drivers/usb/gadget/f_thor.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * f_thor.c -- USB TIZEN THOR Downloader gadget function
   4  *
   5  * Copyright (C) 2013 Samsung Electronics
   6  * Lukasz Majewski <l.majewski@samsung.com>
   7  *
   8  * Based on code from:
   9  * git://review.tizen.org/kernel/u-boot
  10  *
  11  * Developed by:
  12  * Copyright (C) 2009 Samsung Electronics
  13  * Minkyu Kang <mk7.kang@samsung.com>
  14  * Sanghee Kim <sh0130.kim@samsung.com>
  15  */
  16
  17 #include <errno.h>
  18 #include <common.h>
  19 #include <console.h>
  20 #include <malloc.h>
  21 #include <memalign.h>
  22 #include <version.h>
  23 #include <linux/usb/ch9.h>
  24 #include <linux/usb/gadget.h>
  25 #include <linux/usb/composite.h>
  26 #include <linux/usb/cdc.h>
  27 #include <g_dnl.h>
  28 #include <dfu.h>
  29
  30 #include "f_thor.h"
  31
  32 static void thor_tx_data(unsigned char *data, int len);
  33 static void thor_set_dma(void *addr, int len);
  34 static int thor_rx_data(void);
  35
  36 static struct f_thor *thor_func;
  37 static inline struct f_thor *func_to_thor(struct usb_function *f)
  38 {
  39         return container_of(f, struct f_thor, usb_function);
  40 }
  41
  42 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_tx_data_buf,
  43                           sizeof(struct rsp_box));
  44 DEFINE_CACHE_ALIGN_BUFFER(unsigned char, thor_rx_data_buf,
  45                           sizeof(struct rqt_box));
  46
  47 /* ********************************************************** */
  48 /*         THOR protocol - transmission handling              */
  49 /* ********************************************************** */
  50 DEFINE_CACHE_ALIGN_BUFFER(char, f_name, F_NAME_BUF_SIZE + 1);
  51 static unsigned long long int thor_file_size;
  52 static int alt_setting_num;
  53
  54 static void send_rsp(const struct rsp_box *rsp)
  55 {
  56         memcpy(thor_tx_data_buf, rsp, sizeof(struct rsp_box));
  57         thor_tx_data(thor_tx_data_buf, sizeof(struct rsp_box));
  58
  59         debug("-RSP: %d, %d\n", rsp->rsp, rsp->rsp_data);
  60 }
  61
  62 static void send_data_rsp(s32 ack, s32 count)
  63 {
  64         ALLOC_CACHE_ALIGN_BUFFER(struct data_rsp_box, rsp,
  65                                  sizeof(struct data_rsp_box));
  66
  67         rsp->ack = ack;
  68         rsp->count = count;
  69
  70         memcpy(thor_tx_data_buf, rsp, sizeof(struct data_rsp_box));
  71         thor_tx_data(thor_tx_data_buf, sizeof(struct data_rsp_box));
  72
  73         debug("-DATA RSP: %d, %d\n", ack, count);
  74 }
  75
  76 static int process_rqt_info(const struct rqt_box *rqt)
  77 {
  78         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
  79         memset(rsp, 0, sizeof(struct rsp_box));
  80
  81         rsp->rsp = rqt->rqt;
  82         rsp->rsp_data = rqt->rqt_data;
  83
  84         switch (rqt->rqt_data) {
  85         case RQT_INFO_VER_PROTOCOL:
  86                 rsp->int_data[0] = VER_PROTOCOL_MAJOR;
  87                 rsp->int_data[1] = VER_PROTOCOL_MINOR;
  88                 break;
  89         case RQT_INIT_VER_HW:
  90                 snprintf(rsp->str_data[0], sizeof(rsp->str_data[0]),
  91                          "%x", checkboard());
  92                 break;
  93         case RQT_INIT_VER_BOOT:
  94                 sprintf(rsp->str_data[0], "%s", U_BOOT_VERSION);
  95                 break;
  96         case RQT_INIT_VER_KERNEL:
  97                 sprintf(rsp->str_data[0], "%s", "k unknown");
  98                 break;
  99         case RQT_INIT_VER_PLATFORM:
 100                 sprintf(rsp->str_data[0], "%s", "p unknown");
 101                 break;
 102         case RQT_INIT_VER_CSC:
 103                 sprintf(rsp->str_data[0], "%s", "c unknown");
 104                 break;
 105         default:
 106                 return -EINVAL;
 107         }
 108
 109         send_rsp(rsp);
 110         return true;
 111 }
 112
 113 static int process_rqt_cmd(const struct rqt_box *rqt)
 114 {
 115         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
 116         memset(rsp, 0, sizeof(struct rsp_box));
 117
 118         rsp->rsp = rqt->rqt;
 119         rsp->rsp_data = rqt->rqt_data;
 120
 121         switch (rqt->rqt_data) {
 122         case RQT_CMD_REBOOT:
 123                 debug("TARGET RESET\n");
 124                 send_rsp(rsp);
 125                 g_dnl_unregister();
 126                 dfu_free_entities();
 127 #ifdef CONFIG_THOR_RESET_OFF
 128                 return RESET_DONE;
 129 #endif
 130                 run_command("reset", 0);
 131                 break;
 132         case RQT_CMD_POWEROFF:
 133         case RQT_CMD_EFSCLEAR:
 134                 send_rsp(rsp);
 135         default:
 136                 printf("Command not supported -> cmd: %d\n", rqt->rqt_data);
 137                 return -EINVAL;
 138         }
 139
 140         return true;
 141 }
 142
 143 static long long int download_head(unsigned long long total,
 144                                    unsigned int packet_size,
 145                                    long long int *left,
 146                                    int *cnt)
 147 {
 148         long long int rcv_cnt = 0, left_to_rcv, ret_rcv;
 149         struct dfu_entity *dfu_entity = dfu_get_entity(alt_setting_num);
 150         void *transfer_buffer = dfu_get_buf(dfu_entity);
 151         void *buf = transfer_buffer;
 152         int usb_pkt_cnt = 0, ret;
 153
 154         /*
 155          * Files smaller than THOR_STORE_UNIT_SIZE (now 32 MiB) are stored on
 156          * the medium.
 157          * The packet response is sent on the purpose after successful data
 158          * chunk write. There is a room for improvement when asynchronous write
 159          * is performed.
 160          */
 161         while (total - rcv_cnt >= packet_size) {
 162                 thor_set_dma(buf, packet_size);
 163                 buf += packet_size;
 164                 ret_rcv = thor_rx_data();
 165                 if (ret_rcv < 0)
 166                         return ret_rcv;
 167                 rcv_cnt += ret_rcv;
 168                 debug("%d: RCV data count: %llu cnt: %d\n", usb_pkt_cnt,
 169                       rcv_cnt, *cnt);
 170
 171                 if ((rcv_cnt % THOR_STORE_UNIT_SIZE) == 0) {
 172                         ret = dfu_write(dfu_get_entity(alt_setting_num),
 173                                         transfer_buffer, THOR_STORE_UNIT_SIZE,
 174                                         (*cnt)++);
 175                         if (ret) {
 176                                 pr_err("DFU write failed [%d] cnt: %d",
 177                                       ret, *cnt);
 178                                 return ret;
 179                         }
 180                         buf = transfer_buffer;
 181                 }
 182                 send_data_rsp(0, ++usb_pkt_cnt);
 183         }
 184
 185         /* Calculate the amount of data to arrive from PC (in bytes) */
 186         left_to_rcv = total - rcv_cnt;
 187
 188         /*
 189          * Calculate number of data already received. but not yet stored
 190          * on the medium (they are smaller than THOR_STORE_UNIT_SIZE)
 191          */
 192         *left = left_to_rcv + buf - transfer_buffer;
 193         debug("%s: left: %llu left_to_rcv: %llu buf: 0x%p\n", __func__,
 194               *left, left_to_rcv, buf);
 195
 196         if (left_to_rcv) {
 197                 thor_set_dma(buf, packet_size);
 198                 ret_rcv = thor_rx_data();
 199                 if (ret_rcv < 0)
 200                         return ret_rcv;
 201                 rcv_cnt += ret_rcv;
 202                 send_data_rsp(0, ++usb_pkt_cnt);
 203         }
 204
 205         debug("%s: %llu total: %llu cnt: %d\n", __func__, rcv_cnt, total, *cnt);
 206
 207         return rcv_cnt;
 208 }
 209
 210 static int download_tail(long long int left, int cnt)
 211 {
 212         struct dfu_entity *dfu_entity;
 213         void *transfer_buffer;
 214         int ret;
 215
 216         debug("%s: left: %llu cnt: %d\n", __func__, left, cnt);
 217
 218         dfu_entity = dfu_get_entity(alt_setting_num);
 219         if (!dfu_entity) {
 220                 pr_err("Alt setting: %d entity not found!\n", alt_setting_num);
 221                 return -ENOENT;
 222         }
 223
 224         transfer_buffer = dfu_get_buf(dfu_entity);
 225         if (!transfer_buffer) {
 226                 pr_err("Transfer buffer not allocated!");
 227                 return -ENXIO;
 228         }
 229
 230         if (left) {
 231                 ret = dfu_write(dfu_entity, transfer_buffer, left, cnt++);
 232                 if (ret) {
 233                         pr_err("DFU write failed [%d]: left: %llu", ret, left);
 234                         return ret;
 235                 }
 236         }
 237
 238         /*
 239          * To store last "packet" or write file from buffer to filesystem
 240          * DFU storage backend requires dfu_flush
 241          *
 242          * This also frees memory malloc'ed by dfu_get_buf(), so no explicit
 243          * need fo call dfu_free_buf() is needed.
 244          */
 245         ret = dfu_flush(dfu_entity, transfer_buffer, 0, cnt);
 246         if (ret)
 247                 pr_err("DFU flush failed!");
 248
 249         return ret;
 250 }
 251
 252 static long long int process_rqt_download(const struct rqt_box *rqt)
 253 {
 254         ALLOC_CACHE_ALIGN_BUFFER(struct rsp_box, rsp, sizeof(struct rsp_box));
 255         static long long int left, ret_head;
 256         int file_type, ret = 0;
 257         static int cnt;
 258
 259         memset(rsp, 0, sizeof(struct rsp_box));
 260         rsp->rsp = rqt->rqt;
 261         rsp->rsp_data = rqt->rqt_data;
 262
 263         switch (rqt->rqt_data) {
 264         case RQT_DL_INIT:
 265                 thor_file_size = (unsigned long long int)rqt->int_data[0] +
 266                                  (((unsigned long long int)rqt->int_data[1])
 267                                   << 32);
 268                 debug("INIT: total %llu bytes\n", thor_file_size);
 269                 break;
 270         case RQT_DL_FILE_INFO:
 271                 file_type = rqt->int_data[0];
 272                 if (file_type == FILE_TYPE_PIT) {
 273                         puts("PIT table file - not supported\n");
 274                         rsp->ack = -ENOTSUPP;
 275                         ret = rsp->ack;
 276                         break;
 277                 }
 278
 279                 thor_file_size = (unsigned long long int)rqt->int_data[1] +
 280                                  (((unsigned long long int)rqt->int_data[2])
 281                                   << 32);
 282                 memcpy(f_name, rqt->str_data[0], F_NAME_BUF_SIZE);
 283                 f_name[F_NAME_BUF_SIZE] = '\0';
 284
 285                 debug("INFO: name(%s, %d), size(%llu), type(%d)\n",
 286                       f_name, 0, thor_file_size, file_type);
 287
 288                 rsp->int_data[0] = THOR_PACKET_SIZE;
 289
 290                 alt_setting_num = dfu_get_alt(f_name);
 291                 if (alt_setting_num < 0) {
 292                         pr_err("Alt setting [%d] to write not found!",
 293                               alt_setting_num);
 294                         rsp->ack = -ENODEV;
 295                         ret = rsp->ack;
 296                 }
 297                 break;
 298         case RQT_DL_FILE_START:
 299                 send_rsp(rsp);
 300                 ret_head = download_head(thor_file_size, THOR_PACKET_SIZE,
 301                                          &left, &cnt);
 302                 if (ret_head < 0) {
 303                         left = 0;
 304                         cnt = 0;
 305                 }
 306                 return ret_head;
 307         case RQT_DL_FILE_END:
 308                 debug("DL FILE_END\n");
 309                 rsp->ack = download_tail(left, cnt);
 310                 ret = rsp->ack;
 311                 left = 0;
 312                 cnt = 0;
 313                 break;
 314         case RQT_DL_EXIT:
 315                 debug("DL EXIT\n");
 316                 break;
 317         default:
 318                 pr_err("Operation not supported: %d", rqt->rqt_data);
 319                 ret = -ENOTSUPP;
 320         }
 321
 322         send_rsp(rsp);
 323         return ret;
 324 }
 325
 326 static int process_data(void)
 327 {
 328         ALLOC_CACHE_ALIGN_BUFFER(struct rqt_box, rqt, sizeof(struct rqt_box));
 329         int ret = -EINVAL;
 330
 331         memcpy(rqt, thor_rx_data_buf, sizeof(struct rqt_box));
 332
 333         debug("+RQT: %d, %d\n", rqt->rqt, rqt->rqt_data);
 334
 335         switch (rqt->rqt) {
 336         case RQT_INFO:
 337                 ret = process_rqt_info(rqt);
 338                 break;
 339         case RQT_CMD:
 340                 ret = process_rqt_cmd(rqt);
 341                 break;
 342         case RQT_DL:
 343                 ret = (int) process_rqt_download(rqt);
 344                 break;
 345         case RQT_UL:
 346                 puts("RQT: UPLOAD not supported!\n");
 347                 break;
 348         default:
 349                 pr_err("unknown request (%d)", rqt->rqt);
 350         }
 351
 352         return ret;
 353 }
 354
 355 /* ********************************************************** */
 356 /*         THOR USB Function                                  */
 357 /* ********************************************************** */
 358
 359 static inline struct usb_endpoint_descriptor *
 360 ep_desc(struct usb_gadget *g, struct usb_endpoint_descriptor *hs,
 361         struct usb_endpoint_descriptor *fs)
 362 {
 363         if (gadget_is_dualspeed(g) && g->speed == USB_SPEED_HIGH)
 364                 return hs;
 365         return fs;
 366 }
 367
 368 static struct usb_interface_descriptor thor_downloader_intf_data = {
 369         .bLength =              sizeof(thor_downloader_intf_data),
 370         .bDescriptorType =      USB_DT_INTERFACE,
 371
 372         .bNumEndpoints =        2,
 373         .bInterfaceClass =      USB_CLASS_CDC_DATA,
 374 };
 375
 376 static struct usb_endpoint_descriptor fs_in_desc = {
 377         .bLength =              USB_DT_ENDPOINT_SIZE,
 378         .bDescriptorType =      USB_DT_ENDPOINT,
 379
 380         .bEndpointAddress =     USB_DIR_IN,
 381         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 382 };
 383
 384 static struct usb_endpoint_descriptor fs_out_desc = {
 385         .bLength =              USB_DT_ENDPOINT_SIZE,
 386         .bDescriptorType =      USB_DT_ENDPOINT,
 387
 388         .bEndpointAddress =     USB_DIR_OUT,
 389         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 390 };
 391
 392 /* CDC configuration */
 393 static struct usb_interface_descriptor thor_downloader_intf_int = {
 394         .bLength =              sizeof(thor_downloader_intf_int),
 395         .bDescriptorType =      USB_DT_INTERFACE,
 396
 397         .bNumEndpoints =        1,
 398         .bInterfaceClass =      USB_CLASS_COMM,
 399          /* 0x02 Abstract Line Control Model */
 400         .bInterfaceSubClass =   USB_CDC_SUBCLASS_ACM,
 401         /* 0x01 Common AT commands */
 402         .bInterfaceProtocol =   USB_CDC_ACM_PROTO_AT_V25TER,
 403 };
 404
 405 static struct usb_cdc_header_desc thor_downloader_cdc_header = {
 406         .bLength         =    sizeof(thor_downloader_cdc_header),
 407         .bDescriptorType =    0x24, /* CS_INTERFACE */
 408         .bDescriptorSubType = 0x00,
 409         .bcdCDC =             0x0110,
 410 };
 411
 412 static struct usb_cdc_call_mgmt_descriptor thor_downloader_cdc_call = {
 413         .bLength         =    sizeof(thor_downloader_cdc_call),
 414         .bDescriptorType =    0x24, /* CS_INTERFACE */
 415         .bDescriptorSubType = 0x01,
 416         .bmCapabilities =     0x00,
 417         .bDataInterface =     0x01,
 418 };
 419
 420 static struct usb_cdc_acm_descriptor thor_downloader_cdc_abstract = {
 421         .bLength         =    sizeof(thor_downloader_cdc_abstract),
 422         .bDescriptorType =    0x24, /* CS_INTERFACE */
 423         .bDescriptorSubType = 0x02,
 424         .bmCapabilities =     0x00,
 425 };
 426
 427 static struct usb_cdc_union_desc thor_downloader_cdc_union = {
 428         .bLength         =     sizeof(thor_downloader_cdc_union),
 429         .bDescriptorType =     0x24, /* CS_INTERFACE */
 430         .bDescriptorSubType =  USB_CDC_UNION_TYPE,
 431 };
 432
 433 static struct usb_endpoint_descriptor fs_int_desc = {
 434         .bLength = USB_DT_ENDPOINT_SIZE,
 435         .bDescriptorType = USB_DT_ENDPOINT,
 436
 437         .bEndpointAddress = 3 | USB_DIR_IN,
 438         .bmAttributes = USB_ENDPOINT_XFER_INT,
 439         .wMaxPacketSize = __constant_cpu_to_le16(16),
 440
 441         .bInterval = 0x9,
 442 };
 443
 444 static struct usb_interface_assoc_descriptor
 445 thor_iad_descriptor = {
 446         .bLength =              sizeof(thor_iad_descriptor),
 447         .bDescriptorType =      USB_DT_INTERFACE_ASSOCIATION,
 448
 449         .bFirstInterface =      0,
 450         .bInterfaceCount =      2,      /* control + data */
 451         .bFunctionClass =       USB_CLASS_COMM,
 452         .bFunctionSubClass =    USB_CDC_SUBCLASS_ACM,
 453         .bFunctionProtocol =    USB_CDC_PROTO_NONE,
 454 };
 455
 456 static struct usb_endpoint_descriptor hs_in_desc = {
 457         .bLength =              USB_DT_ENDPOINT_SIZE,
 458         .bDescriptorType =      USB_DT_ENDPOINT,
 459
 460         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 461         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 462 };
 463
 464 static struct usb_endpoint_descriptor hs_out_desc = {
 465         .bLength =              USB_DT_ENDPOINT_SIZE,
 466         .bDescriptorType =      USB_DT_ENDPOINT,
 467
 468         .bmAttributes = USB_ENDPOINT_XFER_BULK,
 469         .wMaxPacketSize =       __constant_cpu_to_le16(512),
 470 };
 471
 472 static struct usb_endpoint_descriptor hs_int_desc = {
 473         .bLength = USB_DT_ENDPOINT_SIZE,
 474         .bDescriptorType = USB_DT_ENDPOINT,
 475
 476         .bmAttributes = USB_ENDPOINT_XFER_INT,
 477         .wMaxPacketSize = __constant_cpu_to_le16(16),
 478
 479         .bInterval = 0x9,
 480 };
 481
 482 /*
 483  * This attribute vendor descriptor is necessary for correct operation with
 484  * Windows version of THOR download program
 485  *
 486  * It prevents windows driver from sending zero lenght packet (ZLP) after
 487  * each THOR_PACKET_SIZE. This assures consistent behaviour with libusb
 488  */
 489 static struct usb_cdc_attribute_vendor_descriptor thor_downloader_cdc_av = {
 490         .bLength =              sizeof(thor_downloader_cdc_av),
 491         .bDescriptorType =      0x24,
 492         .bDescriptorSubType =   0x80,
 493         .DAUType =              0x0002,
 494         .DAULength =            0x0001,
 495         .DAUValue =             0x00,
 496 };
 497
 498 static const struct usb_descriptor_header *hs_thor_downloader_function[] = {
 499         (struct usb_descriptor_header *)&thor_iad_descriptor,
 500
 501         (struct usb_descriptor_header *)&thor_downloader_intf_int,
 502         (struct usb_descriptor_header *)&thor_downloader_cdc_header,
 503         (struct usb_descriptor_header *)&thor_downloader_cdc_call,
 504         (struct usb_descriptor_header *)&thor_downloader_cdc_abstract,
 505         (struct usb_descriptor_header *)&thor_downloader_cdc_union,
 506         (struct usb_descriptor_header *)&hs_int_desc,
 507
 508         (struct usb_descriptor_header *)&thor_downloader_intf_data,
 509         (struct usb_descriptor_header *)&thor_downloader_cdc_av,
 510         (struct usb_descriptor_header *)&hs_in_desc,
 511         (struct usb_descriptor_header *)&hs_out_desc,
 512         NULL,
 513 };
 514
 515 /*-------------------------------------------------------------------------*/
 516 static struct usb_request *alloc_ep_req(struct usb_ep *ep, unsigned length)
 517 {
 518         struct usb_request *req;
 519
 520         req = usb_ep_alloc_request(ep, 0);
 521         if (!req)
 522                 return req;
 523
 524         req->length = length;
 525         req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE, length);
 526         if (!req->buf) {
 527                 usb_ep_free_request(ep, req);
 528                 req = NULL;
 529         }
 530
 531         return req;
 532 }
 533
 534 static int thor_rx_data(void)
 535 {
 536         struct thor_dev *dev = thor_func->dev;
 537         int data_to_rx, tmp, status;
 538
 539         data_to_rx = dev->out_req->length;
 540         tmp = data_to_rx;
 541         do {
 542                 dev->out_req->length = data_to_rx;
 543                 debug("dev->out_req->length:%d dev->rxdata:%d\n",
 544                       dev->out_req->length, dev->rxdata);
 545
 546                 status = usb_ep_queue(dev->out_ep, dev->out_req, 0);
 547                 if (status) {
 548                         pr_err("kill %s:  resubmit %d bytes --> %d",
 549                               dev->out_ep->name, dev->out_req->length, status);
 550                         usb_ep_set_halt(dev->out_ep);
 551                         return -EAGAIN;
 552                 }
 553
 554                 while (!dev->rxdata) {
 555                         usb_gadget_handle_interrupts(0);
 556                         if (ctrlc())
 557                                 return -1;
 558                 }
 559                 dev->rxdata = 0;
 560                 data_to_rx -= dev->out_req->actual;
 561         } while (data_to_rx);
 562
 563         return tmp;
 564 }
 565
 566 static void thor_tx_data(unsigned char *data, int len)
 567 {
 568         struct thor_dev *dev = thor_func->dev;
 569         unsigned char *ptr = dev->in_req->buf;
 570         int status;
 571
 572         memset(ptr, 0, len);
 573         memcpy(ptr, data, len);
 574
 575         dev->in_req->length = len;
 576
 577         debug("%s: dev->in_req->length:%d to_cpy:%zd\n", __func__,
 578               dev->in_req->length, sizeof(data));
 579
 580         status = usb_ep_queue(dev->in_ep, dev->in_req, 0);
 581         if (status) {
 582                 pr_err("kill %s:  resubmit %d bytes --> %d",
 583                       dev->in_ep->name, dev->in_req->length, status);
 584                 usb_ep_set_halt(dev->in_ep);
 585         }
 586
 587         /* Wait until tx interrupt received */
 588         while (!dev->txdata)
 589                 usb_gadget_handle_interrupts(0);
 590
 591         dev->txdata = 0;
 592 }
 593
 594 static void thor_rx_tx_complete(struct usb_ep *ep, struct usb_request *req)
 595 {
 596         struct thor_dev *dev = thor_func->dev;
 597         int status = req->status;
 598
 599         debug("%s: ep_ptr:%p, req_ptr:%p\n", __func__, ep, req);
 600         switch (status) {
 601         case 0:
 602                 if (ep == dev->out_ep)
 603                         dev->rxdata = 1;
 604                 else
 605                         dev->txdata = 1;
 606
 607                 break;
 608
 609         /* this endpoint is normally active while we're configured */
 610         case -ECONNABORTED:             /* hardware forced ep reset */
 611         case -ECONNRESET:               /* request dequeued */
 612         case -ESHUTDOWN:                /* disconnect from host */
 613         case -EREMOTEIO:                /* short read */
 614         case -EOVERFLOW:
 615                 pr_err("ERROR:%d", status);
 616                 break;
 617         }
 618
 619         debug("%s complete --> %d, %d/%d\n", ep->name,
 620               status, req->actual, req->length);
 621 }
 622
 623 static struct usb_request *thor_start_ep(struct usb_ep *ep)
 624 {
 625         struct usb_request *req;
 626
 627         req = alloc_ep_req(ep, THOR_PACKET_SIZE);
 628         debug("%s: ep:%p req:%p\n", __func__, ep, req);
 629
 630         if (!req)
 631                 return NULL;
 632
 633         memset(req->buf, 0, req->length);
 634         req->complete = thor_rx_tx_complete;
 635
 636         return req;
 637 }
 638
 639 static void thor_setup_complete(struct usb_ep *ep, struct usb_request *req)
 640 {
 641         if (req->status || req->actual != req->length)
 642                 debug("setup complete --> %d, %d/%d\n",
 643                       req->status, req->actual, req->length);
 644 }
 645
 646 static int
 647 thor_func_setup(struct usb_function *f, const struct usb_ctrlrequest *ctrl)
 648 {
 649         struct thor_dev *dev = thor_func->dev;
 650         struct usb_request *req = dev->req;
 651         struct usb_gadget *gadget = dev->gadget;
 652         int value = 0;
 653
 654         u16 len = le16_to_cpu(ctrl->wLength);
 655
 656         debug("Req_Type: 0x%x Req: 0x%x wValue: 0x%x wIndex: 0x%x wLen: 0x%x\n",
 657               ctrl->bRequestType, ctrl->bRequest, ctrl->wValue, ctrl->wIndex,
 658               ctrl->wLength);
 659
 660         switch (ctrl->bRequest) {
 661         case USB_CDC_REQ_SET_CONTROL_LINE_STATE:
 662                 value = 0;
 663                 break;
 664         case USB_CDC_REQ_SET_LINE_CODING:
 665                 value = len;
 666                 /* Line Coding set done = configuration done */
 667                 thor_func->dev->configuration_done = 1;
 668                 break;
 669
 670         default:
 671                 pr_err("thor_setup: unknown request: %d", ctrl->bRequest);
 672         }
 673
 674         if (value >= 0) {
 675                 req->length = value;
 676                 req->zero = value < len;
 677                 value = usb_ep_queue(gadget->ep0, req, 0);
 678                 if (value < 0) {
 679                         debug("%s: ep_queue: %d\n", __func__, value);
 680                         req->status = 0;
 681                 }
 682         }
 683
 684         return value;
 685 }
 686
 687 /* Specific to the THOR protocol */
 688 static void thor_set_dma(void *addr, int len)
 689 {
 690         struct thor_dev *dev = thor_func->dev;
 691
 692         debug("in_req:%p, out_req:%p\n", dev->in_req, dev->out_req);
 693         debug("addr:%p, len:%d\n", addr, len);
 694
 695         dev->out_req->buf = addr;
 696         dev->out_req->length = len;
 697 }
 698
 699 int thor_init(void)
 700 {
 701         struct thor_dev *dev = thor_func->dev;
 702
 703         /* Wait for a device enumeration and configuration settings */
 704         debug("THOR enumeration/configuration setting....\n");
 705         while (!dev->configuration_done)
 706                 usb_gadget_handle_interrupts(0);
 707
 708         thor_set_dma(thor_rx_data_buf, strlen("THOR"));
 709         /* detect the download request from Host PC */
 710         if (thor_rx_data() < 0) {
 711                 printf("%s: Data not received!\n", __func__);
 712                 return -1;
 713         }
 714
 715         if (!strncmp((char *)thor_rx_data_buf, "THOR", strlen("THOR"))) {
 716                 puts("Download request from the Host PC\n");
 717                 udelay(30 * 1000); /* 30 ms */
 718
 719                 strcpy((char *)thor_tx_data_buf, "ROHT");
 720                 thor_tx_data(thor_tx_data_buf, strlen("ROHT"));
 721         } else {
 722                 puts("Wrong reply information\n");
 723                 return -1;
 724         }
 725
 726         return 0;
 727 }
 728
 729 int thor_handle(void)
 730 {
 731         int ret;
 732
 733         /* receive the data from Host PC */
 734         while (1) {
 735                 thor_set_dma(thor_rx_data_buf, sizeof(struct rqt_box));
 736                 ret = thor_rx_data();
 737
 738                 if (ret > 0) {
 739                         ret = process_data();
 740 #ifdef CONFIG_THOR_RESET_OFF
 741                         if (ret == RESET_DONE)
 742                                 break;
 743 #endif
 744                         if (ret < 0)
 745                                 return ret;
 746                 } else {
 747                         printf("%s: No data received!\n", __func__);
 748                         break;
 749                 }
 750         }
 751
 752         return 0;
 753 }
 754
 755 static int thor_func_bind(struct usb_configuration *c, struct usb_function *f)
 756 {
 757         struct usb_gadget *gadget = c->cdev->gadget;
 758         struct f_thor *f_thor = func_to_thor(f);
 759         struct thor_dev *dev;
 760         struct usb_ep *ep;
 761         int status;
 762
 763         thor_func = f_thor;
 764         dev = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*dev));
 765         if (!dev)
 766                 return -ENOMEM;
 767
 768         memset(dev, 0, sizeof(*dev));
 769         dev->gadget = gadget;
 770         f_thor->dev = dev;
 771
 772         debug("%s: usb_configuration: 0x%p usb_function: 0x%p\n",
 773               __func__, c, f);
 774         debug("f_thor: 0x%p thor: 0x%p\n", f_thor, dev);
 775
 776         /* EP0  */
 777         /* preallocate control response and buffer */
 778         dev->req = usb_ep_alloc_request(gadget->ep0, 0);
 779         if (!dev->req) {
 780                 status = -ENOMEM;
 781                 goto fail;
 782         }
 783         dev->req->buf = memalign(CONFIG_SYS_CACHELINE_SIZE,
 784                                  THOR_PACKET_SIZE);
 785         if (!dev->req->buf) {
 786                 status = -ENOMEM;
 787                 goto fail;
 788         }
 789
 790         dev->req->complete = thor_setup_complete;
 791
 792         /* DYNAMIC interface numbers assignments */
 793         status = usb_interface_id(c, f);
 794
 795         if (status < 0)
 796                 goto fail;
 797
 798         thor_downloader_intf_int.bInterfaceNumber = status;
 799         thor_downloader_cdc_union.bMasterInterface0 = status;
 800
 801         status = usb_interface_id(c, f);
 802
 803         if (status < 0)
 804                 goto fail;
 805
 806         thor_downloader_intf_data.bInterfaceNumber = status;
 807         thor_downloader_cdc_union.bSlaveInterface0 = status;
 808
 809         /* allocate instance-specific endpoints */
 810         ep = usb_ep_autoconfig(gadget, &fs_in_desc);
 811         if (!ep) {
 812                 status = -ENODEV;
 813                 goto fail;
 814         }
 815
 816         if (gadget_is_dualspeed(gadget)) {
 817                 hs_in_desc.bEndpointAddress =
 818                                 fs_in_desc.bEndpointAddress;
 819         }
 820
 821         dev->in_ep = ep; /* Store IN EP for enabling @ setup */
 822         ep->driver_data = dev;
 823
 824         ep = usb_ep_autoconfig(gadget, &fs_out_desc);
 825         if (!ep) {
 826                 status = -ENODEV;
 827                 goto fail;
 828         }
 829
 830         if (gadget_is_dualspeed(gadget))
 831                 hs_out_desc.bEndpointAddress =
 832                                 fs_out_desc.bEndpointAddress;
 833
 834         dev->out_ep = ep; /* Store OUT EP for enabling @ setup */
 835         ep->driver_data = dev;
 836
 837         ep = usb_ep_autoconfig(gadget, &fs_int_desc);
 838         if (!ep) {
 839                 status = -ENODEV;
 840                 goto fail;
 841         }
 842
 843         dev->int_ep = ep;
 844         ep->driver_data = dev;
 845
 846         if (gadget_is_dualspeed(gadget)) {
 847                 hs_int_desc.bEndpointAddress =
 848                                 fs_int_desc.bEndpointAddress;
 849
 850                 f->hs_descriptors = (struct usb_descriptor_header **)
 851                         &hs_thor_downloader_function;
 852
 853                 if (!f->hs_descriptors)
 854                         goto fail;
 855         }
 856
 857         debug("%s: out_ep:%p out_req:%p\n", __func__,
 858               dev->out_ep, dev->out_req);
 859
 860         return 0;
 861
 862  fail:
 863         free(dev);
 864         return status;
 865 }
 866
 867 static void free_ep_req(struct usb_ep *ep, struct usb_request *req)
 868 {
 869         free(req->buf);
 870         usb_ep_free_request(ep, req);
 871 }
 872
 873 static void thor_unbind(struct usb_configuration *c, struct usb_function *f)
 874 {
 875         struct f_thor *f_thor = func_to_thor(f);
 876         struct thor_dev *dev = f_thor->dev;
 877
 878         free(dev);
 879         memset(thor_func, 0, sizeof(*thor_func));
 880         thor_func = NULL;
 881 }
 882
 883 static void thor_func_disable(struct usb_function *f)
 884 {
 885         struct f_thor *f_thor = func_to_thor(f);
 886         struct thor_dev *dev = f_thor->dev;
 887
 888         debug("%s:\n", __func__);
 889
 890         /* Avoid freeing memory when ep is still claimed */
 891         if (dev->in_ep->driver_data) {
 892                 free_ep_req(dev->in_ep, dev->in_req);
 893                 usb_ep_disable(dev->in_ep);
 894                 dev->in_ep->driver_data = NULL;
 895         }
 896
 897         if (dev->out_ep->driver_data) {
 898                 free(dev->out_req->buf);
 899                 dev->out_req->buf = NULL;
 900                 usb_ep_free_request(dev->out_ep, dev->out_req);
 901                 usb_ep_disable(dev->out_ep);
 902                 dev->out_ep->driver_data = NULL;
 903         }
 904
 905         if (dev->int_ep->driver_data) {
 906                 usb_ep_disable(dev->int_ep);
 907                 dev->int_ep->driver_data = NULL;
 908         }
 909 }
 910
 911 static int thor_eps_setup(struct usb_function *f)
 912 {
 913         struct usb_composite_dev *cdev = f->config->cdev;
 914         struct usb_gadget *gadget = cdev->gadget;
 915         struct thor_dev *dev = thor_func->dev;
 916         struct usb_endpoint_descriptor *d;
 917         struct usb_request *req;
 918         struct usb_ep *ep;
 919         int result;
 920
 921         ep = dev->in_ep;
 922         d = ep_desc(gadget, &hs_in_desc, &fs_in_desc);
 923         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 924
 925         result = usb_ep_enable(ep, d);
 926         if (result)
 927                 goto exit;
 928
 929         ep->driver_data = cdev; /* claim */
 930         req = thor_start_ep(ep);
 931         if (!req) {
 932                 usb_ep_disable(ep);
 933                 result = -EIO;
 934                 goto exit;
 935         }
 936
 937         dev->in_req = req;
 938         ep = dev->out_ep;
 939         d = ep_desc(gadget, &hs_out_desc, &fs_out_desc);
 940         debug("(d)bEndpointAddress: 0x%x\n", d->bEndpointAddress);
 941
 942         result = usb_ep_enable(ep, d);
 943         if (result)
 944                 goto exit;
 945
 946         ep->driver_data = cdev; /* claim */
 947         req = thor_start_ep(ep);
 948         if (!req) {
 949                 usb_ep_disable(ep);
 950                 result = -EIO;
 951                 goto exit;
 952         }
 953
 954         dev->out_req = req;
 955         /* ACM control EP */
 956         ep = dev->int_ep;
 957         ep->driver_data = cdev; /* claim */
 958
 959  exit:
 960         return result;
 961 }
 962
 963 static int thor_func_set_alt(struct usb_function *f,
 964                              unsigned intf, unsigned alt)
 965 {
 966         struct thor_dev *dev = thor_func->dev;
 967         int result;
 968
 969         debug("%s: func: %s intf: %d alt: %d\n",
 970               __func__, f->name, intf, alt);
 971
 972         switch (intf) {
 973         case 0:
 974                 debug("ACM INTR interface\n");
 975                 break;
 976         case 1:
 977                 debug("Communication Data interface\n");
 978                 result = thor_eps_setup(f);
 979                 if (result)
 980                         pr_err("%s: EPs setup failed!", __func__);
 981                 dev->configuration_done = 1;
 982                 break;
 983         }
 984
 985         return 0;
 986 }
 987
 988 static int thor_func_init(struct usb_configuration *c)
 989 {
 990         struct f_thor *f_thor;
 991         int status;
 992
 993         debug("%s: cdev: 0x%p\n", __func__, c->cdev);
 994
 995         f_thor = memalign(CONFIG_SYS_CACHELINE_SIZE, sizeof(*f_thor));
 996         if (!f_thor)
 997                 return -ENOMEM;
 998
 999         memset(f_thor, 0, sizeof(*f_thor));
1000
1001         f_thor->usb_function.name = "f_thor";
1002         f_thor->usb_function.bind = thor_func_bind;
1003         f_thor->usb_function.unbind = thor_unbind;
1004         f_thor->usb_function.setup = thor_func_setup;
1005         f_thor->usb_function.set_alt = thor_func_set_alt;
1006         f_thor->usb_function.disable = thor_func_disable;
1007
1008         status = usb_add_function(c, &f_thor->usb_function);
1009         if (status)
1010                 free(f_thor);
1011
1012         return status;
1013 }
1014
1015 int thor_add(struct usb_configuration *c)
1016 {
1017         debug("%s:\n", __func__);
1018         return thor_func_init(c);
1019 }
1020
1021 DECLARE_GADGET_BIND_CALLBACK(usb_dnl_thor, thor_add);