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 (long 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         long offset = 0;
  57         ulong addr;
  58         int i;
  59         char *env_echo;
  60         int rcode = 0;
  61 #ifdef  CONFIG_SYS_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  CONFIG_SYS_LOADS_BAUD_CHANGE
  74         if (argc >= 2) {
  75                 offset = simple_strtol(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   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
  97         if (argc == 2) {
  98                 offset = simple_strtol(argv[1], NULL, 16);
  99         }
 100 #endif  /* CONFIG_SYS_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  CONFIG_SYS_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 (long 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 CONFIG_SYS_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  CONFIG_SYS_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  CONFIG_SYS_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   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
 295         if (argc == 3) {
 296                 size = simple_strtoul(argv[2], NULL, 16);
 297         }
 298 #endif  /* CONFIG_SYS_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  CONFIG_SYS_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 static void set_kerm_bin_mode(unsigned long *);
 427 static int k_recv(void);
 428 static ulong load_serial_bin (ulong offset);
 429
 430
 431 char his_eol;        /* character he needs at end of packet */
 432 int  his_pad_count;  /* number of pad chars he needs */
 433 char his_pad_char;   /* pad chars he needs */
 434 char his_quote;      /* quote chars he'll use */
 435
 436 int do_load_serial_bin (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 437 {
 438         ulong offset = 0;
 439         ulong addr;
 440         int load_baudrate, current_baudrate;
 441         int rcode = 0;
 442         char *s;
 443
 444         /* pre-set offset from CONFIG_SYS_LOAD_ADDR */
 445         offset = CONFIG_SYS_LOAD_ADDR;
 446
 447         /* pre-set offset from $loadaddr */
 448         if ((s = getenv("loadaddr")) != NULL) {
 449                 offset = simple_strtoul(s, NULL, 16);
 450         }
 451
 452         load_baudrate = current_baudrate = gd->baudrate;
 453
 454         if (argc >= 2) {
 455                 offset = simple_strtoul(argv[1], NULL, 16);
 456         }
 457         if (argc == 3) {
 458                 load_baudrate = (int)simple_strtoul(argv[2], NULL, 10);
 459
 460                 /* default to current baudrate */
 461                 if (load_baudrate == 0)
 462                         load_baudrate = current_baudrate;
 463         }
 464
 465         if (load_baudrate != current_baudrate) {
 466                 printf ("## Switch baudrate to %d bps and press ENTER ...\n",
 467                         load_baudrate);
 468                 udelay(50000);
 469                 gd->baudrate = load_baudrate;
 470                 serial_setbrg ();
 471                 udelay(50000);
 472                 for (;;) {
 473                         if (getc() == '\r')
 474                                 break;
 475                 }
 476         }
 477
 478         if (strcmp(argv[0],"loady")==0) {
 479                 printf ("## Ready for binary (ymodem) download "
 480                         "to 0x%08lX at %d bps...\n",
 481                         offset,
 482                         load_baudrate);
 483
 484                 addr = load_serial_ymodem (offset);
 485
 486         } else {
 487
 488                 printf ("## Ready for binary (kermit) download "
 489                         "to 0x%08lX at %d bps...\n",
 490                         offset,
 491                         load_baudrate);
 492                 addr = load_serial_bin (offset);
 493
 494                 if (addr == ~0) {
 495                         load_addr = 0;
 496                         printf ("## Binary (kermit) download aborted\n");
 497                         rcode = 1;
 498                 } else {
 499                         printf ("## Start Addr      = 0x%08lX\n", addr);
 500                         load_addr = addr;
 501                 }
 502         }
 503         if (load_baudrate != current_baudrate) {
 504                 printf ("## Switch baudrate to %d bps and press ESC ...\n",
 505                         current_baudrate);
 506                 udelay (50000);
 507                 gd->baudrate = current_baudrate;
 508                 serial_setbrg ();
 509                 udelay (50000);
 510                 for (;;) {
 511                         if (getc() == 0x1B) /* ESC */
 512                                 break;
 513                 }
 514         }
 515
 516 #ifdef CONFIG_AUTOSCRIPT
 517         if (load_addr) {
 518                 char *s;
 519
 520                 if (((s = getenv("autoscript")) != NULL) && (strcmp(s,"yes") == 0)) {
 521                         printf ("Running autoscript at addr 0x%08lX", load_addr);
 522
 523                         s = getenv ("autoscript_uname");
 524                         if (s)
 525                                 printf (":%s ...\n", s);
 526                         else
 527                                 puts (" ...\n");
 528
 529                         rcode = autoscript (load_addr, s);
 530                 }
 531         }
 532 #endif
 533         return rcode;
 534 }
 535
 536
 537 static ulong load_serial_bin (ulong offset)
 538 {
 539         int size, i;
 540         char buf[32];
 541
 542         set_kerm_bin_mode ((ulong *) offset);
 543         size = k_recv ();
 544
 545         /*
 546          * Gather any trailing characters (for instance, the ^D which
 547          * is sent by 'cu' after sending a file), and give the
 548          * box some time (100 * 1 ms)
 549          */
 550         for (i=0; i<100; ++i) {
 551                 if (tstc()) {
 552                         (void) getc();
 553                 }
 554                 udelay(1000);
 555         }
 556
 557         flush_cache (offset, size);
 558
 559         printf("## Total Size      = 0x%08x = %d Bytes\n", size, size);
 560         sprintf(buf, "%X", size);
 561         setenv("filesize", buf);
 562
 563         return offset;
 564 }
 565
 566 void send_pad (void)
 567 {
 568         int count = his_pad_count;
 569
 570         while (count-- > 0)
 571                 putc (his_pad_char);
 572 }
 573
 574 /* converts escaped kermit char to binary char */
 575 char ktrans (char in)
 576 {
 577         if ((in & 0x60) == 0x40) {
 578                 return (char) (in & ~0x40);
 579         } else if ((in & 0x7f) == 0x3f) {
 580                 return (char) (in | 0x40);
 581         } else
 582                 return in;
 583 }
 584
 585 int chk1 (char *buffer)
 586 {
 587         int total = 0;
 588
 589         while (*buffer) {
 590                 total += *buffer++;
 591         }
 592         return (int) ((total + ((total >> 6) & 0x03)) & 0x3f);
 593 }
 594
 595 void s1_sendpacket (char *packet)
 596 {
 597         send_pad ();
 598         while (*packet) {
 599                 putc (*packet++);
 600         }
 601 }
 602
 603 static char a_b[24];
 604 void send_ack (int n)
 605 {
 606         a_b[0] = START_CHAR;
 607         a_b[1] = tochar (3);
 608         a_b[2] = tochar (n);
 609         a_b[3] = ACK_TYPE;
 610         a_b[4] = '\0';
 611         a_b[4] = tochar (chk1 (&a_b[1]));
 612         a_b[5] = his_eol;
 613         a_b[6] = '\0';
 614         s1_sendpacket (a_b);
 615 }
 616
 617 void send_nack (int n)
 618 {
 619         a_b[0] = START_CHAR;
 620         a_b[1] = tochar (3);
 621         a_b[2] = tochar (n);
 622         a_b[3] = NACK_TYPE;
 623         a_b[4] = '\0';
 624         a_b[4] = tochar (chk1 (&a_b[1]));
 625         a_b[5] = his_eol;
 626         a_b[6] = '\0';
 627         s1_sendpacket (a_b);
 628 }
 629
 630
 631 void (*os_data_init) (void);
 632 void (*os_data_char) (char new_char);
 633 static int os_data_state, os_data_state_saved;
 634 static char *os_data_addr, *os_data_addr_saved;
 635 static char *bin_start_address;
 636
 637 static void bin_data_init (void)
 638 {
 639         os_data_state = 0;
 640         os_data_addr = bin_start_address;
 641 }
 642
 643 static void os_data_save (void)
 644 {
 645         os_data_state_saved = os_data_state;
 646         os_data_addr_saved = os_data_addr;
 647 }
 648
 649 static void os_data_restore (void)
 650 {
 651         os_data_state = os_data_state_saved;
 652         os_data_addr = os_data_addr_saved;
 653 }
 654
 655 static void bin_data_char (char new_char)
 656 {
 657         switch (os_data_state) {
 658         case 0:                                 /* data */
 659                 *os_data_addr++ = new_char;
 660                 break;
 661         }
 662 }
 663
 664 static void set_kerm_bin_mode (unsigned long *addr)
 665 {
 666         bin_start_address = (char *) addr;
 667         os_data_init = bin_data_init;
 668         os_data_char = bin_data_char;
 669 }
 670
 671
 672 /* k_data_* simply handles the kermit escape translations */
 673 static int k_data_escape, k_data_escape_saved;
 674 void k_data_init (void)
 675 {
 676         k_data_escape = 0;
 677         os_data_init ();
 678 }
 679
 680 void k_data_save (void)
 681 {
 682         k_data_escape_saved = k_data_escape;
 683         os_data_save ();
 684 }
 685
 686 void k_data_restore (void)
 687 {
 688         k_data_escape = k_data_escape_saved;
 689         os_data_restore ();
 690 }
 691
 692 void k_data_char (char new_char)
 693 {
 694         if (k_data_escape) {
 695                 /* last char was escape - translate this character */
 696                 os_data_char (ktrans (new_char));
 697                 k_data_escape = 0;
 698         } else {
 699                 if (new_char == his_quote) {
 700                         /* this char is escape - remember */
 701                         k_data_escape = 1;
 702                 } else {
 703                         /* otherwise send this char as-is */
 704                         os_data_char (new_char);
 705                 }
 706         }
 707 }
 708
 709 #define SEND_DATA_SIZE  20
 710 char send_parms[SEND_DATA_SIZE];
 711 char *send_ptr;
 712
 713 /* handle_send_packet interprits the protocol info and builds and
 714    sends an appropriate ack for what we can do */
 715 void handle_send_packet (int n)
 716 {
 717         int length = 3;
 718         int bytes;
 719
 720         /* initialize some protocol parameters */
 721         his_eol = END_CHAR;             /* default end of line character */
 722         his_pad_count = 0;
 723         his_pad_char = '\0';
 724         his_quote = K_ESCAPE;
 725
 726         /* ignore last character if it filled the buffer */
 727         if (send_ptr == &send_parms[SEND_DATA_SIZE - 1])
 728                 --send_ptr;
 729         bytes = send_ptr - send_parms;  /* how many bytes we'll process */
 730         do {
 731                 if (bytes-- <= 0)
 732                         break;
 733                 /* handle MAXL - max length */
 734                 /* ignore what he says - most I'll take (here) is 94 */
 735                 a_b[++length] = tochar (94);
 736                 if (bytes-- <= 0)
 737                         break;
 738                 /* handle TIME - time you should wait for my packets */
 739                 /* ignore what he says - don't wait for my ack longer than 1 second */
 740                 a_b[++length] = tochar (1);
 741                 if (bytes-- <= 0)
 742                         break;
 743                 /* handle NPAD - number of pad chars I need */
 744                 /* remember what he says - I need none */
 745                 his_pad_count = untochar (send_parms[2]);
 746                 a_b[++length] = tochar (0);
 747                 if (bytes-- <= 0)
 748                         break;
 749                 /* handle PADC - pad chars I need */
 750                 /* remember what he says - I need none */
 751                 his_pad_char = ktrans (send_parms[3]);
 752                 a_b[++length] = 0x40;   /* He should ignore this */
 753                 if (bytes-- <= 0)
 754                         break;
 755                 /* handle EOL - end of line he needs */
 756                 /* remember what he says - I need CR */
 757                 his_eol = untochar (send_parms[4]);
 758                 a_b[++length] = tochar (END_CHAR);
 759                 if (bytes-- <= 0)
 760                         break;
 761                 /* handle QCTL - quote control char he'll use */
 762                 /* remember what he says - I'll use '#' */
 763                 his_quote = send_parms[5];
 764                 a_b[++length] = '#';
 765                 if (bytes-- <= 0)
 766                         break;
 767                 /* handle QBIN - 8-th bit prefixing */
 768                 /* ignore what he says - I refuse */
 769                 a_b[++length] = 'N';
 770                 if (bytes-- <= 0)
 771                         break;
 772                 /* handle CHKT - the clock check type */
 773                 /* ignore what he says - I do type 1 (for now) */
 774                 a_b[++length] = '1';
 775                 if (bytes-- <= 0)
 776                         break;
 777                 /* handle REPT - the repeat prefix */
 778                 /* ignore what he says - I refuse (for now) */
 779                 a_b[++length] = 'N';
 780                 if (bytes-- <= 0)
 781                         break;
 782                 /* handle CAPAS - the capabilities mask */
 783                 /* ignore what he says - I only do long packets - I don't do windows */
 784                 a_b[++length] = tochar (2);     /* only long packets */
 785                 a_b[++length] = tochar (0);     /* no windows */
 786                 a_b[++length] = tochar (94);    /* large packet msb */
 787                 a_b[++length] = tochar (94);    /* large packet lsb */
 788         } while (0);
 789
 790         a_b[0] = START_CHAR;
 791         a_b[1] = tochar (length);
 792         a_b[2] = tochar (n);
 793         a_b[3] = ACK_TYPE;
 794         a_b[++length] = '\0';
 795         a_b[length] = tochar (chk1 (&a_b[1]));
 796         a_b[++length] = his_eol;
 797         a_b[++length] = '\0';
 798         s1_sendpacket (a_b);
 799 }
 800
 801 /* k_recv receives a OS Open image file over kermit line */
 802 static int k_recv (void)
 803 {
 804         char new_char;
 805         char k_state, k_state_saved;
 806         int sum;
 807         int done;
 808         int length;
 809         int n, last_n;
 810         int len_lo, len_hi;
 811
 812         /* initialize some protocol parameters */
 813         his_eol = END_CHAR;             /* default end of line character */
 814         his_pad_count = 0;
 815         his_pad_char = '\0';
 816         his_quote = K_ESCAPE;
 817
 818         /* initialize the k_recv and k_data state machine */
 819         done = 0;
 820         k_state = 0;
 821         k_data_init ();
 822         k_state_saved = k_state;
 823         k_data_save ();
 824         n = 0;                          /* just to get rid of a warning */
 825         last_n = -1;
 826
 827         /* expect this "type" sequence (but don't check):
 828            S: send initiate
 829            F: file header
 830            D: data (multiple)
 831            Z: end of file
 832            B: break transmission
 833          */
 834
 835         /* enter main loop */
 836         while (!done) {
 837                 /* set the send packet pointer to begining of send packet parms */
 838                 send_ptr = send_parms;
 839
 840                 /* With each packet, start summing the bytes starting with the length.
 841                    Save the current sequence number.
 842                    Note the type of the packet.
 843                    If a character less than SPACE (0x20) is received - error.
 844                  */
 845
 846 #if 0
 847                 /* OLD CODE, Prior to checking sequence numbers */
 848                 /* first have all state machines save current states */
 849                 k_state_saved = k_state;
 850                 k_data_save ();
 851 #endif
 852
 853                 /* get a packet */
 854                 /* wait for the starting character or ^C */
 855                 for (;;) {
 856                         switch (getc ()) {
 857                         case START_CHAR:        /* start packet */
 858                                 goto START;
 859                         case ETX_CHAR:          /* ^C waiting for packet */
 860                                 return (0);
 861                         default:
 862                                 ;
 863                         }
 864                 }
 865 START:
 866                 /* get length of packet */
 867                 sum = 0;
 868                 new_char = getc ();
 869                 if ((new_char & 0xE0) == 0)
 870                         goto packet_error;
 871                 sum += new_char & 0xff;
 872                 length = untochar (new_char);
 873                 /* get sequence number */
 874                 new_char = getc ();
 875                 if ((new_char & 0xE0) == 0)
 876                         goto packet_error;
 877                 sum += new_char & 0xff;
 878                 n = untochar (new_char);
 879                 --length;
 880
 881                 /* NEW CODE - check sequence numbers for retried packets */
 882                 /* Note - this new code assumes that the sequence number is correctly
 883                  * received.  Handling an invalid sequence number adds another layer
 884                  * of complexity that may not be needed - yet!  At this time, I'm hoping
 885                  * that I don't need to buffer the incoming data packets and can write
 886                  * the data into memory in real time.
 887                  */
 888                 if (n == last_n) {
 889                         /* same sequence number, restore the previous state */
 890                         k_state = k_state_saved;
 891                         k_data_restore ();
 892                 } else {
 893                         /* new sequence number, checkpoint the download */
 894                         last_n = n;
 895                         k_state_saved = k_state;
 896                         k_data_save ();
 897                 }
 898                 /* END NEW CODE */
 899
 900                 /* get packet type */
 901                 new_char = getc ();
 902                 if ((new_char & 0xE0) == 0)
 903                         goto packet_error;
 904                 sum += new_char & 0xff;
 905                 k_state = new_char;
 906                 --length;
 907                 /* check for extended length */
 908                 if (length == -2) {
 909                         /* (length byte was 0, decremented twice) */
 910                         /* get the two length bytes */
 911                         new_char = getc ();
 912                         if ((new_char & 0xE0) == 0)
 913                                 goto packet_error;
 914                         sum += new_char & 0xff;
 915                         len_hi = untochar (new_char);
 916                         new_char = getc ();
 917                         if ((new_char & 0xE0) == 0)
 918                                 goto packet_error;
 919                         sum += new_char & 0xff;
 920                         len_lo = untochar (new_char);
 921                         length = len_hi * 95 + len_lo;
 922                         /* check header checksum */
 923                         new_char = getc ();
 924                         if ((new_char & 0xE0) == 0)
 925                                 goto packet_error;
 926                         if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
 927                                 goto packet_error;
 928                         sum += new_char & 0xff;
 929 /* --length; */ /* new length includes only data and block check to come */
 930                 }
 931                 /* bring in rest of packet */
 932                 while (length > 1) {
 933                         new_char = getc ();
 934                         if ((new_char & 0xE0) == 0)
 935                                 goto packet_error;
 936                         sum += new_char & 0xff;
 937                         --length;
 938                         if (k_state == DATA_TYPE) {
 939                                 /* pass on the data if this is a data packet */
 940                                 k_data_char (new_char);
 941                         } else if (k_state == SEND_TYPE) {
 942                                 /* save send pack in buffer as is */
 943                                 *send_ptr++ = new_char;
 944                                 /* if too much data, back off the pointer */
 945                                 if (send_ptr >= &send_parms[SEND_DATA_SIZE])
 946                                         --send_ptr;
 947                         }
 948                 }
 949                 /* get and validate checksum character */
 950                 new_char = getc ();
 951                 if ((new_char & 0xE0) == 0)
 952                         goto packet_error;
 953                 if (new_char != tochar ((sum + ((sum >> 6) & 0x03)) & 0x3f))
 954                         goto packet_error;
 955                 /* get END_CHAR */
 956                 new_char = getc ();
 957                 if (new_char != END_CHAR) {
 958                   packet_error:
 959                         /* restore state machines */
 960                         k_state = k_state_saved;
 961                         k_data_restore ();
 962                         /* send a negative acknowledge packet in */
 963                         send_nack (n);
 964                 } else if (k_state == SEND_TYPE) {
 965                         /* crack the protocol parms, build an appropriate ack packet */
 966                         handle_send_packet (n);
 967                 } else {
 968                         /* send simple acknowledge packet in */
 969                         send_ack (n);
 970                         /* quit if end of transmission */
 971                         if (k_state == BREAK_TYPE)
 972                                 done = 1;
 973                 }
 974         }
 975         return ((ulong) os_data_addr - (ulong) bin_start_address);
 976 }
 977
 978 static int getcxmodem(void) {
 979         if (tstc())
 980                 return (getc());
 981         return -1;
 982 }
 983 static ulong load_serial_ymodem (ulong offset)
 984 {
 985         int size;
 986         char buf[32];
 987         int err;
 988         int res;
 989         connection_info_t info;
 990         char ymodemBuf[1024];
 991         ulong store_addr = ~0;
 992         ulong addr = 0;
 993
 994         size = 0;
 995         info.mode = xyzModem_ymodem;
 996         res = xyzModem_stream_open (&info, &err);
 997         if (!res) {
 998
 999                 while ((res =
1000                         xyzModem_stream_read (ymodemBuf, 1024, &err)) > 0) {
1001                         store_addr = addr + offset;
1002                         size += res;
1003                         addr += res;
1004 #ifndef CONFIG_SYS_NO_FLASH
1005                         if (addr2info (store_addr)) {
1006                                 int rc;
1007
1008                                 rc = flash_write ((char *) ymodemBuf,
1009                                                   store_addr, res);
1010                                 if (rc != 0) {
1011                                         flash_perror (rc);
1012                                         return (~0);
1013                                 }
1014                         } else
1015 #endif
1016                         {
1017                                 memcpy ((char *) (store_addr), ymodemBuf,
1018                                         res);
1019                         }
1020
1021                 }
1022         } else {
1023                 printf ("%s\n", xyzModem_error (err));
1024         }
1025
1026         xyzModem_stream_close (&err);
1027         xyzModem_stream_terminate (false, &getcxmodem);
1028
1029
1030         flush_cache (offset, size);
1031
1032         printf ("## Total Size      = 0x%08x = %d Bytes\n", size, size);
1033         sprintf (buf, "%X", size);
1034         setenv ("filesize", buf);
1035
1036         return offset;
1037 }
1038
1039 #endif
1040
1041 /* -------------------------------------------------------------------- */
1042
1043 #if defined(CONFIG_CMD_LOADS)
1044
1045 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
1046 U_BOOT_CMD(
1047         loads, 3, 0,    do_load_serial,
1048         "load S-Record file over serial line",
1049         "[ off ] [ baud ]\n"
1050         "    - load S-Record file over serial line"
1051         " with offset 'off' and baudrate 'baud'\n"
1052 );
1053
1054 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1055 U_BOOT_CMD(
1056         loads, 2, 0,    do_load_serial,
1057         "load S-Record file over serial line",
1058         "[ off ]\n"
1059         "    - load S-Record file over serial line with offset 'off'\n"
1060 );
1061 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1062
1063 /*
1064  * SAVES always requires LOADS support, but not vice versa
1065  */
1066
1067
1068 #if defined(CONFIG_CMD_SAVES)
1069 #ifdef  CONFIG_SYS_LOADS_BAUD_CHANGE
1070 U_BOOT_CMD(
1071         saves, 4, 0,    do_save_serial,
1072         "save S-Record file over serial line",
1073         "[ off ] [size] [ baud ]\n"
1074         "    - save S-Record file over serial line"
1075         " with offset 'off', size 'size' and baudrate 'baud'\n"
1076 );
1077 #else   /* ! CONFIG_SYS_LOADS_BAUD_CHANGE */
1078 U_BOOT_CMD(
1079         saves, 3, 0,    do_save_serial,
1080         "save S-Record file over serial line",
1081         "[ off ] [size]\n"
1082         "    - save S-Record file over serial line with offset 'off' and size 'size'\n"
1083 );
1084 #endif  /* CONFIG_SYS_LOADS_BAUD_CHANGE */
1085 #endif
1086 #endif
1087
1088
1089 #if defined(CONFIG_CMD_LOADB)
1090 U_BOOT_CMD(
1091         loadb, 3, 0,    do_load_serial_bin,
1092         "load binary file over serial line (kermit mode)",
1093         "[ off ] [ baud ]\n"
1094         "    - load binary file over serial line"
1095         " with offset 'off' and baudrate 'baud'\n"
1096 );
1097
1098 U_BOOT_CMD(
1099         loady, 3, 0,    do_load_serial_bin,
1100         "load binary file over serial line (ymodem mode)",
1101         "[ off ] [ baud ]\n"
1102         "    - load binary file over serial line"
1103         " with offset 'off' and baudrate 'baud'\n"
1104 );
1105
1106 #endif
1107
1108 /* -------------------------------------------------------------------- */
1109
1110 #if defined(CONFIG_CMD_HWFLOW)
1111 int do_hwflow (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
1112 {
1113         extern int hwflow_onoff(int);
1114
1115         if (argc == 2) {
1116                 if (strcmp(argv[1], "off") == 0)
1117                         hwflow_onoff(-1);
1118                 else
1119                         if (strcmp(argv[1], "on") == 0)
1120                                 hwflow_onoff(1);
1121                         else
1122                                 cmd_usage(cmdtp);
1123         }
1124         printf("RTS/CTS hardware flow control: %s\n", hwflow_onoff(0) ? "on" : "off");
1125         return 0;
1126 }
1127
1128 /* -------------------------------------------------------------------- */
1129
1130 U_BOOT_CMD(
1131         hwflow, 2, 0,   do_hwflow,
1132         "turn the harwdare flow control on/off",
1133         "[on|off]\n - change RTS/CTS hardware flow control over serial line\n"
1134 );
1135
1136 #endif