common/cmd_load.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * Serial up- and download support
  10  */
  11 #include <common.h>
  12 #include <command.h>
  13 #include <s_record.h>
  14 #include <net.h>
  15 #include <exports.h>
  16 #include <xyzModem.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 #if defined(CONFIG_CMD_LOADB)
  21 static ulong load_serial_ymodem(ulong offset);
  22 #endif
  23
  24 #if defined(CONFIG_CMD_LOADS)
  25 static ulong load_serial(long offset);
  26 static int read_record(char *buf, ulong len);
  27 # if defined(CONFIG_CMD_SAVES)
  28 static int save_serial(ulong offset, ulong size);
  29 static int write_record(char *buf);
  30 #endif
  31
  32 static int do_echo = 1;
  33 #endif
  34
  35 /* -------------------------------------------------------------------- */
  36
  37 #if defined(CONFIG_CMD_LOADS)
  38 static int do_load_serial(cmd_tbl_t *cmdtp, int flag, int argc,
  39                           char * const argv[])
  40 {
  41         long offset = 0;
  42         ulong addr;
  43         int i;
  44         char *env_echo;
  45         int rcode = 0;
  46 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
  47         int load_baudrate, current_baudrate;
  48
  49         load_baudrate = current_baudrate = gd->baudrate;
  50 #endif
  51
  52         if (((env_echo = getenv("loads_echo")) != NULL) && (*env_echo == '1')) {
  53                 do_echo = 1;
  54         } else {
  55                 do_echo = 0;
  56         }
  57
  58 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
  59         if (argc >= 2) {
  60                 offset = simple_strtol(argv[1], NULL, 16);
  61         }
  62         if (argc == 3) {
  63                 load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
  64
  65                 /* default to current baudrate */
  66                 if (load_baudrate == 0)
  67                         load_baudrate = current_baudrate;
  68         }
  69         if (load_baudrate != current_baudrate) {
  70                 printf("## Switch baudrate to %d bps and press ENTER ...\n",
  71                         load_baudrate);
  72                 udelay(50000);
  73                 gd->baudrate = load_baudrate;
  74                 serial_setbrg();
  75                 udelay(50000);
  76                 for (;;) {
  77                         if (getc() == '\r')
  78                                 break;
  79                 }
  80         }
  81 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
  82         if (argc == 2) {
  83                 offset = simple_strtol(argv[1], NULL, 16);
  84         }
  85 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
  86
  87         printf("## Ready for S-Record download ...\n");
  88
  89         addr = load_serial(offset);
  90
  91         /*
  92          * Gather any trailing characters (for instance, the ^D which
  93          * is sent by 'cu' after sending a file), and give the
  94          * box some time (100 * 1 ms)
  95          */
  96         for (i=0; i<100; ++i) {
  97                 if (tstc()) {
  98                         (void) getc();
  99                 }
 100                 udelay(1000);
 101         }
 102
 103         if (addr == ~0) {
 104                 printf("## S-Record download aborted\n");
 105                 rcode = 1;
 106         } else {
 107                 printf("## Start Addr      = 0x%08lX\n", addr);
 108                 load_addr = addr;
 109         }
 110
 111 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
 112         if (load_baudrate != current_baudrate) {
 113                 printf("## Switch baudrate to %d bps and press ESC ...\n",
 114                         current_baudrate);
 115                 udelay(50000);
 116                 gd->baudrate = current_baudrate;
 117                 serial_setbrg();
 118                 udelay(50000);
 119                 for (;;) {
 120                         if (getc() == 0x1B) /* ESC */
 121                                 break;
 122                 }
 123         }
 124 #endif
 125         return rcode;
 126 }
 127
 128 static ulong load_serial(long offset)
 129 {
 130         char    record[SREC_MAXRECLEN + 1];     /* buffer for one S-Record      */
 131         char    binbuf[SREC_MAXBINLEN];         /* buffer for binary data       */
 132         int     binlen;                         /* no. of data bytes in S-Rec.  */
 133         int     type;                           /* return code for record type  */
 134         ulong   addr;                           /* load address from S-Record   */
 135         ulong   size;                           /* number of bytes transferred  */
 136         ulong   store_addr;
 137         ulong   start_addr = ~0;
 138         ulong   end_addr   =  0;
 139         int     line_count =  0;
 140
 141         while (read_record(record, SREC_MAXRECLEN + 1) >= 0) {
 142                 type = srec_decode(record, &binlen, &addr, binbuf);
 143
 144                 if (type < 0) {
 145                         return (~0);            /* Invalid S-Record             */
 146                 }
 147
 148                 switch (type) {
 149                 case SREC_DATA2:
 150                 case SREC_DATA3:
 151                 case SREC_DATA4:
 152                     store_addr = addr + offset;
 153 #ifndef CONFIG_SYS_NO_FLASH
 154                     if (addr2info(store_addr)) {
 155                         int rc;
 156
 157                         rc = flash_write((char *)binbuf,store_addr,binlen);
 158                         if (rc != 0) {
 159                                 flash_perror(rc);
 160                                 return (~0);
 161                         }
 162                     } else
 163 #endif
 164                     {
 165                         memcpy((char *)(store_addr), binbuf, binlen);
 166                     }
 167                     if ((store_addr) < start_addr)
 168                         start_addr = store_addr;
 169                     if ((store_addr + binlen - 1) > end_addr)
 170                         end_addr = store_addr + binlen - 1;
 171                     break;
 172                 case SREC_END2:
 173                 case SREC_END3:
 174                 case SREC_END4:
 175                     udelay(10000);
 176                     size = end_addr - start_addr + 1;
 177                     printf("\n"
 178                             "## First Load Addr = 0x%08lX\n"
 179                             "## Last  Load Addr = 0x%08lX\n"
 180                             "## Total Size      = 0x%08lX = %ld Bytes\n",
 181                             start_addr, end_addr, size, size
 182                     );
 183                     flush_cache(start_addr, size);
 184                     setenv_hex("filesize", size);
 185                     return (addr);
 186                 case SREC_START:
 187                     break;
 188                 default:
 189                     break;
 190                 }
 191                 if (!do_echo) { /* print a '.' every 100 lines */
 192                         if ((++line_count % 100) == 0)
 193                                 putc('.');
 194                 }
 195         }
 196
 197         return (~0);                    /* Download aborted             */
 198 }
 199
 200 static int read_record(char *buf, ulong len)
 201 {
 202         char *p;
 203         char c;
 204
 205         --len;  /* always leave room for terminating '\0' byte */
 206
 207         for (p=buf; p < buf+len; ++p) {
 208                 c = getc();             /* read character               */
 209                 if (do_echo)
 210                         putc(c);        /* ... and echo it              */
 211
 212                 switch (c) {
 213                 case '\r':
 214                 case '\n':
 215                         *p = '\0';
 216                         return (p - buf);
 217                 case '\0':
 218                 case 0x03:                      /* ^C - Control C               */
 219                         return (-1);
 220                 default:
 221                         *p = c;
 222                 }
 223
 224             /* Check for the console hangup (if any different from serial) */
 225             if (gd->jt[XF_getc] != getc) {
 226                 if (ctrlc()) {
 227                     return (-1);
 228                 }
 229             }
 230         }
 231
 232         /* line too long - truncate */
 233         *p = '\0';
 234         return (p - buf);
 235 }
 236
 237 #if defined(CONFIG_CMD_SAVES)
 238
 239 int do_save_serial (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 240 {
 241         ulong offset = 0;
 242         ulong size   = 0;
 243 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
 244         int save_baudrate, current_baudrate;
 245
 246         save_baudrate = current_baudrate = gd->baudrate;
 247 #endif
 248
 249         if (argc >= 2) {
 250                 offset = simple_strtoul(argv[1], NULL, 16);
 251         }
 252 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
 253         if (argc >= 3) {
 254                 size = simple_strtoul(argv[2], NULL, 16);
 255         }
 256         if (argc == 4) {
 257                 save_baudrate = (int)simple_strtoul(argv[3], NULL, 10);
 258
 259                 /* default to current baudrate */
 260                 if (save_baudrate == 0)
 261                         save_baudrate = current_baudrate;
 262         }
 263         if (save_baudrate != current_baudrate) {
 264                 printf("## Switch baudrate to %d bps and press ENTER ...\n",
 265                         save_baudrate);
 266                 udelay(50000);
 267                 gd->baudrate = save_baudrate;
 268                 serial_setbrg();
 269                 udelay(50000);
 270                 for (;;) {
 271                         if (getc() == '\r')
 272                                 break;
 273                 }
 274         }
 275 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
 276         if (argc == 3) {
 277                 size = simple_strtoul(argv[2], NULL, 16);
 278         }
 279 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
 280
 281         printf("## Ready for S-Record upload, press ENTER to proceed ...\n");
 282         for (;;) {
 283                 if (getc() == '\r')
 284                         break;
 285         }
 286         if (save_serial(offset, size)) {
 287                 printf("## S-Record upload aborted\n");
 288         } else {
 289                 printf("## S-Record upload complete\n");
 290         }
 291 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
 292         if (save_baudrate != current_baudrate) {
 293                 printf("## Switch baudrate to %d bps and press ESC ...\n",
 294                         (int)current_baudrate);
 295                 udelay(50000);
 296                 gd->baudrate = current_baudrate;
 297                 serial_setbrg();
 298                 udelay(50000);
 299                 for (;;) {
 300                         if (getc() == 0x1B) /* ESC */
 301                                 break;
 302                 }
 303         }
 304 #endif
 305         return 0;
 306 }
 307
 308 #define SREC3_START                             "S0030000FC\n"
 309 #define SREC3_FORMAT                    "S3%02X%08lX%s%02X\n"
 310 #define SREC3_END                               "S70500000000FA\n"
 311 #define SREC_BYTES_PER_RECORD   16
 312
 313 static int save_serial(ulong address, ulong count)
 314 {
 315         int i, c, reclen, checksum, length;
 316         char *hex = "0123456789ABCDEF";
 317         char    record[2*SREC_BYTES_PER_RECORD+16];     /* buffer for one S-Record      */
 318         char    data[2*SREC_BYTES_PER_RECORD+1];        /* buffer for hex data  */
 319
 320         reclen = 0;
 321         checksum  = 0;
 322
 323         if(write_record(SREC3_START))                   /* write the header */
 324                 return (-1);
 325         do {
 326                 if(count) {                                             /* collect hex data in the buffer  */
 327                         c = *(volatile uchar*)(address + reclen);       /* get one byte    */
 328                         checksum += c;                                                  /* accumulate checksum */
 329                         data[2*reclen]   = hex[(c>>4)&0x0f];
 330                         data[2*reclen+1] = hex[c & 0x0f];
 331                         data[2*reclen+2] = '\0';
 332                         ++reclen;
 333                         --count;
 334                 }
 335                 if(reclen == SREC_BYTES_PER_RECORD || count == 0) {
 336                         /* enough data collected for one record: dump it */
 337                         if(reclen) {    /* build & write a data record: */
 338                                 /* address + data + checksum */
 339                                 length = 4 + reclen + 1;
 340
 341                                 /* accumulate length bytes into checksum */
 342                                 for(i = 0; i < 2; i++)
 343                                         checksum += (length >> (8*i)) & 0xff;
 344
 345                                 /* accumulate address bytes into checksum: */
 346                                 for(i = 0; i < 4; i++)
 347                                         checksum += (address >> (8*i)) & 0xff;
 348
 349                                 /* make proper checksum byte: */
 350                                 checksum = ~checksum & 0xff;
 351
 352                                 /* output one record: */
 353                                 sprintf(record, SREC3_FORMAT, length, address, data, checksum);
 354                                 if(write_record(record))
 355                                         return (-1);
 356                         }
 357                         address  += reclen;  /* increment address */
 358                         checksum  = 0;
 359                         reclen    = 0;
 360                 }
 361         }
 362         while(count);
 363         if(write_record(SREC3_END))     /* write the final record */
 364                 return (-1);
 365         return(0);
 366 }
 367
 368 static int write_record(char *buf)
 369 {
 370         char c;
 371
 372         while((c = *buf++))
 373                 putc(c);
 374
 375         /* Check for the console hangup (if any different from serial) */
 376
 377         if (ctrlc()) {
 378             return (-1);
 379         }
 380         return (0);
 381 }
 382 # endif
 383
 384 #endif
 385
 386
 387 #if defined(CONFIG_CMD_LOADB)
 388 /*
 389  * loadb command (load binary) included
 390  */
 391 #define XON_CHAR        17
 392 #define XOFF_CHAR       19
 393 #define START_CHAR      0x01
 394 #define ETX_CHAR        0x03
 395 #define END_CHAR        0x0D
 396 #define SPACE           0x20
 397 #define K_ESCAPE        0x23
 398 #define SEND_TYPE       'S'
 399 #define DATA_TYPE       'D'
 400 #define ACK_TYPE        'Y'
 401 #define NACK_TYPE       'N'
 402 #define BREAK_TYPE      'B'
 403 #define tochar(x) ((char) (((x) + SPACE) & 0xff))
 404 #define untochar(x) ((int) (((x) - SPACE) & 0xff))
 405
 406 static void set_kerm_bin_mode(unsigned long *);
 407 static int k_recv(void);
 408 static ulong load_serial_bin(ulong offset);
 409
 410
 411 static char his_eol;        /* character he needs at end of packet */
 412 static int  his_pad_count;  /* number of pad chars he needs */
 413 static char his_pad_char;   /* pad chars he needs */
 414 static char his_quote;      /* quote chars he'll use */
 415
 416 static int do_load_serial_bin(cmd_tbl_t *cmdtp, int flag, int argc,
 417                               char * const argv[])
 418 {
 419         ulong offset = 0;
 420         ulong addr;
 421         int load_baudrate, current_baudrate;
 422         int rcode = 0;
 423         char *s;
 424
 425         /* pre-set offset from CONFIG_SYS_LOAD_ADDR */
 426         offset = CONFIG_SYS_LOAD_ADDR;
 427
 428         /* pre-set offset from $loadaddr */
 429         if ((s = getenv("loadaddr")) != NULL) {
 430                 offset = simple_strtoul(s, NULL, 16);
 431         }
 432
 433         load_baudrate = current_baudrate = gd->baudrate;
 434
 435         if (argc >= 2) {
 436                 offset = simple_strtoul(argv[1], NULL, 16);
 437         }
 438         if (argc == 3) {
 439                 load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
 440
 441                 /* default to current baudrate */
 442                 if (load_baudrate == 0)
 443                         load_baudrate = current_baudrate;
 444         }
 445
 446         if (load_baudrate != current_baudrate) {
 447                 printf("## Switch baudrate to %d bps and press ENTER ...\n",
 448                         load_baudrate);
 449                 udelay(50000);
 450                 gd->baudrate = load_baudrate;
 451                 serial_setbrg();
 452                 udelay(50000);
 453                 for (;;) {
 454                         if (getc() == '\r')
 455                                 break;
 456                 }
 457         }
 458
 459         if (strcmp(argv[0],"loady")==0) {
 460                 printf("## Ready for binary (ymodem) download "
 461                         "to 0x%08lX at %d bps...\n",
 462                         offset,
 463                         load_baudrate);
 464
 465                 addr = load_serial_ymodem(offset);
 466
 467         } else {
 468
 469                 printf("## Ready for binary (kermit) download "
 470                         "to 0x%08lX at %d bps...\n",
 471                         offset,
 472                         load_baudrate);
 473                 addr = load_serial_bin(offset);
 474
 475                 if (addr == ~0) {
 476                         load_addr = 0;
 477                         printf("## Binary (kermit) download aborted\n");
 478                         rcode = 1;
 479                 } else {
 480                         printf("## Start Addr      = 0x%08lX\n", addr);
 481                         load_addr = addr;
 482                 }
 483         }
 484         if (load_baudrate != current_baudrate) {
 485                 printf("## Switch baudrate to %d bps and press ESC ...\n",
 486                         current_baudrate);
 487                 udelay(50000);
 488                 gd->baudrate = current_baudrate;
 489                 serial_setbrg();
 490                 udelay(50000);
 491                 for (;;) {
 492                         if (getc() == 0x1B) /* ESC */
 493                                 break;
 494                 }
 495         }
 496
 497         return rcode;
 498 }
 499
 500
 501 static ulong load_serial_bin(ulong offset)
 502 {
 503         int size, i;
 504
 505         set_kerm_bin_mode((ulong *) offset);
 506         size = k_recv();
 507
 508         /*
 509          * Gather any trailing characters (for instance, the ^D which
 510          * is sent by 'cu' after sending a file), and give the
 511          * box some time (100 * 1 ms)
 512          */
 513         for (i=0; i<100; ++i) {
 514                 if (tstc()) {
 515                         (void) getc();
 516                 }
 517                 udelay(1000);
 518         }
 519
 520         flush_cache(offset, size);
 521
 522         printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
 523         setenv_hex("filesize", size);
 524
 525         return offset;
 526 }
 527
 528 static void send_pad(void)
 529 {
 530         int count = his_pad_count;
 531
 532         while (count-- > 0)
 533                 putc(his_pad_char);
 534 }
 535
 536 /* converts escaped kermit char to binary char */
 537 static char ktrans(char in)
 538 {
 539         if ((in & 0x60) == 0x40) {
 540                 return (char) (in & ~0x40);
 541         } else if ((in & 0x7f) == 0x3f) {
 542                 return (char) (in | 0x40);
 543         } else
 544                 return in;
 545 }
 546
 547 static int chk1(char *buffer)
 548 {
 549         int total = 0;
 550
 551         while (*buffer) {
 552                 total += *buffer++;
 553         }
 554         return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
 555 }
 556
 557 static void s1_sendpacket(char *packet)
 558 {
 559         send_pad();
 560         while (*packet) {
 561                 putc(*packet++);
 562         }
 563 }
 564
 565 static char a_b[24];
 566 static void send_ack(int n)
 567 {
 568         a_b[0] = START_CHAR;
 569         a_b[1] = tochar(3);
 570         a_b[2] = tochar(n);
 571         a_b[3] = ACK_TYPE;
 572         a_b[4] = '\0';
 573         a_b[4] = tochar(chk1(&a_b[1]));
 574         a_b[5] = his_eol;
 575         a_b[6] = '\0';
 576         s1_sendpacket(a_b);
 577 }
 578
 579 static void send_nack(int n)
 580 {
 581         a_b[0] = START_CHAR;
 582         a_b[1] = tochar(3);
 583         a_b[2] = tochar(n);
 584         a_b[3] = NACK_TYPE;
 585         a_b[4] = '\0';
 586         a_b[4] = tochar(chk1(&a_b[1]));
 587         a_b[5] = his_eol;
 588         a_b[6] = '\0';
 589         s1_sendpacket(a_b);
 590 }
 591
 592
 593 static void (*os_data_init)(void);
 594 static void (*os_data_char)(char new_char);
 595 static int os_data_state, os_data_state_saved;
 596 static char *os_data_addr, *os_data_addr_saved;
 597 static char *bin_start_address;
 598
 599 static void bin_data_init(void)
 600 {
 601         os_data_state = 0;
 602         os_data_addr = bin_start_address;
 603 }
 604
 605 static void os_data_save(void)
 606 {
 607         os_data_state_saved = os_data_state;
 608         os_data_addr_saved = os_data_addr;
 609 }
 610
 611 static void os_data_restore(void)
 612 {
 613         os_data_state = os_data_state_saved;
 614         os_data_addr = os_data_addr_saved;
 615 }
 616
 617 static void bin_data_char(char new_char)
 618 {
 619         switch (os_data_state) {
 620         case 0:                                 /* data */
 621                 *os_data_addr++ = new_char;
 622                 break;
 623         }
 624 }
 625
 626 static void set_kerm_bin_mode(unsigned long *addr)
 627 {
 628         bin_start_address = (char *) addr;
 629         os_data_init = bin_data_init;
 630         os_data_char = bin_data_char;
 631 }
 632
 633
 634 /* k_data_* simply handles the kermit escape translations */
 635 static int k_data_escape, k_data_escape_saved;
 636 static void k_data_init(void)
 637 {
 638         k_data_escape = 0;
 639         os_data_init();
 640 }
 641
 642 static void k_data_save(void)
 643 {
 644         k_data_escape_saved = k_data_escape;
 645         os_data_save();
 646 }
 647
 648 static void k_data_restore(void)
 649 {
 650         k_data_escape = k_data_escape_saved;
 651         os_data_restore();
 652 }
 653
 654 static void k_data_char(char new_char)
 655 {
 656         if (k_data_escape) {
 657                 /* last char was escape - translate this character */
 658                 os_data_char(ktrans(new_char));
 659                 k_data_escape = 0;
 660         } else {
 661                 if (new_char == his_quote) {
 662                         /* this char is escape - remember */
 663                         k_data_escape = 1;
 664                 } else {
 665                         /* otherwise send this char as-is */
 666                         os_data_char(new_char);
 667                 }
 668         }
 669 }
 670
 671 #define SEND_DATA_SIZE  20
 672 static char send_parms[SEND_DATA_SIZE];
 673 static char *send_ptr;
 674
 675 /* handle_send_packet interprits the protocol info and builds and
 676    sends an appropriate ack for what we can do */
 677 static void handle_send_packet(int n)
 678 {
 679         int length = 3;
 680         int bytes;
 681
 682         /* initialize some protocol parameters */
 683         his_eol = END_CHAR;             /* default end of line character */
 684         his_pad_count = 0;
 685         his_pad_char = '\0';
 686         his_quote = K_ESCAPE;
 687
 688         /* ignore last character if it filled the buffer */
 689         if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
 690                 --send_ptr;
 691         bytes = send_ptr - send_parms;  /* how many bytes we'll process */
 692         do {
 693                 if (bytes-- <= 0)
 694                         break;
 695                 /* handle MAXL - max length */
 696                 /* ignore what he says - most I'll take (here) is 94 */
 697                 a_b[++length] = tochar(94);
 698                 if (bytes-- <= 0)
 699                         break;
 700                 /* handle TIME - time you should wait for my packets */
 701                 /* ignore what he says - don't wait for my ack longer than 1 second */
 702                 a_b[++length] = tochar(1);
 703                 if (bytes-- <= 0)
 704                         break;
 705                 /* handle NPAD - number of pad chars I need */
 706                 /* remember what he says - I need none */
 707                 his_pad_count = untochar(send_parms[2]);
 708                 a_b[++length] = tochar(0);
 709                 if (bytes-- <= 0)
 710                         break;
 711                 /* handle PADC - pad chars I need */
 712                 /* remember what he says - I need none */
 713                 his_pad_char = ktrans(send_parms[3]);
 714                 a_b[++length] = 0x40;   /* He should ignore this */
 715                 if (bytes-- <= 0)
 716                         break;
 717                 /* handle EOL - end of line he needs */
 718                 /* remember what he says - I need CR */
 719                 his_eol = untochar(send_parms[4]);
 720                 a_b[++length] = tochar(END_CHAR);
 721                 if (bytes-- <= 0)
 722                         break;
 723                 /* handle QCTL - quote control char he'll use */
 724                 /* remember what he says - I'll use '#' */
 725                 his_quote = send_parms[5];
 726                 a_b[++length] = '#';
 727                 if (bytes-- <= 0)
 728                         break;
 729                 /* handle QBIN - 8-th bit prefixing */
 730                 /* ignore what he says - I refuse */
 731                 a_b[++length] = 'N';
 732                 if (bytes-- <= 0)
 733                         break;
 734                 /* handle CHKT - the clock check type */
 735                 /* ignore what he says - I do type 1 (for now) */
 736                 a_b[++length] = '1';
 737                 if (bytes-- <= 0)
 738                         break;
 739                 /* handle REPT - the repeat prefix */
 740                 /* ignore what he says - I refuse (for now) */
 741                 a_b[++length] = 'N';
 742                 if (bytes-- <= 0)
 743                         break;
 744                 /* handle CAPAS - the capabilities mask */
 745                 /* ignore what he says - I only do long packets - I don't do windows */
 746                 a_b[++length] = tochar(2);      /* only long packets */
 747                 a_b[++length] = tochar(0);      /* no windows */
 748                 a_b[++length] = tochar(94);     /* large packet msb */
 749                 a_b[++length] = tochar(94);     /* large packet lsb */
 750         } while (0);
 751
 752         a_b[0] = START_CHAR;
 753         a_b[1] = tochar(length);
 754         a_b[2] = tochar(n);
 755         a_b[3] = ACK_TYPE;
 756         a_b[++length] = '\0';
 757         a_b[length] = tochar(chk1(&a_b[1]));
 758         a_b[++length] = his_eol;
 759         a_b[++length] = '\0';
 760         s1_sendpacket(a_b);
 761 }
 762
 763 /* k_recv receives a OS Open image file over kermit line */
 764 static int k_recv(void)
 765 {
 766         char new_char;
 767         char k_state, k_state_saved;
 768         int sum;
 769         int done;
 770         int length;
 771         int n, last_n;
 772         int len_lo, len_hi;
 773
 774         /* initialize some protocol parameters */
 775         his_eol = END_CHAR;             /* default end of line character */
 776         his_pad_count = 0;
 777         his_pad_char = '\0';
 778         his_quote = K_ESCAPE;
 779
 780         /* initialize the k_recv and k_data state machine */
 781         done = 0;
 782         k_state = 0;
 783         k_data_init();
 784         k_state_saved = k_state;
 785         k_data_save();
 786         n = 0;                          /* just to get rid of a warning */
 787         last_n = -1;
 788
 789         /* expect this "type" sequence (but don't check):
 790            S: send initiate
 791            F: file header
 792            D: data (multiple)
 793            Z: end of file
 794            B: break transmission
 795          */
 796
 797         /* enter main loop */
 798         while (!done) {
 799                 /* set the send packet pointer to begining of send packet parms */
 800                 send_ptr = send_parms;
 801
 802                 /* With each packet, start summing the bytes starting with the length.
 803                    Save the current sequence number.
 804                    Note the type of the packet.
 805                    If a character less than SPACE (0x20) is received - error.
 806                  */
 807
 808 #if 0
 809                 /* OLD CODE, Prior to checking sequence numbers */
 810                 /* first have all state machines save current states */
 811                 k_state_saved = k_state;
 812                 k_data_save ();
 813 #endif
 814
 815                 /* get a packet */
 816                 /* wait for the starting character or ^C */
 817                 for (;;) {
 818                         switch (getc ()) {
 819                         case START_CHAR:        /* start packet */
 820                                 goto START;
 821                         case ETX_CHAR:          /* ^C waiting for packet */
 822                                 return (0);
 823                         default:
 824                                 ;
 825                         }
 826                 }
 827 START:
 828                 /* get length of packet */
 829                 sum = 0;
 830                 new_char = getc();
 831                 if ((new_char & 0xE0) == 0)
 832                         goto packet_error;
 833                 sum += new_char & 0xff;
 834                 length = untochar(new_char);
 835                 /* get sequence number */
 836                 new_char = getc();
 837                 if ((new_char & 0xE0) == 0)
 838                         goto packet_error;
 839                 sum += new_char & 0xff;
 840                 n = untochar(new_char);
 841                 --length;
 842
 843                 /* NEW CODE - check sequence numbers for retried packets */
 844                 /* Note - this new code assumes that the sequence number is correctly
 845                  * received.  Handling an invalid sequence number adds another layer
 846                  * of complexity that may not be needed - yet!  At this time, I'm hoping
 847                  * that I don't need to buffer the incoming data packets and can write
 848                  * the data into memory in real time.
 849                  */
 850                 if (n == last_n) {
 851                         /* same sequence number, restore the previous state */
 852                         k_state = k_state_saved;
 853                         k_data_restore();
 854                 } else {
 855                         /* new sequence number, checkpoint the download */
 856                         last_n = n;
 857                         k_state_saved = k_state;
 858                         k_data_save();
 859                 }
 860                 /* END NEW CODE */
 861
 862                 /* get packet type */
 863                 new_char = getc();
 864                 if ((new_char & 0xE0) == 0)
 865                         goto packet_error;
 866                 sum += new_char & 0xff;
 867                 k_state = new_char;
 868                 --length;
 869                 /* check for extended length */
 870                 if (length == -2) {
 871                         /* (length byte was 0, decremented twice) */
 872                         /* get the two length bytes */
 873                         new_char = getc();
 874                         if ((new_char & 0xE0) == 0)
 875                                 goto packet_error;
 876                         sum += new_char & 0xff;
 877                         len_hi = untochar(new_char);
 878                         new_char = getc();
 879                         if ((new_char & 0xE0) == 0)
 880                                 goto packet_error;
 881                         sum += new_char & 0xff;
 882                         len_lo = untochar(new_char);
 883                         length = len_hi * 95 + len_lo;
 884                         /* check header checksum */
 885                         new_char = getc();
 886                         if ((new_char & 0xE0) == 0)
 887                                 goto packet_error;
 888                         if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
 889                                 goto packet_error;
 890                         sum += new_char & 0xff;
 891 /* --length; */ /* new length includes only data and block check to come */
 892                 }
 893                 /* bring in rest of packet */
 894                 while (length > 1) {
 895                         new_char = getc();
 896                         if ((new_char & 0xE0) == 0)
 897                                 goto packet_error;
 898                         sum += new_char & 0xff;
 899                         --length;
 900                         if (k_state == DATA_TYPE) {
 901                                 /* pass on the data if this is a data packet */
 902                                 k_data_char (new_char);
 903                         } else if (k_state == SEND_TYPE) {
 904                                 /* save send pack in buffer as is */
 905                                 *send_ptr++ = new_char;
 906                                 /* if too much data, back off the pointer */
 907                                 if (send_ptr >= &send_parms[SEND_DATA_SIZE])
 908                                         --send_ptr;
 909                         }
 910                 }
 911                 /* get and validate checksum character */
 912                 new_char = getc();
 913                 if ((new_char & 0xE0) == 0)
 914                         goto packet_error;
 915                 if (new_char != tochar((sum + ((sum >> 6) & 0x03)) & 0x3f))
 916                         goto packet_error;
 917                 /* get END_CHAR */
 918                 new_char = getc();
 919                 if (new_char != END_CHAR) {
 920                   packet_error:
 921                         /* restore state machines */
 922                         k_state = k_state_saved;
 923                         k_data_restore();
 924                         /* send a negative acknowledge packet in */
 925                         send_nack(n);
 926                 } else if (k_state == SEND_TYPE) {
 927                         /* crack the protocol parms, build an appropriate ack packet */
 928                         handle_send_packet(n);
 929                 } else {
 930                         /* send simple acknowledge packet in */
 931                         send_ack(n);
 932                         /* quit if end of transmission */
 933                         if (k_state == BREAK_TYPE)
 934                                 done = 1;
 935                 }
 936         }
 937         return ((ulong) os_data_addr - (ulong) bin_start_address);
 938 }
 939
 940 static int getcxmodem(void) {
 941         if (tstc())
 942                 return (getc());
 943         return -1;
 944 }
 945 static ulong load_serial_ymodem(ulong offset)
 946 {
 947         int size;
 948         int err;
 949         int res;
 950         connection_info_t info;
 951         char ymodemBuf[1024];
 952         ulong store_addr = ~0;
 953         ulong addr = 0;
 954
 955         size = 0;
 956         info.mode = xyzModem_ymodem;
 957         res = xyzModem_stream_open(&info, &err);
 958         if (!res) {
 959
 960                 while ((res =
 961                         xyzModem_stream_read(ymodemBuf, 1024, &err)) > 0) {
 962                         store_addr = addr + offset;
 963                         size += res;
 964                         addr += res;
 965 #ifndef CONFIG_SYS_NO_FLASH
 966                         if (addr2info(store_addr)) {
 967                                 int rc;
 968
 969                                 rc = flash_write((char *) ymodemBuf,
 970                                                   store_addr, res);
 971                                 if (rc != 0) {
 972                                         flash_perror (rc);
 973                                         return (~0);
 974                                 }
 975                         } else
 976 #endif
 977                         {
 978                                 memcpy((char *)(store_addr), ymodemBuf,
 979                                         res);
 980                         }
 981
 982                 }
 983         } else {
 984                 printf("%s\n", xyzModem_error(err));
 985         }
 986
 987         xyzModem_stream_close(&err);
 988         xyzModem_stream_terminate(false, &getcxmodem);
 989
 990
 991         flush_cache(offset, size);
 992
 993         printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
 994         setenv_hex("filesize", size);
 995
 996         return offset;
 997 }
 998
 999 #endif
1000
1001 /* -------------------------------------------------------------------- */
1002
1003 #if defined(CONFIG_CMD_LOADS)
1004
1005 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
1006 U_BOOT_CMD(
1007         loads, 3, 0,    do_load_serial,
1008         "load S-Record file over serial line",
1009         "[ off ] [ baud ]\n"
1010         "    - load S-Record file over serial line"
1011         " with offset 'off' and baudrate 'baud'"
1012 );
1013
1014 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1015 U_BOOT_CMD(
1016         loads, 2, 0,    do_load_serial,
1017         "load S-Record file over serial line",
1018         "[ off ]\n"
1019         "    - load S-Record file over serial line with offset 'off'"
1020 );
1021 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1022
1023 /*
1024  * SAVES always requires LOADS support, but not vice versa
1025  */
1026
1027
1028 #if defined(CONFIG_CMD_SAVES)
1029 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
1030 U_BOOT_CMD(
1031         saves, 4, 0,    do_save_serial,
1032         "save S-Record file over serial line",
1033         "[ off ] [size] [ baud ]\n"
1034         "    - save S-Record file over serial line"
1035         " with offset 'off', size 'size' and baudrate 'baud'"
1036 );
1037 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1038 U_BOOT_CMD(
1039         saves, 3, 0,    do_save_serial,
1040         "save S-Record file over serial line",
1041         "[ off ] [size]\n"
1042         "    - save S-Record file over serial line with offset 'off' and size 'size'"
1043 );
1044 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1045 #endif  /* CONFIG_CMD_SAVES */
1046 #endif  /* CONFIG_CMD_LOADS */
1047
1048
1049 #if defined(CONFIG_CMD_LOADB)
1050 U_BOOT_CMD(
1051         loadb, 3, 0,    do_load_serial_bin,
1052         "load binary file over serial line (kermit mode)",
1053         "[ off ] [ baud ]\n"
1054         "    - load binary file over serial line"
1055         " with offset 'off' and baudrate 'baud'"
1056 );
1057
1058 U_BOOT_CMD(
1059         loady, 3, 0,    do_load_serial_bin,
1060         "load binary file over serial line (ymodem mode)",
1061         "[ off ] [ baud ]\n"
1062         "    - load binary file over serial line"
1063         " with offset 'off' and baudrate 'baud'"
1064 );
1065
1066 #endif  /* CONFIG_CMD_LOADB */
1067
1068 /* -------------------------------------------------------------------- */
1069
1070 #if defined(CONFIG_CMD_HWFLOW)
1071 int do_hwflow(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1072 {
1073         extern int hwflow_onoff(int);
1074
1075         if (argc == 2) {
1076                 if (strcmp(argv[1], "off") == 0)
1077                         hwflow_onoff(-1);
1078                 else
1079                         if (strcmp(argv[1], "on") == 0)
1080                                 hwflow_onoff(1);
1081                         else
1082                                 return CMD_RET_USAGE;
1083         }
1084         printf("RTS/CTS hardware flow control: %s\n", hwflow_onoff(0) ? "on" : "off");
1085         return 0;
1086 }
1087
1088 /* -------------------------------------------------------------------- */
1089
1090 U_BOOT_CMD(
1091         hwflow, 2, 0,   do_hwflow,
1092         "turn RTS/CTS hardware flow control in serial line on/off",
1093         "[on|off]"
1094 );
1095
1096 #endif  /* CONFIG_CMD_HWFLOW */