
  63 static void send_data_rsp(s32 ack, s32 count)
  64 {
  65         ALLOC_CACHE_ALIGN_BUFFER(struct data_rsp_box, rsp,
  66                                  sizeof(struct data_rsp_box));
  67
  68         rsp->ack = ack;
  69         rsp->count = count;
  70
  71         memcpy(thor_tx_data_buf, rsp, sizeof(struct data_rsp_box));
  72         thor_tx_data(thor_tx_data_buf, sizeof(struct data_rsp_box));
  73
  74         debug("-DATA RSP: %d, %d\n", ack, count);
  75 }
  76
  77 static int process_rqt_info(const struct rqt_box *rqt)
  78 {
  79         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
  80         memset(rsp, 0, sizeof(struct rsp_box));
  81
  82         rsp->rsp = rqt->rqt;
  83         rsp->rsp_data = rqt->rqt_data;
  84
  85         switch (rqt->rqt_data) {
  86         case RQT_INFO_VER_PROTOCOL:
  87                 rsp->int_data[0] = VER_PROTOCOL_MAJOR;
  88                 rsp->int_data[1] = VER_PROTOCOL_MINOR;
  89                 break;
  90         case RQT_INIT_VER_HW:
  91                 snprintf(rsp->str_data[0], sizeof(rsp->str_data[0]),
  92                          "%x", checkboard());
  93                 break;
  94         case RQT_INIT_VER_BOOT:
  95                 sprintf(rsp->str_data[0], "%s", U_BOOT_VERSION);
  96                 break;
  97         case RQT_INIT_VER_KERNEL:
  98                 sprintf(rsp->str_data[0], "%s", "k unknown");
  99                 break;
 100         case RQT_INIT_VER_PLATFORM:
 101                 sprintf(rsp->str_data[0], "%s", "p unknown");
 102                 break;
 103         case RQT_INIT_VER_CSC:
 104                 sprintf(rsp->str_data[0], "%s", "c unknown");
 105                 break;
 106         default:
 107                 return -EINVAL;
 108         }
 109
 110         send_rsp(rsp);
 111         return true;
 112 }
 113
 114 static int process_rqt_cmd(const struct rqt_box *rqt)
 115 {
 116         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
 117         memset(rsp, 0, sizeof(struct rsp_box));
 118
 119         rsp->rsp = rqt->rqt;
 120         rsp->rsp_data = rqt->rqt_data;
 121
 122         switch (rqt->rqt_data) {
 123         case RQT_CMD_REBOOT:
 124                 debug("TARGET RESET\n");
 125                 send_rsp(rsp);
 126                 g_dnl_unregister();
 127                 dfu_free_entities();
 128 #ifdef CONFIG_THOR_RESET_OFF
 129                 return RESET_DONE;
 130 #endif
 131                 run_command("reset", 0);
 132                 break;
 133         case RQT_CMD_POWEROFF:
 134         case RQT_CMD_EFSCLEAR:
 135                 send_rsp(rsp);
 136         default:
 137                 printf("Command not supported -> cmd: %d\n", rqt->rqt_data);
 138                 return -EINVAL;
 139         }
 140
 141         return true;
 142 }
 143
 144 static long long int download_head(unsigned long long total,
 145                                    unsigned int packet_size,
 146                                    long long int *left,
 147                                    int *cnt)
 148 {
 149         long long int rcv_cnt = 0, left_to_rcv, ret_rcv;
 150         struct dfu_entity *dfu_entity = dfu_get_entity(alt_setting_num);
 151         void *transfer_buffer = dfu_get_buf(dfu_entity);
 152         void *buf = transfer_buffer;
 153         int usb_pkt_cnt = 0, ret;
 154
 155         /*
 156          * Files smaller than THOR_STORE_UNIT_SIZE (now 32 MiB) are stored on
 157          * the medium.
 158          * The packet response is sent on the purpose after successful data
 159          * chunk write. There is a room for improvement when asynchronous write
 160          * is performed.
 161          */
 162         while (total - rcv_cnt >= packet_size) {
 163                 thor_set_dma(buf, packet_size);
 164                 buf += packet_size;
 165                 ret_rcv = thor_rx_data();
 166                 if (ret_rcv < 0)
 167                         return ret_rcv;
 168                 rcv_cnt += ret_rcv;
 169                 debug("%d: RCV data count: %llu cnt: %d\n", usb_pkt_cnt,
 170                       rcv_cnt, *cnt);
 171
 172                 if ((rcv_cnt % THOR_STORE_UNIT_SIZE) == 0) {
 173                         ret = dfu_write(dfu_get_entity(alt_setting_num),
 174                                         transfer_buffer, THOR_STORE_UNIT_SIZE,
 175                                         (*cnt)++);
 176                         if (ret) {
 177                                 pr_err("DFU write failed [%d] cnt: %d",
 178                                       ret, *cnt);
 179                                 return ret;
 180                         }
 181                         buf = transfer_buffer;
 182                 }
 183                 send_data_rsp(0, ++usb_pkt_cnt);
 184         }
 185
 186         /* Calculate the amount of data to arrive from PC (in bytes) */
 187         left_to_rcv = total - rcv_cnt;
 188
 189         /*
 190          * Calculate number of data already received. but not yet stored
 191          * on the medium (they are smaller than THOR_STORE_UNIT_SIZE)
 192          */
 193         *left = left_to_rcv + buf - transfer_buffer;
 194         debug("%s: left: %llu left_to_rcv: %llu buf: 0x%p\n", __func__,
 195               *left, left_to_rcv, buf);
 196
 197         if (left_to_rcv) {
 198                 thor_set_dma(buf, packet_size);
 199                 ret_rcv = thor_rx_data();
 200                 if (ret_rcv < 0)
 201                         return ret_rcv;
 202                 rcv_cnt += ret_rcv;
 203                 send_data_rsp(0, ++usb_pkt_cnt);
 204         }
 205
 206         debug("%s: %llu total: %llu cnt: %d\n", __func__, rcv_cnt, total, *cnt);
 207
 208         return rcv_cnt;
 209 }
 210
 211 static int download_tail(long long int left, int cnt)
 212 {
 213         struct dfu_entity *dfu_entity;
 214         void *transfer_buffer;
 215         int ret;
 216
 217         debug("%s: left: %llu cnt: %d\n", __func__, left, cnt);
 218
 219         dfu_entity = dfu_get_entity(alt_setting_num);
 220         if (!dfu_entity) {
 221                 pr_err("Alt setting: %d entity not found!\n", alt_setting_num);
 222                 return -ENOENT;
 223         }
 224
 225         transfer_buffer = dfu_get_buf(dfu_entity);
 226         if (!transfer_buffer) {
 227                 pr_err("Transfer buffer not allocated!");
 228                 return -ENXIO;
 229         }
 230
 231         if (left) {
 232                 ret = dfu_write(dfu_entity, transfer_buffer, left, cnt++);
 233                 if (ret) {
 234                         pr_err("DFU write failed [%d]: left: %llu", ret, left);
 235                         return ret;
 236                 }
 237         }
 238
 239         /*
 240          * To store last "packet" or write file from buffer to filesystem
 241          * DFU storage backend requires dfu_flush
 242          *
 243          * This also frees memory malloc'ed by dfu_get_buf(), so no explicit
 244          * need fo call dfu_free_buf() is needed.
 245          */
 246         ret = dfu_flush(dfu_entity, transfer_buffer, 0, cnt);
 247         if (ret)
 248                 pr_err("DFU flush failed!");
 249
 250         return ret;
 251 }
 252
 253 static long long int process_rqt_download(const struct rqt_box *rqt)
 254 {
 255         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
 256         static long long int left, ret_head;
 257         int file_type, ret = 0;
 258         static int cnt;
 259
 260         memset(rsp, 0, sizeof(struct rsp_box));
 261         rsp->rsp = rqt->rqt;
 262         rsp->rsp_data = rqt->rqt_data;
 263
 264         switch (rqt->rqt_data) {
 265         case RQT_DL_INIT:
 266                 thor_file_size = rqt->int_data[0];
 267                 debug("INIT: total %d bytes\n", rqt->int_data[0]);
 268                 break;
 269         case RQT_DL_FILE_INFO:
 270                 file_type = rqt->int_data[0];
 271                 if (file_type == FILE_TYPE_PIT) {
 272                         puts("PIT table file - not supported\n");
 273                         rsp->ack = -ENOTSUPP;
 274                         ret = rsp->ack;
 275                         break;
 276                 }
 277
 278                 thor_file_size = rqt->int_data[1];
 279                 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE);
 280
 281                 debug("INFO: name(%s, %d), size(%llu), type(%d)\n",
 282                       f_name, 0, thor_file_size, file_type);
 283
 284                 rsp->int_data[0] = THOR_PACKET_SIZE;
 285
 286                 alt_setting_num = dfu_get_alt(f_name);
 287                 if (alt_setting_num < 0) {
 288                         pr_err("Alt setting [%d] to write not found!",
 289                               alt_setting_num);
 290                         rsp->ack = -ENODEV;
 291                         ret = rsp->ack;
 292                 }
 293                 break;
 294         case RQT_DL_FILE_START:
 295                 send_rsp(rsp);
 296                 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE,
 297                                          &left, &cnt);
 298                 if (ret_head < 0) {
 299                         left = 0;
 300                         cnt = 0;
 301                 }
 302                 return ret_head;
 303         case RQT_DL_FILE_END:
 304                 debug("DL FILE_END\n");
 305                 rsp->ack = download_tail(left, cnt);
 306                 ret = rsp->ack;
 307                 left = 0;
 308                 cnt = 0;
 309                 break;
 310         case RQT_DL_EXIT:
 311                 debug("DL EXIT\n");
 312                 break;
 313         default:
 314                 pr_err("Operation not supported: %d", rqt->rqt_data);
 315                 ret = -ENOTSUPP;
 316         }
 317
 318         send_rsp(rsp);
 319         return ret;
 320 }
 321
 322 static int process_data(void)
 323 {
 324         ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box));
 325         int ret = -EINVAL;
 326
 327         memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
 328
 329         debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
 330
 331         switch (rqt->rqt) {
 332         case RQT_INFO:
 333                 ret = process_rqt_info(rqt);
 334                 break;
 335         case RQT_CMD:
 336                 ret = process_rqt_cmd(rqt);
 337                 break;
 338         case RQT_DL:
 339                 ret = (int) process_rqt_download(rqt);
 340                 break;
 341         case RQT_UL:
 342                 puts("RQT: UPLOAD not supported!\n");
 343                 break;
 344         default:
 345                 pr_err("unknown request (%d)", rqt->rqt);
 346         }
 347
 348         return ret;
 349 }
 350
 351 /* ********************************************************** */
 352 /*         THOR USB Function                                  */
 353 /* ********************************************************** */
 354
 355 static inline struct usb_endpoint_descriptor *
 356 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
 357         struct usb_endpoint_descriptor *fs)
 358 {
 359         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 360                 return hs;
 361         return fs;
 362 }
 363
 364 static struct usb_interface_descriptor thor_downloader_intf_data = {
 365         .bLength =              sizeof(thor_downloader_intf_data),
 366         .bDescriptorType =      USB_DT_INTERFACE,
 367
 368         .bNumEndpoints =        2,
 369         .bInterfaceClass =      USB_CLASS_CDC_DATA,
 370 };
 371
 372 static struct usb_endpoint_descriptor fs_in_desc = {
 373         .bLength =              USB_DT_ENDPOINT_SIZE,
 374         .bDescriptorType =      USB_DT_ENDPOINT,
 375
 376         .bEndpointAddress =     USB_DIR_IN,
 377         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 378 };
 379
 380 static struct usb_endpoint_descriptor fs_out_desc = {
 381         .bLength =              USB_DT_ENDPOINT_SIZE,
 382         .bDescriptorType =      USB_DT_ENDPOINT,
 383
 384         .bEndpointAddress =     USB_DIR_OUT,
 385         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 386 };
 387
 388 /* CDC configuration */
 389 static struct usb_interface_descriptor thor_downloader_intf_int = {
 390         .bLength =              sizeof(thor_downloader_intf_int),
 391         .bDescriptorType =      USB_DT_INTERFACE,
 392
 393         .bNumEndpoints =        1,
 394         .bInterfaceClass =      USB_CLASS_COMM,
 395          /* 0x02 Abstract Line Control Model */
 396         .bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
 397         /* 0x01 Common AT commands */
 398         .bInterfaceProtocol =   USB_CDC_ACM_PROTO_AT_V25TER,
 399 };
 400
 401 static struct usb_cdc_header_desc thor_downloader_cdc_header = {
 402         .bLength         =    sizeof(thor_downloader_cdc_header),
 403         .bDescriptorType =    0x24, /* CS_INTERFACE */
 404         .bDescriptorSubType = 0x00,
 405         .bcdCDC =             0x0110,
 406 };
 407
 408 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
 409         .bLength         =    sizeof(thor_downloader_cdc_call),
 410         .bDescriptorType =    0x24, /* CS_INTERFACE */
 411         .bDescriptorSubType = 0x01,
 412         .bmCapabilities =     0x00,
 413         .bDataInterface =     0x01,
 414 };
 415
 416 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
 417         .bLength         =    sizeof(thor_downloader_cdc_abstract),
 418         .bDescriptorType =    0x24, /* CS_INTERFACE */
 419         .bDescriptorSubType = 0x02,
 420         .bmCapabilities =     0x00,
 421 };
 422
 423 static struct usb_cdc_union_desc thor_downloader_cdc_union = {
 424         .bLength         =     sizeof(thor_downloader_cdc_union),
 425         .bDescriptorType =     0x24, /* CS_INTERFACE */
 426         .bDescriptorSubType =  USB_CDC_UNION_TYPE,
 427 };
 428
 429 static struct usb_endpoint_descriptor fs_int_desc = {
 430         .bLength = USB_DT_ENDPOINT_SIZE,
 431         .bDescriptorType = USB_DT_ENDPOINT,
 432
 433         .bEndpointAddress = 3 | USB_DIR_IN,
 434         .bmAttributes = USB_ENDPOINT_XFER_INT,
 435         .wMaxPacketSize = __constant_cpu_to_le16(16),
 436
 437         .bInterval = 0x9,
 438 };
 439
 440 static struct usb_interface_assoc_descriptor
 441 thor_iad_descriptor = {
 442         .bLength =              sizeof(thor_iad_descriptor),
 443         .bDescriptorType =      USB_DT_INTERFACE_ASSOCIATION,
 444
 445         .bFirstInterface =      0,
 446         .bInterfaceCount =      2,      /* control + data */
 447         .bFunctionClass =       USB_CLASS_COMM,
 448         .bFunctionSubClass =    USB_CDC_SUBCLASS_ACM,
 449         .bFunctionProtocol =    USB_CDC_PROTO_NONE,
 450 };
 451
 452 static struct usb_endpoint_descriptor hs_in_desc = {
 453         .bLength =              USB_DT_ENDPOINT_SIZE,
 454         .bDescriptorType =      USB_DT_ENDPOINT,
 455
 456         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 457         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 458 };
 459
 460 static struct usb_endpoint_descriptor hs_out_desc = {
 461         .bLength =              USB_DT_ENDPOINT_SIZE,
 462         .bDescriptorType =      USB_DT_ENDPOINT,
 463
 464         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 465         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 466 };
 467
 468 static struct usb_endpoint_descriptor hs_int_desc = {
 469         .bLength = USB_DT_ENDPOINT_SIZE,
 470         .bDescriptorType = USB_DT_ENDPOINT,
 471
 472         .bmAttributes = USB_ENDPOINT_XFER_INT,
 473         .wMaxPacketSize = __constant_cpu_to_le16(16),
 474
 475         .bInterval = 0x9,
 476 };
 477
 478 /*
 479  * This attribute vendor descriptor is necessary for correct operation with
 480  * Windows version of THOR download program
 481  *
 482  * It prevents windows driver from sending zero lenght packet (ZLP) after
 483  * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
 484  */
 485 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
 486         .bLength =              sizeof(thor_downloader_cdc_av),
 487         .bDescriptorType =      0x24,
 488         .bDescriptorSubType =   0x80,
 489         .DAUType =              0x0002,
 490         .DAULength =            0x0001,
 491         .DAUValue =             0x00,
 492 };
 493
 494 static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
 495         (struct usb_descriptor_header *)&thor_iad_descriptor,
 496
 497         (struct usb_descriptor_header *)&thor_downloader_intf_int,
 498         (struct usb_descriptor_header *)&thor_downloader_cdc_header,
 499         (struct usb_descriptor_header *)&thor_downloader_cdc_call,
 500         (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
 501         (struct usb_descriptor_header *)&thor_downloader_cdc_union,
 502         (struct usb_descriptor_header *)&hs_int_desc,
 503
 504         (struct usb_descriptor_header *)&thor_downloader_intf_data,
 505         (struct usb_descriptor_header *)&thor_downloader_cdc_av,
 506         (struct usb_descriptor_header *)&hs_in_desc,
 507         (struct usb_descriptor_header *)&hs_out_desc,
 508         NULL,
 509 };
 510
 511 /*-------------------------------------------------------------------------*/
 512 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
 513 {
 514         struct usb_request *req;
 515
 516         req = usb_ep_alloc_request(ep, 0);
 517         if (!req)
 518                 return req;
 519
 520         req->length = length;
 521         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
 522         if (!req->buf) {
 523                 usb_ep_free_request(ep, req);
 524                 req = NULL;
 525         }
 526
 527         return req;
 528 }
 529
 530 static int thor_rx_data(void)
 531 {
 532         struct thor_dev *dev = thor_func->dev;
 533         int data_to_rx, tmp, status;
 534
 535         data_to_rx = dev->out_req->length;
 536         tmp = data_to_rx;
 537         do {
 538                 dev->out_req->length = data_to_rx;
 539                 debug("dev->out_req->length:%d dev->rxdata:%d\n",
 540                       dev->out_req->length, dev->rxdata);
 541
 542                 status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
 543                 if (status) {
 544                         pr_err("kill %s:  resubmit %d bytes --> %d",
 545                               dev->out_ep->name, dev->out_req->length, status);
 546                         usb_ep_set_halt(dev->out_ep);
 547                         return -EAGAIN;
 548                 }
 549
 550                 while (!dev->rxdata) {
 551                         usb_gadget_handle_interrupts(0);
 552                         if (ctrlc())
 553                                 return -1;
 554                 }
 555                 dev->rxdata = 0;
 556                 data_to_rx -= dev->out_req->actual;
 557         } while (data_to_rx);
 558
 559         return tmp;
 560 }
 561
 562 static void thor_tx_data(unsigned char *data, int len)
 563 {
 564         struct thor_dev *dev = thor_func->dev;
 565         unsigned char *ptr = dev->in_req->buf;
 566         int status;
 567
 568         memset(ptr, 0, len);
 569         memcpy(ptr, data, len);
 570
 571         dev->in_req->length = len;
 572
 573         debug("%s: dev->in_req->length:%d to_cpy:%zd\n", __func__,
 574               dev->in_req->length, sizeof(data));
 575
 576         status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
 577         if (status) {
 578                 pr_err("kill %s:  resubmit %d bytes --> %d",
 579                       dev->in_ep->name, dev->in_req->length, status);
 580                 usb_ep_set_halt(dev->in_ep);
 581         }
 582
 583         /* Wait until tx interrupt received */
 584         while (!dev->txdata)
 585                 usb_gadget_handle_interrupts(0);
 586
 587         dev->txdata = 0;
 588 }
 589
 590 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
 591 {
 592         struct thor_dev *dev = thor_func->dev;
 593         int status = req->status;
 594
 595         debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
 596         switch (status) {
 597         case 0:
 598                 if (ep == dev->out_ep)
 599                         dev->rxdata = 1;
 600                 else
 601                         dev->txdata = 1;
 602
 603                 break;
 604
 605         /* this endpoint is normally active while we're configured */
 606         case -ECONNABORTED:             /* hardware forced ep reset */
 607         case -ECONNRESET:               /* request dequeued */
 608         case -ESHUTDOWN:                /* disconnect from host */
 609         case -EREMOTEIO:                /* short read */
 610         case -EOVERFLOW:
 611                 pr_err("ERROR:%d", status);
 612                 break;
 613         }
 614
 615         debug("%s complete --> %d, %d/%d\n", ep->name,
 616               status, req->actual, req->length);
 617 }
 618
 619 static struct usb_request *thor_start_ep(struct usb_ep *ep)
 620 {
 621         struct usb_request *req;
 622
 623         req = alloc_ep_req(ep, THOR_PACKET_SIZE);
 624         debug("%s: ep:%p req:%p\n", __func__, ep, req);
 625
 626         if (!req)
 627                 return NULL;
 628
 629         memset(req->buf, 0, req->length);
 630         req->complete = thor_rx_tx_complete;
 631
 632         return req;
 633 }
 634
 635 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
 636 {
 637         if (req->status || req->actual != req->length)
 638                 debug("setup complete --> %d, %d/%d\n",
 639                       req->status, req->actual, req->length);
 640 }
 641
 642 static int
 643 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 644 {
 645         struct thor_dev *dev = thor_func->dev;
 646         struct usb_request *req = dev->req;
 647         struct usb_gadget *gadget = dev->gadget;
 648         int value = 0;
 649
 650         u16 len = le16_to_cpu(ctrl->wLength);
 651
 652         debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
 653               ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
 654               ctrl->wLength);
 655
 656         switch (ctrl->bRequest) {
 657         case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 658                 value = 0;
 659                 break;
 660         case USB_CDC_REQ_SET_LINE_CODING:
 661                 value = len;
 662                 /* Line Coding set done = configuration done */
 663                 thor_func->dev->configuration_done = 1;
 664                 break;
 665
 666         default:
 667                 pr_err("thor_setup: unknown request: %d", ctrl->bRequest);
 668         }
 669
 670         if (value >= 0) {
 671                 req->length = value;
 672                 req->zero = value < len;
 673                 value = usb_ep_queue(gadget->ep0, req, 0);
 674                 if (value < 0) {
 675                         debug("%s: ep_queue: %d\n", __func__, value);
 676                         req->status = 0;
 677                 }
 678         }
 679
 680         return value;
 681 }
 682
 683 /* Specific to the THOR protocol */
 684 static void thor_set_dma(void *addr, int len)
 685 {
 686         struct thor_dev *dev = thor_func->dev;
 687
 688         debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
 689         debug("addr:%p, len:%d\n", addr, len);
 690
 691         dev->out_req->buf = addr;
 692         dev->out_req->length = len;
 693 }
 694
 695 int thor_init(void)
 696 {
 697         struct thor_dev *dev = thor_func->dev;
 698
 699         /* Wait for a device enumeration and configuration settings */
 700         debug("THOR enumeration/configuration setting....\n");
 701         while (!dev->configuration_done)
 702                 usb_gadget_handle_interrupts(0);
 703
 704         thor_set_dma(thor_rx_data_buf, strlen("THOR"));
 705         /* detect the download request from Host PC */
 706         if (thor_rx_data() < 0) {
 707                 printf("%s: Data not received!\n", __func__);
 708                 return -1;
 709         }
 710
 711         if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) {
 712                 puts("Download request from the Host PC\n");
 713                 udelay(30 * 1000); /* 30 ms */
 714
 715                 strcpy((char *)thor_tx_data_buf, "ROHT");
 716                 thor_tx_data(thor_tx_data_buf, strlen("ROHT"));
 717         } else {
 718                 puts("Wrong reply information\n");
 719                 return -1;
 720         }
 721
 722         return 0;
 723 }
 724
 725 int thor_handle(void)
 726 {
 727         int ret;
 728
 729         /* receive the data from Host PC */
 730         while (1) {
 731                 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
 732                 ret = thor_rx_data();
 733
 734                 if (ret > 0) {
 735                         ret = process_data();
 736 #ifdef CONFIG_THOR_RESET_OFF
 737                         if (ret == RESET_DONE)
 738                                 break;
 739 #endif
 740                         if (ret < 0)
 741                                 return ret;
 742                 } else {
 743                         printf("%s: No data received!\n", __func__);
 744                         break;
 745                 }
 746         }
 747
 748         return 0;
 749 }
 750
 751 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f)
 752 {
 753         struct usb_gadget *gadget = c->cdev->gadget;
 754         struct f_thor *f_thor = func_to_thor(f);
 755         struct thor_dev *dev;
 756         struct usb_ep *ep;
 757         int status;
 758
 759         thor_func = f_thor;
 760         dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev));
 761         if (!dev)
 762                 return -ENOMEM;
 763
 764         memset(dev, 0, sizeof(*dev));
 765         dev->gadget = gadget;
 766         f_thor->dev = dev;
 767
 768         debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n",
 769               __func__, c, f);
 770         debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev);
 771
 772         /* EP0  */
 773         /* preallocate control response and buffer */
 774         dev->req = usb_ep_alloc_request(gadget->ep0, 0);
 775         if (!dev->req) {
 776                 status = -ENOMEM;
 777                 goto fail;
 778         }
 779         dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
 780                                  THOR_PACKET_SIZE);
 781         if (!dev->req->buf) {
 782                 status = -ENOMEM;
 783                 goto fail;
 784         }
 785
 786         dev->req->complete = thor_setup_complete;
 787
 788         /* DYNAMIC interface numbers assignments */
 789         status = usb_interface_id(c, f);
 790
 791         if (status < 0)
 792                 goto fail;
 793
 794         thor_downloader_intf_int.bInterfaceNumber = status;
 795         thor_downloader_cdc_union.bMasterInterface0 = status;
 796
 797         status = usb_interface_id(c, f);
 798
 799         if (status < 0)
 800                 goto fail;
 801
 802         thor_downloader_intf_data.bInterfaceNumber = status;
 803         thor_downloader_cdc_union.bSlaveInterface0 = status;
 804
 805         /* allocate instance-specific endpoints */
 806         ep = usb_ep_autoconfig(gadget, &fs_in_desc);
 807         if (!ep) {
 808                 status = -ENODEV;
 809                 goto fail;
 810         }
 811
 812         if (gadget_is_dualspeed(gadget)) {
 813                 hs_in_desc.bEndpointAddress =
 814                                 fs_in_desc.bEndpointAddress;
 815         }
 816
 817         dev->in_ep = ep; /* Store IN EP for enabling @ setup */
 818         ep->driver_data = dev;
 819
 820         ep = usb_ep_autoconfig(gadget, &fs_out_desc);
 821         if (!ep) {
 822                 status = -ENODEV;
 823                 goto fail;
 824         }
 825
 826         if (gadget_is_dualspeed(gadget))
 827                 hs_out_desc.bEndpointAddress =
 828                                 fs_out_desc.bEndpointAddress;
 829
 830         dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
 831         ep->driver_data = dev;
 832
 833         ep = usb_ep_autoconfig(gadget, &fs_int_desc);
 834         if (!ep) {
 835                 status = -ENODEV;
 836                 goto fail;
 837         }
 838
 839         dev->int_ep = ep;
 840         ep->driver_data = dev;
 841
 842         if (gadget_is_dualspeed(gadget)) {
 843                 hs_int_desc.bEndpointAddress =
 844                                 fs_int_desc.bEndpointAddress;
 845
 846                 f->hs_descriptors = (struct usb_descriptor_header **)
 847                         &hs_thor_downloader_function;
 848
 849                 if (!f->hs_descriptors)
 850                         goto fail;
 851         }
 852
 853         debug("%s: out_ep:%p out_req:%p\n", __func__,
 854               dev->out_ep, dev->out_req);
 855
 856         return 0;
 857
 858  fail:
 859         free(dev);
 860         return status;
 861 }
 862
 863 static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
 864 {
 865         free(req->buf);
 866         usb_ep_free_request(ep, req);
 867 }
 868
 869 static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
 870 {
 871         struct f_thor *f_thor = func_to_thor(f);
 872         struct thor_dev *dev = f_thor->dev;
 873
 874         free(dev);
 875         memset(thor_func, 0, sizeof(*thor_func));
 876         thor_func = NULL;
 877 }
 878
 879 static void thor_func_disable(struct usb_function *f)
 880 {
 881         struct f_thor *f_thor = func_to_thor(f);
 882         struct thor_dev *dev = f_thor->dev;
 883
 884         debug("%s:\n", __func__);
 885
 886         /* Avoid freeing memory when ep is still claimed */
 887         if (dev->in_ep->driver_data) {
 888                 free_ep_req(dev->in_ep, dev->in_req);
 889                 usb_ep_disable(dev->in_ep);
 890                 dev->in_ep->driver_data = NULL;
 891         }
 892
 893         if (dev->out_ep->driver_data) {
 894                 free(dev->out_req->buf);
 895                 dev->out_req->buf = NULL;
 896                 usb_ep_free_request(dev->out_ep, dev->out_req);
 897                 usb_ep_disable(dev->out_ep);
 898                 dev->out_ep->driver_data = NULL;
 899         }
 900
 901         if (dev->int_ep->driver_data) {
 902                 usb_ep_disable(dev->int_ep);
 903                 dev->int_ep->driver_data = NULL;
 904         }
 905 }
 906
 907 static int thor_eps_setup(struct usb_function *f)
 908 {
 909         struct usb_composite_dev *cdev = f->config->cdev;
 910         struct usb_gadget *gadget = cdev->gadget;
 911         struct thor_dev *dev = thor_func->dev;
 912         struct usb_endpoint_descriptor *d;
 913         struct usb_request *req;
 914         struct usb_ep *ep;
 915         int result;
 916
 917         ep = dev->in_ep;
 918         d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
 919         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 920
 921         result = usb_ep_enable(ep, d);
 922         if (result)
 923                 goto exit;
 924
 925         ep->driver_data = cdev; /* claim */
 926         req = thor_start_ep(ep);
 927         if (!req) {
 928                 usb_ep_disable(ep);
 929                 result = -EIO;
 930                 goto exit;
 931         }
 932
 933         dev->in_req = req;
 934         ep = dev->out_ep;
 935         d = ep_desc(gadget, &hs_out_desc, &fs_out_desc);
 936         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 937
 938         result = usb_ep_enable(ep, d);
 939         if (result)
 940                 goto exit;
 941
 942         ep->driver_data = cdev; /* claim */
 943         req = thor_start_ep(ep);
 944         if (!req) {
 945                 usb_ep_disable(ep);
 946                 result = -EIO;
 947                 goto exit;
 948         }
 949
 950         dev->out_req = req;
 951         /* ACM control EP */
 952         ep = dev->int_ep;
 953         ep->driver_data = cdev; /* claim */
 954
 955  exit:
 956         return result;
 957 }
 958
 959 static int thor_func_set_alt(struct usb_function *f,
 960                              unsigned intf, unsigned alt)
 961 {
 962         struct thor_dev *dev = thor_func->dev;
 963         int result;
 964
 965         debug("%s: func: %s intf: %d alt: %d\n",
 966               __func__, f->name, intf, alt);
 967
 968         switch (intf) {
 969         case 0:
 970                 debug("ACM INTR interface\n");
 971                 break;
 972         case 1:
 973                 debug("Communication Data interface\n");
 974                 result = thor_eps_setup(f);
 975                 if (result)
 976                         pr_err("%s: EPs setup failed!", __func__);
 977                 dev->configuration_done = 1;
 978                 break;
 979         }
 980
 981         return 0;
 982 }
 983
 984 static int thor_func_init(struct usb_configuration *c)
 985 {
 986         struct f_thor *f_thor;
 987         int status;
 988
 989         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 990
 991         f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
 992         if (!f_thor)
 993                 return -ENOMEM;
 994
 995         memset(f_thor, 0, sizeof(*f_thor));
 996
 997         f_thor->usb_function.name = "f_thor";
 998         f_thor->usb_function.bind = thor_func_bind;
 999         f_thor->usb_function.unbind = thor_unbind;
1000         f_thor->usb_function.setup = thor_func_setup;
1001         f_thor->usb_function.set_alt = thor_func_set_alt;
1002         f_thor->usb_function.disable = thor_func_disable;
1003
1004         status = usb_add_function(c, &f_thor->usb_function);
1005         if (status)
1006                 free(f_thor);
1007
1008         return status;
1009 }
1010
1011 int thor_add(struct usb_configuration *c)
1012 {
1013         debug("%s:\n", __func__);
1014         return thor_func_init(c);
1015 }
1016
1017 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add);