common/cmd_load.c

   1 /*
   2  * (C) Copyright 2000-2004
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * Serial up- and download support
  26  */
  27 #include <common.h>
  28 #include <command.h>
  29 #include <s_record.h>
  30 #include <net.h>
  31 #include <exports.h>
  32 #include <xyzModem.h>
  33
  34 DECLARE_GLOBAL_DATA_PTR;
  35
  36 #if defined(CONFIG_CMD_LOADB)
  37 static ulong load_serial_ymodem (ulong offset);
  38 #endif
  39
  40 #if defined(CONFIG_CMD_LOADS)
  41 static ulong load_serial (ulong offset);
  42 static int read_record (char *buf, ulong len);
  43 # if defined(CONFIG_CMD_SAVES)
  44 static int save_serial (ulong offset, ulong size);
  45 static int write_record (char *buf);
  46 #endif
  47
  48 static int do_echo = 1;
  49 #endif
  50
  51 /* -------------------------------------------------------------------- */
  52
  53 #if defined(CONFIG_CMD_LOADS)
  54 int do_load_serial (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  55 {
  56         ulong offset = 0;
  57         ulong addr;
  58         int i;
  59         char *env_echo;
  60         int rcode = 0;
  61 #ifdef  CFG_LOADS_BAUD_CHANGE
  62         int load_baudrate, current_baudrate;
  63
  64         load_baudrate = current_baudrate = gd->baudrate;
  65 #endif
  66
  67         if (((env_echo = getenv("loads_echo")) != NULL) && (*env_echo == '1')) {
  68                 do_echo = 1;
  69         } else {
  70                 do_echo = 0;
  71         }
  72
  73 #ifdef  CFG_LOADS_BAUD_CHANGE
  74         if (argc >= 2) {
  75                 offset = simple_strtoul(argv[1], NULL, 16);
  76         }
  77         if (argc == 3) {
  78                 load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
  79
  80                 /* default to current baudrate */
  81                 if (load_baudrate == 0)
  82                         load_baudrate = current_baudrate;
  83         }
  84         if (load_baudrate != current_baudrate) {
  85                 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
  86                         load_baudrate);
  87                 udelay(50000);
  88                 gd->baudrate = load_baudrate;
  89                 serial_setbrg ();
  90                 udelay(50000);
  91                 for (;;) {
  92                         if (getc() == '\r')
  93                                 break;
  94                 }
  95         }
  96 #else   /* ! CFG_LOADS_BAUD_CHANGE */
  97         if (argc == 2) {
  98                 offset = simple_strtoul(argv[1], NULL, 16);
  99         }
 100 #endif  /* CFG_LOADS_BAUD_CHANGE */
 101
 102         printf ("## Ready for S-Record download ...\n");
 103
 104         addr = load_serial (offset);
 105
 106         /*
 107          * Gather any trailing characters (for instance, the ^D which
 108          * is sent by 'cu' after sending a file), and give the
 109          * box some time (100 * 1 ms)
 110          */
 111         for (i=0; i<100; ++i) {
 112                 if (tstc()) {
 113                         (void) getc();
 114                 }
 115                 udelay(1000);
 116         }
 117
 118         if (addr == ~0) {
 119                 printf ("## S-Record download aborted\n");
 120                 rcode = 1;
 121         } else {
 122                 printf ("## Start Addr      = 0x%08lX\n", addr);
 123                 load_addr = addr;
 124         }
 125
 126 #ifdef  CFG_LOADS_BAUD_CHANGE
 127         if (load_baudrate != current_baudrate) {
 128                 printf ("## Switch baudrate to %d bps and press ESC ...\n",
 129                         current_baudrate);
 130                 udelay (50000);
 131                 gd->baudrate = current_baudrate;
 132                 serial_setbrg ();
 133                 udelay (50000);
 134                 for (;;) {
 135                         if (getc() == 0x1B) /* ESC */
 136                                 break;
 137                 }
 138         }
 139 #endif
 140         return rcode;
 141 }
 142
 143 static ulong
 144 load_serial (ulong offset)
 145 {
 146         char    record[SREC_MAXRECLEN + 1];     /* buffer for one S-Record      */
 147         char    binbuf[SREC_MAXBINLEN];         /* buffer for binary data       */
 148         int     binlen;                         /* no. of data bytes in S-Rec.  */
 149         int     type;                           /* return code for record type  */
 150         ulong   addr;                           /* load address from S-Record   */
 151         ulong   size;                           /* number of bytes transferred  */
 152         char    buf[32];
 153         ulong   store_addr;
 154         ulong   start_addr = ~0;
 155         ulong   end_addr   =  0;
 156         int     line_count =  0;
 157
 158         while (read_record(record, SREC_MAXRECLEN + 1) >= 0) {
 159                 type = srec_decode (record, &binlen, &addr, binbuf);
 160
 161                 if (type < 0) {
 162                         return (~0);            /* Invalid S-Record             */
 163                 }
 164
 165                 switch (type) {
 166                 case SREC_DATA2:
 167                 case SREC_DATA3:
 168                 case SREC_DATA4:
 169                     store_addr = addr + offset;
 170 #ifndef CFG_NO_FLASH
 171                     if (addr2info(store_addr)) {
 172                         int rc;
 173
 174                         rc = flash_write((char *)binbuf,store_addr,binlen);
 175                         if (rc != 0) {
 176                                 flash_perror (rc);
 177                                 return (~0);
 178                         }
 179                     } else
 180 #endif
 181                     {
 182                         memcpy ((char *)(store_addr), binbuf, binlen);
 183                     }
 184                     if ((store_addr) < start_addr)
 185                         start_addr = store_addr;
 186                     if ((store_addr + binlen - 1) > end_addr)
 187                         end_addr = store_addr + binlen - 1;
 188                     break;
 189                 case SREC_END2:
 190                 case SREC_END3:
 191                 case SREC_END4:
 192                     udelay (10000);
 193                     size = end_addr - start_addr + 1;
 194                     printf ("\n"
 195                             "## First Load Addr = 0x%08lX\n"
 196                             "## Last  Load Addr = 0x%08lX\n"
 197                             "## Total Size      = 0x%08lX = %ld Bytes\n",
 198                             start_addr, end_addr, size, size
 199                     );
 200                     flush_cache (start_addr, size);
 201                     sprintf(buf, "%lX", size);
 202                     setenv("filesize", buf);
 203                     return (addr);
 204                 case SREC_START:
 205                     break;
 206                 default:
 207                     break;
 208                 }
 209                 if (!do_echo) { /* print a '.' every 100 lines */
 210                         if ((++line_count % 100) == 0)
 211                                 putc ('.');
 212                 }
 213         }
 214
 215         return (~0);                    /* Download aborted             */
 216 }
 217
 218 static int
 219 read_record (char *buf, ulong len)
 220 {
 221         char *p;
 222         char c;
 223
 224         --len;  /* always leave room for terminating '\0' byte */
 225
 226         for (p=buf; p < buf+len; ++p) {
 227                 c = getc();             /* read character               */
 228                 if (do_echo)
 229                         putc (c);       /* ... and echo it              */
 230
 231                 switch (c) {
 232                 case '\r':
 233                 case '\n':
 234                         *p = '\0';
 235                         return (p - buf);
 236                 case '\0':
 237                 case 0x03:                      /* ^C - Control C               */
 238                         return (-1);
 239                 default:
 240                         *p = c;
 241                 }
 242
 243             /* Check for the console hangup (if any different from serial) */
 244             if (gd->jt[XF_getc] != getc) {
 245                 if (ctrlc()) {
 246                     return (-1);
 247                 }
 248             }
 249         }
 250
 251         /* line too long - truncate */
 252         *p = '\0';
 253         return (p - buf);
 254 }
 255
 256 #if defined(CONFIG_CMD_SAVES)
 257
 258 int do_save_serial (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 259 {
 260         ulong offset = 0;
 261         ulong size   = 0;
 262 #ifdef  CFG_LOADS_BAUD_CHANGE
 263         int save_baudrate, current_baudrate;
 264
 265         save_baudrate = current_baudrate = gd->baudrate;
 266 #endif
 267
 268         if (argc >= 2) {
 269                 offset = simple_strtoul(argv[1], NULL, 16);
 270         }
 271 #ifdef  CFG_LOADS_BAUD_CHANGE
 272         if (argc >= 3) {
 273                 size = simple_strtoul(argv[2], NULL, 16);
 274         }
 275         if (argc == 4) {
 276                 save_baudrate = (int)simple_strtoul(argv[3], NULL, 10);
 277
 278                 /* default to current baudrate */
 279                 if (save_baudrate == 0)
 280                         save_baudrate = current_baudrate;
 281         }
 282         if (save_baudrate != current_baudrate) {
 283                 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
 284                         save_baudrate);
 285                 udelay(50000);
 286                 gd->baudrate = save_baudrate;
 287                 serial_setbrg ();
 288                 udelay(50000);
 289                 for (;;) {
 290                         if (getc() == '\r')
 291                                 break;
 292                 }
 293         }
 294 #else   /* ! CFG_LOADS_BAUD_CHANGE */
 295         if (argc == 3) {
 296                 size = simple_strtoul(argv[2], NULL, 16);
 297         }
 298 #endif  /* CFG_LOADS_BAUD_CHANGE */
 299
 300         printf ("## Ready for S-Record upload, press ENTER to proceed ...\n");
 301         for (;;) {
 302                 if (getc() == '\r')
 303                         break;
 304         }
 305         if(save_serial (offset, size)) {
 306                 printf ("## S-Record upload aborted\n");
 307         } else {
 308                 printf ("## S-Record upload complete\n");
 309         }
 310 #ifdef  CFG_LOADS_BAUD_CHANGE
 311         if (save_baudrate != current_baudrate) {
 312                 printf ("## Switch baudrate to %d bps and press ESC ...\n",
 313                         (int)current_baudrate);
 314                 udelay (50000);
 315                 gd->baudrate = current_baudrate;
 316                 serial_setbrg ();
 317                 udelay (50000);
 318                 for (;;) {
 319                         if (getc() == 0x1B) /* ESC */
 320                                 break;
 321                 }
 322         }
 323 #endif
 324         return 0;
 325 }
 326
 327 #define SREC3_START                             "S0030000FC\n"
 328 #define SREC3_FORMAT                    "S3%02X%08lX%s%02X\n"
 329 #define SREC3_END                               "S70500000000FA\n"
 330 #define SREC_BYTES_PER_RECORD   16
 331
 332 static int save_serial (ulong address, ulong count)
 333 {
 334         int i, c, reclen, checksum, length;
 335         char *hex = "0123456789ABCDEF";
 336         char    record[2*SREC_BYTES_PER_RECORD+16];     /* buffer for one S-Record      */
 337         char    data[2*SREC_BYTES_PER_RECORD+1];        /* buffer for hex data  */
 338
 339         reclen = 0;
 340         checksum  = 0;
 341
 342         if(write_record(SREC3_START))                   /* write the header */
 343                 return (-1);
 344         do {
 345                 if(count) {                                             /* collect hex data in the buffer  */
 346                         c = *(volatile uchar*)(address + reclen);       /* get one byte    */
 347                         checksum += c;                                                  /* accumulate checksum */
 348                         data[2*reclen]   = hex[(c>>4)&0x0f];
 349                         data[2*reclen+1] = hex[c & 0x0f];
 350                         data[2*reclen+2] = '\0';
 351                         ++reclen;
 352                         --count;
 353                 }
 354                 if(reclen == SREC_BYTES_PER_RECORD || count == 0) {
 355                         /* enough data collected for one record: dump it */
 356                         if(reclen) {    /* build & write a data record: */
 357                                 /* address + data + checksum */
 358                                 length = 4 + reclen + 1;
 359
 360                                 /* accumulate length bytes into checksum */
 361                                 for(i = 0; i < 2; i++)
 362                                         checksum += (length >> (8*i)) & 0xff;
 363
 364                                 /* accumulate address bytes into checksum: */
 365                                 for(i = 0; i < 4; i++)
 366                                         checksum += (address >> (8*i)) & 0xff;
 367
 368                                 /* make proper checksum byte: */
 369                                 checksum = ~checksum & 0xff;
 370
 371                                 /* output one record: */
 372                                 sprintf(record, SREC3_FORMAT, length, address, data, checksum);
 373                                 if(write_record(record))
 374                                         return (-1);
 375                         }
 376                         address  += reclen;  /* increment address */
 377                         checksum  = 0;
 378                         reclen    = 0;
 379                 }
 380         }
 381         while(count);
 382         if(write_record(SREC3_END))     /* write the final record */
 383                 return (-1);
 384         return(0);
 385 }
 386
 387 static int
 388 write_record (char *buf)
 389 {
 390         char c;
 391
 392         while((c = *buf++))
 393                 putc(c);
 394
 395         /* Check for the console hangup (if any different from serial) */
 396
 397         if (ctrlc()) {
 398             return (-1);
 399         }
 400         return (0);
 401 }
 402 # endif
 403
 404 #endif
 405
 406
 407 #if defined(CONFIG_CMD_LOADB)
 408 /*
 409  * loadb command (load binary) included
 410  */
 411 #define XON_CHAR        17
 412 #define XOFF_CHAR       19
 413 #define START_CHAR      0x01
 414 #define ETX_CHAR        0x03
 415 #define END_CHAR        0x0D
 416 #define SPACE           0x20
 417 #define K_ESCAPE        0x23
 418 #define SEND_TYPE       'S'
 419 #define DATA_TYPE       'D'
 420 #define ACK_TYPE        'Y'
 421 #define NACK_TYPE       'N'
 422 #define BREAK_TYPE      'B'
 423 #define tochar(x) ((char) (((x) + SPACE) & 0xff))
 424 #define untochar(x) ((int) (((x) - SPACE) & 0xff))
 425
 426 extern int os_data_count;
 427 extern int os_data_header[8];
 428
 429 static void set_kerm_bin_mode(unsigned long *);
 430 static int k_recv(void);
 431 static ulong load_serial_bin (ulong offset);
 432
 433
 434 char his_eol;        /* character he needs at end of packet */
 435 int  his_pad_count;  /* number of pad chars he needs */
 436 char his_pad_char;   /* pad chars he needs */
 437 char his_quote;      /* quote chars he'll use */
 438
 439 int do_load_serial_bin (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 440 {
 441         ulong offset = 0;
 442         ulong addr;
 443         int load_baudrate, current_baudrate;
 444         int rcode = 0;
 445         char *s;
 446
 447         /* pre-set offset from CFG_LOAD_ADDR */
 448         offset = CFG_LOAD_ADDR;
 449
 450         /* pre-set offset from $loadaddr */
 451         if ((s = getenv("loadaddr")) != NULL) {
 452                 offset = simple_strtoul(s, NULL, 16);
 453         }
 454
 455         load_baudrate = current_baudrate = gd->baudrate;
 456
 457         if (argc >= 2) {
 458                 offset = simple_strtoul(argv[1], NULL, 16);
 459         }
 460         if (argc == 3) {
 461                 load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
 462
 463                 /* default to current baudrate */
 464                 if (load_baudrate == 0)
 465                         load_baudrate = current_baudrate;
 466         }
 467
 468         if (load_baudrate != current_baudrate) {
 469                 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
 470                         load_baudrate);
 471                 udelay(50000);
 472                 gd->baudrate = load_baudrate;
 473                 serial_setbrg ();
 474                 udelay(50000);
 475                 for (;;) {
 476                         if (getc() == '\r')
 477                                 break;
 478                 }
 479         }
 480
 481         if (strcmp(argv[0],"loady")==0) {
 482                 printf ("## Ready for binary (ymodem) download "
 483                         "to 0x%08lX at %d bps...\n",
 484                         offset,
 485                         load_baudrate);
 486
 487                 addr = load_serial_ymodem (offset);
 488
 489         } else {
 490
 491                 printf ("## Ready for binary (kermit) download "
 492                         "to 0x%08lX at %d bps...\n",
 493                         offset,
 494                         load_baudrate);
 495                 addr = load_serial_bin (offset);
 496
 497                 if (addr == ~0) {
 498                         load_addr = 0;
 499                         printf ("## Binary (kermit) download aborted\n");
 500                         rcode = 1;
 501                 } else {
 502                         printf ("## Start Addr      = 0x%08lX\n", addr);
 503                         load_addr = addr;
 504                 }
 505         }
 506         if (load_baudrate != current_baudrate) {
 507                 printf ("## Switch baudrate to %d bps and press ESC ...\n",
 508                         current_baudrate);
 509                 udelay (50000);
 510                 gd->baudrate = current_baudrate;
 511                 serial_setbrg ();
 512                 udelay (50000);
 513                 for (;;) {
 514                         if (getc() == 0x1B) /* ESC */
 515                                 break;
 516                 }
 517         }
 518
 519 #ifdef CONFIG_AUTOSCRIPT
 520         if (load_addr) {
 521                 char *s;
 522
 523                 if (((s = getenv("autoscript")) != NULL) && (strcmp(s,"yes") == 0)) {
 524                         printf ("Running autoscript at addr 0x%08lX", load_addr);
 525
 526                         s = getenv ("autoscript_uname");
 527                         if (s)
 528                                 printf (":%s ...\n", s);
 529                         else
 530                                 puts (" ...\n");
 531
 532                         rcode = autoscript (load_addr, s);
 533                 }
 534         }
 535 #endif
 536         return rcode;
 537 }
 538
 539
 540 static ulong load_serial_bin (ulong offset)
 541 {
 542         int size, i;
 543         char buf[32];
 544
 545         set_kerm_bin_mode ((ulong *) offset);
 546         size = k_recv ();
 547
 548         /*
 549          * Gather any trailing characters (for instance, the ^D which
 550          * is sent by 'cu' after sending a file), and give the
 551          * box some time (100 * 1 ms)
 552          */
 553         for (i=0; i<100; ++i) {
 554                 if (tstc()) {
 555                         (void) getc();
 556                 }
 557                 udelay(1000);
 558         }
 559
 560         flush_cache (offset, size);
 561
 562         printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
 563         sprintf(buf, "%X", size);
 564         setenv("filesize", buf);
 565
 566         return offset;
 567 }
 568
 569 void send_pad (void)
 570 {
 571         int count = his_pad_count;
 572
 573         while (count-- > 0)
 574                 putc (his_pad_char);
 575 }
 576
 577 /* converts escaped kermit char to binary char */
 578 char ktrans (char in)
 579 {
 580         if ((in & 0x60) == 0x40) {
 581                 return (char) (in & ~0x40);
 582         } else if ((in & 0x7f) == 0x3f) {
 583                 return (char) (in | 0x40);
 584         } else
 585                 return in;
 586 }
 587
 588 int chk1 (char *buffer)
 589 {
 590         int total = 0;
 591
 592         while (*buffer) {
 593                 total += *buffer++;
 594         }
 595         return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
 596 }
 597
 598 void s1_sendpacket (char *packet)
 599 {
 600         send_pad ();
 601         while (*packet) {
 602                 putc (*packet++);
 603         }
 604 }
 605
 606 static char a_b[24];
 607 void send_ack (int n)
 608 {
 609         a_b[0] = START_CHAR;
 610         a_b[1] = tochar (3);
 611         a_b[2] = tochar (n);
 612         a_b[3] = ACK_TYPE;
 613         a_b[4] = '\0';
 614         a_b[4] = tochar (chk1 (&a_b[1]));
 615         a_b[5] = his_eol;
 616         a_b[6] = '\0';
 617         s1_sendpacket (a_b);
 618 }
 619
 620 void send_nack (int n)
 621 {
 622         a_b[0] = START_CHAR;
 623         a_b[1] = tochar (3);
 624         a_b[2] = tochar (n);
 625         a_b[3] = NACK_TYPE;
 626         a_b[4] = '\0';
 627         a_b[4] = tochar (chk1 (&a_b[1]));
 628         a_b[5] = his_eol;
 629         a_b[6] = '\0';
 630         s1_sendpacket (a_b);
 631 }
 632
 633
 634 /* os_data_* takes an OS Open image and puts it into memory, and
 635    puts the boot header in an array named os_data_header
 636
 637    if image is binary, no header is stored in os_data_header.
 638 */
 639 void (*os_data_init) (void);
 640 void (*os_data_char) (char new_char);
 641 static int os_data_state, os_data_state_saved;
 642 int os_data_count;
 643 static int os_data_count_saved;
 644 static char *os_data_addr, *os_data_addr_saved;
 645 static char *bin_start_address;
 646 int os_data_header[8];
 647 static void bin_data_init (void)
 648 {
 649         os_data_state = 0;
 650         os_data_count = 0;
 651         os_data_addr = bin_start_address;
 652 }
 653 static void os_data_save (void)
 654 {
 655         os_data_state_saved = os_data_state;
 656         os_data_count_saved = os_data_count;
 657         os_data_addr_saved = os_data_addr;
 658 }
 659 static void os_data_restore (void)
 660 {
 661         os_data_state = os_data_state_saved;
 662         os_data_count = os_data_count_saved;
 663         os_data_addr = os_data_addr_saved;
 664 }
 665 static void bin_data_char (char new_char)
 666 {
 667         switch (os_data_state) {
 668         case 0:                                 /* data */
 669                 *os_data_addr++ = new_char;
 670                 --os_data_count;
 671                 break;
 672         }
 673 }
 674 static void set_kerm_bin_mode (unsigned long *addr)
 675 {
 676         bin_start_address = (char *) addr;
 677         os_data_init = bin_data_init;
 678         os_data_char = bin_data_char;
 679 }
 680
 681
 682 /* k_data_* simply handles the kermit escape translations */
 683 static int k_data_escape, k_data_escape_saved;
 684 void k_data_init (void)
 685 {
 686         k_data_escape = 0;
 687         os_data_init ();
 688 }
 689 void k_data_save (void)
 690 {
 691         k_data_escape_saved = k_data_escape;
 692         os_data_save ();
 693 }
 694 void k_data_restore (void)
 695 {
 696         k_data_escape = k_data_escape_saved;
 697         os_data_restore ();
 698 }
 699 void k_data_char (char new_char)
 700 {
 701         if (k_data_escape) {
 702                 /* last char was escape - translate this character */
 703                 os_data_char (ktrans (new_char));
 704                 k_data_escape = 0;
 705         } else {
 706                 if (new_char == his_quote) {
 707                         /* this char is escape - remember */
 708                         k_data_escape = 1;
 709                 } else {
 710                         /* otherwise send this char as-is */
 711                         os_data_char (new_char);
 712                 }
 713         }
 714 }
 715
 716 #define SEND_DATA_SIZE  20
 717 char send_parms[SEND_DATA_SIZE];
 718 char *send_ptr;
 719
 720 /* handle_send_packet interprits the protocol info and builds and
 721    sends an appropriate ack for what we can do */
 722 void handle_send_packet (int n)
 723 {
 724         int length = 3;
 725         int bytes;
 726
 727         /* initialize some protocol parameters */
 728         his_eol = END_CHAR;             /* default end of line character */
 729         his_pad_count = 0;
 730         his_pad_char = '\0';
 731         his_quote = K_ESCAPE;
 732
 733         /* ignore last character if it filled the buffer */
 734         if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
 735                 --send_ptr;
 736         bytes = send_ptr - send_parms;  /* how many bytes we'll process */
 737         do {
 738                 if (bytes-- <= 0)
 739                         break;
 740                 /* handle MAXL - max length */
 741                 /* ignore what he says - most I'll take (here) is 94 */
 742                 a_b[++length] = tochar (94);
 743                 if (bytes-- <= 0)
 744                         break;
 745                 /* handle TIME - time you should wait for my packets */
 746                 /* ignore what he says - don't wait for my ack longer than 1 second */
 747                 a_b[++length] = tochar (1);
 748                 if (bytes-- <= 0)
 749                         break;
 750                 /* handle NPAD - number of pad chars I need */
 751                 /* remember what he says - I need none */
 752                 his_pad_count = untochar (send_parms[2]);
 753                 a_b[++length] = tochar (0);
 754                 if (bytes-- <= 0)
 755                         break;
 756                 /* handle PADC - pad chars I need */
 757                 /* remember what he says - I need none */
 758                 his_pad_char = ktrans (send_parms[3]);
 759                 a_b[++length] = 0x40;   /* He should ignore this */
 760                 if (bytes-- <= 0)
 761                         break;
 762                 /* handle EOL - end of line he needs */
 763                 /* remember what he says - I need CR */
 764                 his_eol = untochar (send_parms[4]);
 765                 a_b[++length] = tochar (END_CHAR);
 766                 if (bytes-- <= 0)
 767                         break;
 768                 /* handle QCTL - quote control char he'll use */
 769                 /* remember what he says - I'll use '#' */
 770                 his_quote = send_parms[5];
 771                 a_b[++length] = '#';
 772                 if (bytes-- <= 0)
 773                         break;
 774                 /* handle QBIN - 8-th bit prefixing */
 775                 /* ignore what he says - I refuse */
 776                 a_b[++length] = 'N';
 777                 if (bytes-- <= 0)
 778                         break;
 779                 /* handle CHKT - the clock check type */
 780                 /* ignore what he says - I do type 1 (for now) */
 781                 a_b[++length] = '1';
 782                 if (bytes-- <= 0)
 783                         break;
 784                 /* handle REPT - the repeat prefix */
 785                 /* ignore what he says - I refuse (for now) */
 786                 a_b[++length] = 'N';
 787                 if (bytes-- <= 0)
 788                         break;
 789                 /* handle CAPAS - the capabilities mask */
 790                 /* ignore what he says - I only do long packets - I don't do windows */
 791                 a_b[++length] = tochar (2);     /* only long packets */
 792                 a_b[++length] = tochar (0);     /* no windows */
 793                 a_b[++length] = tochar (94);    /* large packet msb */
 794                 a_b[++length] = tochar (94);    /* large packet lsb */
 795         } while (0);
 796
 797         a_b[0] = START_CHAR;
 798         a_b[1] = tochar (length);
 799         a_b[2] = tochar (n);
 800         a_b[3] = ACK_TYPE;
 801         a_b[++length] = '\0';
 802         a_b[length] = tochar (chk1 (&a_b[1]));
 803         a_b[++length] = his_eol;
 804         a_b[++length] = '\0';
 805         s1_sendpacket (a_b);
 806 }
 807
 808 /* k_recv receives a OS Open image file over kermit line */
 809 static int k_recv (void)
 810 {
 811         char new_char;
 812         char k_state, k_state_saved;
 813         int sum;
 814         int done;
 815         int length;
 816         int n, last_n;
 817         int z = 0;
 818         int len_lo, len_hi;
 819
 820         /* initialize some protocol parameters */
 821         his_eol = END_CHAR;             /* default end of line character */
 822         his_pad_count = 0;
 823         his_pad_char = '\0';
 824         his_quote = K_ESCAPE;
 825
 826         /* initialize the k_recv and k_data state machine */
 827         done = 0;
 828         k_state = 0;
 829         k_data_init ();
 830         k_state_saved = k_state;
 831         k_data_save ();
 832         n = 0;                          /* just to get rid of a warning */
 833         last_n = -1;
 834
 835         /* expect this "type" sequence (but don't check):
 836            S: send initiate
 837            F: file header
 838            D: data (multiple)
 839            Z: end of file
 840            B: break transmission
 841          */
 842
 843         /* enter main loop */
 844         while (!done) {
 845                 /* set the send packet pointer to begining of send packet parms */
 846                 send_ptr = send_parms;
 847
 848                 /* With each packet, start summing the bytes starting with the length.
 849                    Save the current sequence number.
 850                    Note the type of the packet.
 851                    If a character less than SPACE (0x20) is received - error.
 852                  */
 853
 854 #if 0
 855                 /* OLD CODE, Prior to checking sequence numbers */
 856                 /* first have all state machines save current states */
 857                 k_state_saved = k_state;
 858                 k_data_save ();
 859 #endif
 860
 861                 /* get a packet */
 862                 /* wait for the starting character or ^C */
 863                 for (;;) {
 864                         switch (getc ()) {
 865                         case START_CHAR:        /* start packet */
 866                                 goto START;
 867                         case ETX_CHAR:          /* ^C waiting for packet */
 868                                 return (0);
 869                         default:
 870                                 ;
 871                         }
 872                 }
 873 START:
 874                 /* get length of packet */
 875                 sum = 0;
 876                 new_char = getc ();
 877                 if ((new_char & 0xE0) == 0)
 878                         goto packet_error;
 879                 sum += new_char & 0xff;
 880                 length = untochar (new_char);
 881                 /* get sequence number */
 882                 new_char = getc ();
 883                 if ((new_char & 0xE0) == 0)
 884                         goto packet_error;
 885                 sum += new_char & 0xff;
 886                 n = untochar (new_char);
 887                 --length;
 888
 889                 /* NEW CODE - check sequence numbers for retried packets */
 890                 /* Note - this new code assumes that the sequence number is correctly
 891                  * received.  Handling an invalid sequence number adds another layer
 892                  * of complexity that may not be needed - yet!  At this time, I'm hoping
 893                  * that I don't need to buffer the incoming data packets and can write
 894                  * the data into memory in real time.
 895                  */
 896                 if (n == last_n) {
 897                         /* same sequence number, restore the previous state */
 898                         k_state = k_state_saved;
 899                         k_data_restore ();
 900                 } else {
 901                         /* new sequence number, checkpoint the download */
 902                         last_n = n;
 903                         k_state_saved = k_state;
 904                         k_data_save ();
 905                 }
 906                 /* END NEW CODE */
 907
 908                 /* get packet type */
 909                 new_char = getc ();
 910                 if ((new_char & 0xE0) == 0)
 911                         goto packet_error;
 912                 sum += new_char & 0xff;
 913                 k_state = new_char;
 914                 --length;
 915                 /* check for extended length */
 916                 if (length == -2) {
 917                         /* (length byte was 0, decremented twice) */
 918                         /* get the two length bytes */
 919                         new_char = getc ();
 920                         if ((new_char & 0xE0) == 0)
 921                                 goto packet_error;
 922                         sum += new_char & 0xff;
 923                         len_hi = untochar (new_char);
 924                         new_char = getc ();
 925                         if ((new_char & 0xE0) == 0)
 926                                 goto packet_error;
 927                         sum += new_char & 0xff;
 928                         len_lo = untochar (new_char);
 929                         length = len_hi * 95 + len_lo;
 930                         /* check header checksum */
 931                         new_char = getc ();
 932                         if ((new_char & 0xE0) == 0)
 933                                 goto packet_error;
 934                         if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
 935                                 goto packet_error;
 936                         sum += new_char & 0xff;
 937 /* --length; */ /* new length includes only data and block check to come */
 938                 }
 939                 /* bring in rest of packet */
 940                 while (length > 1) {
 941                         new_char = getc ();
 942                         if ((new_char & 0xE0) == 0)
 943                                 goto packet_error;
 944                         sum += new_char & 0xff;
 945                         --length;
 946                         if (k_state == DATA_TYPE) {
 947                                 /* pass on the data if this is a data packet */
 948                                 k_data_char (new_char);
 949                         } else if (k_state == SEND_TYPE) {
 950                                 /* save send pack in buffer as is */
 951                                 *send_ptr++ = new_char;
 952                                 /* if too much data, back off the pointer */
 953                                 if (send_ptr >= &send_parms[SEND_DATA_SIZE])
 954                                         --send_ptr;
 955                         }
 956                 }
 957                 /* get and validate checksum character */
 958                 new_char = getc ();
 959                 if ((new_char & 0xE0) == 0)
 960                         goto packet_error;
 961                 if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
 962                         goto packet_error;
 963                 /* get END_CHAR */
 964                 new_char = getc ();
 965                 if (new_char != END_CHAR) {
 966                   packet_error:
 967                         /* restore state machines */
 968                         k_state = k_state_saved;
 969                         k_data_restore ();
 970                         /* send a negative acknowledge packet in */
 971                         send_nack (n);
 972                 } else if (k_state == SEND_TYPE) {
 973                         /* crack the protocol parms, build an appropriate ack packet */
 974                         handle_send_packet (n);
 975                 } else {
 976                         /* send simple acknowledge packet in */
 977                         send_ack (n);
 978                         /* quit if end of transmission */
 979                         if (k_state == BREAK_TYPE)
 980                                 done = 1;
 981                 }
 982                 ++z;
 983         }
 984         return ((ulong) os_data_addr - (ulong) bin_start_address);
 985 }
 986
 987 static int getcxmodem(void) {
 988         if (tstc())
 989                 return (getc());
 990         return -1;
 991 }
 992 static ulong load_serial_ymodem (ulong offset)
 993 {
 994         int size;
 995         char buf[32];
 996         int err;
 997         int res;
 998         connection_info_t info;
 999         char ymodemBuf[1024];
1000         ulong store_addr = ~0;
1001         ulong addr = 0;
1002
1003         size = 0;
1004         info.mode = xyzModem_ymodem;
1005         res = xyzModem_stream_open (&info, &err);
1006         if (!res) {
1007
1008                 while ((res =
1009                         xyzModem_stream_read (ymodemBuf, 1024, &err)) > 0) {
1010                         store_addr = addr + offset;
1011                         size += res;
1012                         addr += res;
1013 #ifndef CFG_NO_FLASH
1014                         if (addr2info (store_addr)) {
1015                                 int rc;
1016
1017                                 rc = flash_write ((char *) ymodemBuf,
1018                                                   store_addr, res);
1019                                 if (rc != 0) {
1020                                         flash_perror (rc);
1021                                         return (~0);
1022                                 }
1023                         } else
1024 #endif
1025                         {
1026                                 memcpy ((char *) (store_addr), ymodemBuf,
1027                                         res);
1028                         }
1029
1030                 }
1031         } else {
1032                 printf ("%s\n", xyzModem_error (err));
1033         }
1034
1035         xyzModem_stream_close (&err);
1036         xyzModem_stream_terminate (false, &getcxmodem);
1037
1038
1039         flush_cache (offset, size);
1040
1041         printf ("## Total Size      = 0x%08x = %d Bytes\n", size, size);
1042         sprintf (buf, "%X", size);
1043         setenv ("filesize", buf);
1044
1045         return offset;
1046 }
1047
1048 #endif
1049
1050 /* -------------------------------------------------------------------- */
1051
1052 #if defined(CONFIG_CMD_LOADS)
1053
1054 #ifdef  CFG_LOADS_BAUD_CHANGE
1055 U_BOOT_CMD(
1056         loads, 3, 0,    do_load_serial,
1057         "loads   - load S-Record file over serial line\n",
1058         "[ off ] [ baud ]\n"
1059         "    - load S-Record file over serial line"
1060         " with offset 'off' and baudrate 'baud'\n"
1061 );
1062
1063 #else   /* ! CFG_LOADS_BAUD_CHANGE */
1064 U_BOOT_CMD(
1065         loads, 2, 0,    do_load_serial,
1066         "loads   - load S-Record file over serial line\n",
1067         "[ off ]\n"
1068         "    - load S-Record file over serial line with offset 'off'\n"
1069 );
1070 #endif  /* CFG_LOADS_BAUD_CHANGE */
1071
1072 /*
1073  * SAVES always requires LOADS support, but not vice versa
1074  */
1075
1076
1077 #if defined(CONFIG_CMD_SAVES)
1078 #ifdef  CFG_LOADS_BAUD_CHANGE
1079 U_BOOT_CMD(
1080         saves, 4, 0,    do_save_serial,
1081         "saves   - save S-Record file over serial line\n",
1082         "[ off ] [size] [ baud ]\n"
1083         "    - save S-Record file over serial line"
1084         " with offset 'off', size 'size' and baudrate 'baud'\n"
1085 );
1086 #else   /* ! CFG_LOADS_BAUD_CHANGE */
1087 U_BOOT_CMD(
1088         saves, 3, 0,    do_save_serial,
1089         "saves   - save S-Record file over serial line\n",
1090         "[ off ] [size]\n"
1091         "    - save S-Record file over serial line with offset 'off' and size 'size'\n"
1092 );
1093 #endif  /* CFG_LOADS_BAUD_CHANGE */
1094 #endif
1095 #endif
1096
1097
1098 #if defined(CONFIG_CMD_LOADB)
1099 U_BOOT_CMD(
1100         loadb, 3, 0,    do_load_serial_bin,
1101         "loadb   - load binary file over serial line (kermit mode)\n",
1102         "[ off ] [ baud ]\n"
1103         "    - load binary file over serial line"
1104         " with offset 'off' and baudrate 'baud'\n"
1105 );
1106
1107 U_BOOT_CMD(
1108         loady, 3, 0,    do_load_serial_bin,
1109         "loady   - load binary file over serial line (ymodem mode)\n",
1110         "[ off ] [ baud ]\n"
1111         "    - load binary file over serial line"
1112         " with offset 'off' and baudrate 'baud'\n"
1113 );
1114
1115 #endif
1116
1117 /* -------------------------------------------------------------------- */
1118
1119 #if defined(CONFIG_CMD_HWFLOW)
1120 int do_hwflow (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
1121 {
1122         extern int hwflow_onoff(int);
1123
1124         if (argc == 2) {
1125                 if (strcmp(argv[1], "off") == 0)
1126                         hwflow_onoff(-1);
1127                 else
1128                         if (strcmp(argv[1], "on") == 0)
1129                                 hwflow_onoff(1);
1130                         else
1131                                 printf("Usage: %s\n", cmdtp->usage);
1132         }
1133         printf("RTS/CTS hardware flow control: %s\n", hwflow_onoff(0) ? "on" : "off");
1134         return 0;
1135 }
1136
1137 /* -------------------------------------------------------------------- */
1138
1139 U_BOOT_CMD(
1140         hwflow, 2, 0,   do_hwflow,
1141         "hwflow  - turn the harwdare flow control on/off\n",
1142         "[on|off]\n - change RTS/CTS hardware flow control over serial line\n"
1143 );
1144
1145 #endif