common/console.c

   1 /*
   2  * (C) Copyright 2000
   3  * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <debug_uart.h>
  10 #include <stdarg.h>
  11 #include <iomux.h>
  12 #include <malloc.h>
  13 #include <os.h>
  14 #include <serial.h>
  15 #include <stdio_dev.h>
  16 #include <exports.h>
  17 #include <environment.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 static int on_console(const char *name, const char *value, enum env_op op,
  22         int flags)
  23 {
  24         int console = -1;
  25
  26         /* Check for console redirection */
  27         if (strcmp(name, "stdin") == 0)
  28                 console = stdin;
  29         else if (strcmp(name, "stdout") == 0)
  30                 console = stdout;
  31         else if (strcmp(name, "stderr") == 0)
  32                 console = stderr;
  33
  34         /* if not actually setting a console variable, we don't care */
  35         if (console == -1 || (gd->flags & GD_FLG_DEVINIT) == 0)
  36                 return 0;
  37
  38         switch (op) {
  39         case env_op_create:
  40         case env_op_overwrite:
  41
  42 #ifdef CONFIG_CONSOLE_MUX
  43                 if (iomux_doenv(console, value))
  44                         return 1;
  45 #else
  46                 /* Try assigning specified device */
  47                 if (console_assign(console, value) < 0)
  48                         return 1;
  49 #endif /* CONFIG_CONSOLE_MUX */
  50                 return 0;
  51
  52         case env_op_delete:
  53                 if ((flags & H_FORCE) == 0)
  54                         printf("Can't delete \"%s\"\n", name);
  55                 return 1;
  56
  57         default:
  58                 return 0;
  59         }
  60 }
  61 U_BOOT_ENV_CALLBACK(console, on_console);
  62
  63 #ifdef CONFIG_SILENT_CONSOLE
  64 static int on_silent(const char *name, const char *value, enum env_op op,
  65         int flags)
  66 {
  67 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
  68         if (flags & H_INTERACTIVE)
  69                 return 0;
  70 #endif
  71 #ifndef CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
  72         if ((flags & H_INTERACTIVE) == 0)
  73                 return 0;
  74 #endif
  75
  76         if (value != NULL)
  77                 gd->flags |= GD_FLG_SILENT;
  78         else
  79                 gd->flags &= ~GD_FLG_SILENT;
  80
  81         return 0;
  82 }
  83 U_BOOT_ENV_CALLBACK(silent, on_silent);
  84 #endif
  85
  86 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
  87 /*
  88  * if overwrite_console returns 1, the stdin, stderr and stdout
  89  * are switched to the serial port, else the settings in the
  90  * environment are used
  91  */
  92 #ifdef CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE
  93 extern int overwrite_console(void);
  94 #define OVERWRITE_CONSOLE overwrite_console()
  95 #else
  96 #define OVERWRITE_CONSOLE 0
  97 #endif /* CONFIG_SYS_CONSOLE_OVERWRITE_ROUTINE */
  98
  99 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
 100
 101 static int console_setfile(int file, struct stdio_dev * dev)
 102 {
 103         int error = 0;
 104
 105         if (dev == NULL)
 106                 return -1;
 107
 108         switch (file) {
 109         case stdin:
 110         case stdout:
 111         case stderr:
 112                 /* Start new device */
 113                 if (dev->start) {
 114                         error = dev->start(dev);
 115                         /* If it's not started dont use it */
 116                         if (error < 0)
 117                                 break;
 118                 }
 119
 120                 /* Assign the new device (leaving the existing one started) */
 121                 stdio_devices[file] = dev;
 122
 123                 /*
 124                  * Update monitor functions
 125                  * (to use the console stuff by other applications)
 126                  */
 127                 switch (file) {
 128                 case stdin:
 129                         gd->jt->getc = getc;
 130                         gd->jt->tstc = tstc;
 131                         break;
 132                 case stdout:
 133                         gd->jt->putc  = putc;
 134                         gd->jt->puts  = puts;
 135                         gd->jt->printf = printf;
 136                         break;
 137                 }
 138                 break;
 139
 140         default:                /* Invalid file ID */
 141                 error = -1;
 142         }
 143         return error;
 144 }
 145
 146 #if defined(CONFIG_CONSOLE_MUX)
 147 /** Console I/O multiplexing *******************************************/
 148
 149 static struct stdio_dev *tstcdev;
 150 struct stdio_dev **console_devices[MAX_FILES];
 151 int cd_count[MAX_FILES];
 152
 153 /*
 154  * This depends on tstc() always being called before getc().
 155  * This is guaranteed to be true because this routine is called
 156  * only from fgetc() which assures it.
 157  * No attempt is made to demultiplex multiple input sources.
 158  */
 159 static int console_getc(int file)
 160 {
 161         unsigned char ret;
 162
 163         /* This is never called with testcdev == NULL */
 164         ret = tstcdev->getc(tstcdev);
 165         tstcdev = NULL;
 166         return ret;
 167 }
 168
 169 static int console_tstc(int file)
 170 {
 171         int i, ret;
 172         struct stdio_dev *dev;
 173
 174         disable_ctrlc(1);
 175         for (i = 0; i < cd_count[file]; i++) {
 176                 dev = console_devices[file][i];
 177                 if (dev->tstc != NULL) {
 178                         ret = dev->tstc(dev);
 179                         if (ret > 0) {
 180                                 tstcdev = dev;
 181                                 disable_ctrlc(0);
 182                                 return ret;
 183                         }
 184                 }
 185         }
 186         disable_ctrlc(0);
 187
 188         return 0;
 189 }
 190
 191 static void console_putc(int file, const char c)
 192 {
 193         int i;
 194         struct stdio_dev *dev;
 195
 196         for (i = 0; i < cd_count[file]; i++) {
 197                 dev = console_devices[file][i];
 198                 if (dev->putc != NULL)
 199                         dev->putc(dev, c);
 200         }
 201 }
 202
 203 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 204 static void console_puts_noserial(int file, const char *s)
 205 {
 206         int i;
 207         struct stdio_dev *dev;
 208
 209         for (i = 0; i < cd_count[file]; i++) {
 210                 dev = console_devices[file][i];
 211                 if (dev->puts != NULL && strcmp(dev->name, "serial") != 0)
 212                         dev->puts(dev, s);
 213         }
 214 }
 215 #endif
 216
 217 static void console_puts(int file, const char *s)
 218 {
 219         int i;
 220         struct stdio_dev *dev;
 221
 222         for (i = 0; i < cd_count[file]; i++) {
 223                 dev = console_devices[file][i];
 224                 if (dev->puts != NULL)
 225                         dev->puts(dev, s);
 226         }
 227 }
 228
 229 static inline void console_printdevs(int file)
 230 {
 231         iomux_printdevs(file);
 232 }
 233
 234 static inline void console_doenv(int file, struct stdio_dev *dev)
 235 {
 236         iomux_doenv(file, dev->name);
 237 }
 238 #else
 239 static inline int console_getc(int file)
 240 {
 241         return stdio_devices[file]->getc(stdio_devices[file]);
 242 }
 243
 244 static inline int console_tstc(int file)
 245 {
 246         return stdio_devices[file]->tstc(stdio_devices[file]);
 247 }
 248
 249 static inline void console_putc(int file, const char c)
 250 {
 251         stdio_devices[file]->putc(stdio_devices[file], c);
 252 }
 253
 254 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 255 static inline void console_puts_noserial(int file, const char *s)
 256 {
 257         if (strcmp(stdio_devices[file]->name, "serial") != 0)
 258                 stdio_devices[file]->puts(stdio_devices[file], s);
 259 }
 260 #endif
 261
 262 static inline void console_puts(int file, const char *s)
 263 {
 264         stdio_devices[file]->puts(stdio_devices[file], s);
 265 }
 266
 267 static inline void console_printdevs(int file)
 268 {
 269         printf("%s\n", stdio_devices[file]->name);
 270 }
 271
 272 static inline void console_doenv(int file, struct stdio_dev *dev)
 273 {
 274         console_setfile(file, dev);
 275 }
 276 #endif /* defined(CONFIG_CONSOLE_MUX) */
 277
 278 /** U-Boot INITIAL CONSOLE-NOT COMPATIBLE FUNCTIONS *************************/
 279
 280 int serial_printf(const char *fmt, ...)
 281 {
 282         va_list args;
 283         uint i;
 284         char printbuffer[CONFIG_SYS_PBSIZE];
 285
 286         va_start(args, fmt);
 287
 288         /* For this to work, printbuffer must be larger than
 289          * anything we ever want to print.
 290          */
 291         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 292         va_end(args);
 293
 294         serial_puts(printbuffer);
 295         return i;
 296 }
 297
 298 int fgetc(int file)
 299 {
 300         if (file < MAX_FILES) {
 301 #if defined(CONFIG_CONSOLE_MUX)
 302                 /*
 303                  * Effectively poll for input wherever it may be available.
 304                  */
 305                 for (;;) {
 306                         /*
 307                          * Upper layer may have already called tstc() so
 308                          * check for that first.
 309                          */
 310                         if (tstcdev != NULL)
 311                                 return console_getc(file);
 312                         console_tstc(file);
 313 #ifdef CONFIG_WATCHDOG
 314                         /*
 315                          * If the watchdog must be rate-limited then it should
 316                          * already be handled in board-specific code.
 317                          */
 318                          udelay(1);
 319 #endif
 320                 }
 321 #else
 322                 return console_getc(file);
 323 #endif
 324         }
 325
 326         return -1;
 327 }
 328
 329 int ftstc(int file)
 330 {
 331         if (file < MAX_FILES)
 332                 return console_tstc(file);
 333
 334         return -1;
 335 }
 336
 337 void fputc(int file, const char c)
 338 {
 339         if (file < MAX_FILES)
 340                 console_putc(file, c);
 341 }
 342
 343 void fputs(int file, const char *s)
 344 {
 345         if (file < MAX_FILES)
 346                 console_puts(file, s);
 347 }
 348
 349 int fprintf(int file, const char *fmt, ...)
 350 {
 351         va_list args;
 352         uint i;
 353         char printbuffer[CONFIG_SYS_PBSIZE];
 354
 355         va_start(args, fmt);
 356
 357         /* For this to work, printbuffer must be larger than
 358          * anything we ever want to print.
 359          */
 360         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 361         va_end(args);
 362
 363         /* Send to desired file */
 364         fputs(file, printbuffer);
 365         return i;
 366 }
 367
 368 /** U-Boot INITIAL CONSOLE-COMPATIBLE FUNCTION *****************************/
 369
 370 int getc(void)
 371 {
 372 #ifdef CONFIG_DISABLE_CONSOLE
 373         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 374                 return 0;
 375 #endif
 376
 377         if (!gd->have_console)
 378                 return 0;
 379
 380         if (gd->flags & GD_FLG_DEVINIT) {
 381                 /* Get from the standard input */
 382                 return fgetc(stdin);
 383         }
 384
 385         /* Send directly to the handler */
 386         return serial_getc();
 387 }
 388
 389 int tstc(void)
 390 {
 391 #ifdef CONFIG_DISABLE_CONSOLE
 392         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 393                 return 0;
 394 #endif
 395
 396         if (!gd->have_console)
 397                 return 0;
 398
 399         if (gd->flags & GD_FLG_DEVINIT) {
 400                 /* Test the standard input */
 401                 return ftstc(stdin);
 402         }
 403
 404         /* Send directly to the handler */
 405         return serial_tstc();
 406 }
 407
 408 #define PRE_CONSOLE_FLUSHPOINT1_SERIAL                  0
 409 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL   1
 410
 411 #ifdef CONFIG_PRE_CONSOLE_BUFFER
 412 #define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
 413
 414 static void pre_console_putc(const char c)
 415 {
 416         char *buffer = (char *)CONFIG_PRE_CON_BUF_ADDR;
 417
 418         buffer[CIRC_BUF_IDX(gd->precon_buf_idx++)] = c;
 419 }
 420
 421 static void pre_console_puts(const char *s)
 422 {
 423         while (*s)
 424                 pre_console_putc(*s++);
 425 }
 426
 427 static void print_pre_console_buffer(int flushpoint)
 428 {
 429         unsigned long in = 0, out = 0;
 430         char *buf_in = (char *)CONFIG_PRE_CON_BUF_ADDR;
 431         char buf_out[CONFIG_PRE_CON_BUF_SZ + 1];
 432
 433         if (gd->precon_buf_idx > CONFIG_PRE_CON_BUF_SZ)
 434                 in = gd->precon_buf_idx - CONFIG_PRE_CON_BUF_SZ;
 435
 436         while (in < gd->precon_buf_idx)
 437                 buf_out[out++] = buf_in[CIRC_BUF_IDX(in++)];
 438
 439         buf_out[out] = 0;
 440
 441         switch (flushpoint) {
 442         case PRE_CONSOLE_FLUSHPOINT1_SERIAL:
 443                 puts(buf_out);
 444                 break;
 445         case PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL:
 446                 console_puts_noserial(stdout, buf_out);
 447                 break;
 448         }
 449 }
 450 #else
 451 static inline void pre_console_putc(const char c) {}
 452 static inline void pre_console_puts(const char *s) {}
 453 static inline void print_pre_console_buffer(int flushpoint) {}
 454 #endif
 455
 456 void putc(const char c)
 457 {
 458 #ifdef CONFIG_SANDBOX
 459         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 460                 os_putc(c);
 461                 return;
 462         }
 463 #endif
 464 #ifdef CONFIG_DEBUG_UART
 465         /* if we don't have a console yet, use the debug UART */
 466         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 467                 printch(c);
 468                 return;
 469         }
 470 #endif
 471 #ifdef CONFIG_SILENT_CONSOLE
 472         if (gd->flags & GD_FLG_SILENT)
 473                 return;
 474 #endif
 475
 476 #ifdef CONFIG_DISABLE_CONSOLE
 477         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 478                 return;
 479 #endif
 480
 481         if (!gd->have_console)
 482                 return pre_console_putc(c);
 483
 484         if (gd->flags & GD_FLG_DEVINIT) {
 485                 /* Send to the standard output */
 486                 fputc(stdout, c);
 487         } else {
 488                 /* Send directly to the handler */
 489                 pre_console_putc(c);
 490                 serial_putc(c);
 491         }
 492 }
 493
 494 void puts(const char *s)
 495 {
 496 #ifdef CONFIG_SANDBOX
 497         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 498                 os_puts(s);
 499                 return;
 500         }
 501 #endif
 502 #ifdef CONFIG_DEBUG_UART
 503         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 504                 while (*s) {
 505                         int ch = *s++;
 506
 507                         printch(ch);
 508                         if (ch == '\n')
 509                                 printch('\r');
 510                 }
 511                 return;
 512         }
 513 #endif
 514 #ifdef CONFIG_SILENT_CONSOLE
 515         if (gd->flags & GD_FLG_SILENT)
 516                 return;
 517 #endif
 518
 519 #ifdef CONFIG_DISABLE_CONSOLE
 520         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 521                 return;
 522 #endif
 523
 524         if (!gd->have_console)
 525                 return pre_console_puts(s);
 526
 527         if (gd->flags & GD_FLG_DEVINIT) {
 528                 /* Send to the standard output */
 529                 fputs(stdout, s);
 530         } else {
 531                 /* Send directly to the handler */
 532                 pre_console_puts(s);
 533                 serial_puts(s);
 534         }
 535 }
 536
 537 int printf(const char *fmt, ...)
 538 {
 539         va_list args;
 540         uint i;
 541         char printbuffer[CONFIG_SYS_PBSIZE];
 542
 543 #if !defined(CONFIG_SANDBOX) && !defined(CONFIG_PRE_CONSOLE_BUFFER)
 544         if (!gd->have_console)
 545                 return 0;
 546 #endif
 547
 548         va_start(args, fmt);
 549
 550         /* For this to work, printbuffer must be larger than
 551          * anything we ever want to print.
 552          */
 553         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 554         va_end(args);
 555
 556         /* Print the string */
 557         puts(printbuffer);
 558         return i;
 559 }
 560
 561 int vprintf(const char *fmt, va_list args)
 562 {
 563         uint i;
 564         char printbuffer[CONFIG_SYS_PBSIZE];
 565
 566 #if defined(CONFIG_PRE_CONSOLE_BUFFER) && !defined(CONFIG_SANDBOX)
 567         if (!gd->have_console)
 568                 return 0;
 569 #endif
 570
 571         /* For this to work, printbuffer must be larger than
 572          * anything we ever want to print.
 573          */
 574         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 575
 576         /* Print the string */
 577         puts(printbuffer);
 578         return i;
 579 }
 580
 581 /* test if ctrl-c was pressed */
 582 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 583 static int ctrlc_was_pressed = 0;
 584 int ctrlc(void)
 585 {
 586 #ifndef CONFIG_SANDBOX
 587         if (!ctrlc_disabled && gd->have_console) {
 588                 if (tstc()) {
 589                         switch (getc()) {
 590                         case 0x03:              /* ^C - Control C */
 591                                 ctrlc_was_pressed = 1;
 592                                 return 1;
 593                         default:
 594                                 break;
 595                         }
 596                 }
 597         }
 598 #endif
 599
 600         return 0;
 601 }
 602 /* Reads user's confirmation.
 603    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 604 */
 605 int confirm_yesno(void)
 606 {
 607         int i;
 608         char str_input[5];
 609
 610         /* Flush input */
 611         while (tstc())
 612                 getc();
 613         i = 0;
 614         while (i < sizeof(str_input)) {
 615                 str_input[i] = getc();
 616                 putc(str_input[i]);
 617                 if (str_input[i] == '\r')
 618                         break;
 619                 i++;
 620         }
 621         putc('\n');
 622         if (strncmp(str_input, "y\r", 2) == 0 ||
 623             strncmp(str_input, "Y\r", 2) == 0 ||
 624             strncmp(str_input, "yes\r", 4) == 0 ||
 625             strncmp(str_input, "YES\r", 4) == 0)
 626                 return 1;
 627         return 0;
 628 }
 629 /* pass 1 to disable ctrlc() checking, 0 to enable.
 630  * returns previous state
 631  */
 632 int disable_ctrlc(int disable)
 633 {
 634         int prev = ctrlc_disabled;      /* save previous state */
 635
 636         ctrlc_disabled = disable;
 637         return prev;
 638 }
 639
 640 int had_ctrlc (void)
 641 {
 642         return ctrlc_was_pressed;
 643 }
 644
 645 void clear_ctrlc(void)
 646 {
 647         ctrlc_was_pressed = 0;
 648 }
 649
 650 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
 651 char    screen[1024];
 652 char *cursor = screen;
 653 int once = 0;
 654 inline void dbg(const char *fmt, ...)
 655 {
 656         va_list args;
 657         uint    i;
 658         char    printbuffer[CONFIG_SYS_PBSIZE];
 659
 660         if (!once) {
 661                 memset(screen, 0, sizeof(screen));
 662                 once++;
 663         }
 664
 665         va_start(args, fmt);
 666
 667         /* For this to work, printbuffer must be larger than
 668          * anything we ever want to print.
 669          */
 670         i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 671         va_end(args);
 672
 673         if ((screen + sizeof(screen) - 1 - cursor)
 674             < strlen(printbuffer) + 1) {
 675                 memset(screen, 0, sizeof(screen));
 676                 cursor = screen;
 677         }
 678         sprintf(cursor, printbuffer);
 679         cursor += strlen(printbuffer);
 680
 681 }
 682 #else
 683 static inline void dbg(const char *fmt, ...)
 684 {
 685 }
 686 #endif
 687
 688 /** U-Boot INIT FUNCTIONS *************************************************/
 689
 690 struct stdio_dev *search_device(int flags, const char *name)
 691 {
 692         struct stdio_dev *dev;
 693
 694         dev = stdio_get_by_name(name);
 695
 696         if (dev && (dev->flags & flags))
 697                 return dev;
 698
 699         return NULL;
 700 }
 701
 702 int console_assign(int file, const char *devname)
 703 {
 704         int flag;
 705         struct stdio_dev *dev;
 706
 707         /* Check for valid file */
 708         switch (file) {
 709         case stdin:
 710                 flag = DEV_FLAGS_INPUT;
 711                 break;
 712         case stdout:
 713         case stderr:
 714                 flag = DEV_FLAGS_OUTPUT;
 715                 break;
 716         default:
 717                 return -1;
 718         }
 719
 720         /* Check for valid device name */
 721
 722         dev = search_device(flag, devname);
 723
 724         if (dev)
 725                 return console_setfile(file, dev);
 726
 727         return -1;
 728 }
 729
 730 /* Called before relocation - use serial functions */
 731 int console_init_f(void)
 732 {
 733         gd->have_console = 1;
 734
 735 #ifdef CONFIG_SILENT_CONSOLE
 736         if (getenv("silent") != NULL)
 737                 gd->flags |= GD_FLG_SILENT;
 738 #endif
 739
 740         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 741
 742         return 0;
 743 }
 744
 745 void stdio_print_current_devices(void)
 746 {
 747         /* Print information */
 748         puts("In:    ");
 749         if (stdio_devices[stdin] == NULL) {
 750                 puts("No input devices available!\n");
 751         } else {
 752                 printf ("%s\n", stdio_devices[stdin]->name);
 753         }
 754
 755         puts("Out:   ");
 756         if (stdio_devices[stdout] == NULL) {
 757                 puts("No output devices available!\n");
 758         } else {
 759                 printf ("%s\n", stdio_devices[stdout]->name);
 760         }
 761
 762         puts("Err:   ");
 763         if (stdio_devices[stderr] == NULL) {
 764                 puts("No error devices available!\n");
 765         } else {
 766                 printf ("%s\n", stdio_devices[stderr]->name);
 767         }
 768 }
 769
 770 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
 771 /* Called after the relocation - use desired console functions */
 772 int console_init_r(void)
 773 {
 774         char *stdinname, *stdoutname, *stderrname;
 775         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 776 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 777         int i;
 778 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 779 #ifdef CONFIG_CONSOLE_MUX
 780         int iomux_err = 0;
 781 #endif
 782
 783         /* set default handlers at first */
 784         gd->jt->getc  = serial_getc;
 785         gd->jt->tstc  = serial_tstc;
 786         gd->jt->putc  = serial_putc;
 787         gd->jt->puts  = serial_puts;
 788         gd->jt->printf = serial_printf;
 789
 790         /* stdin stdout and stderr are in environment */
 791         /* scan for it */
 792         stdinname  = getenv("stdin");
 793         stdoutname = getenv("stdout");
 794         stderrname = getenv("stderr");
 795
 796         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 797                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 798                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 799                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 800 #ifdef CONFIG_CONSOLE_MUX
 801                 iomux_err = iomux_doenv(stdin, stdinname);
 802                 iomux_err += iomux_doenv(stdout, stdoutname);
 803                 iomux_err += iomux_doenv(stderr, stderrname);
 804                 if (!iomux_err)
 805                         /* Successful, so skip all the code below. */
 806                         goto done;
 807 #endif
 808         }
 809         /* if the devices are overwritten or not found, use default device */
 810         if (inputdev == NULL) {
 811                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 812         }
 813         if (outputdev == NULL) {
 814                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 815         }
 816         if (errdev == NULL) {
 817                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 818         }
 819         /* Initializes output console first */
 820         if (outputdev != NULL) {
 821                 /* need to set a console if not done above. */
 822                 console_doenv(stdout, outputdev);
 823         }
 824         if (errdev != NULL) {
 825                 /* need to set a console if not done above. */
 826                 console_doenv(stderr, errdev);
 827         }
 828         if (inputdev != NULL) {
 829                 /* need to set a console if not done above. */
 830                 console_doenv(stdin, inputdev);
 831         }
 832
 833 #ifdef CONFIG_CONSOLE_MUX
 834 done:
 835 #endif
 836
 837 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 838         stdio_print_current_devices();
 839 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 840
 841 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 842         /* set the environment variables (will overwrite previous env settings) */
 843         for (i = 0; i < 3; i++) {
 844                 setenv(stdio_names[i], stdio_devices[i]->name);
 845         }
 846 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 847
 848         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 849
 850 #if 0
 851         /* If nothing usable installed, use only the initial console */
 852         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 853                 return 0;
 854 #endif
 855         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 856         return 0;
 857 }
 858
 859 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
 860
 861 /* Called after the relocation - use desired console functions */
 862 int console_init_r(void)
 863 {
 864         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 865         int i;
 866         struct list_head *list = stdio_get_list();
 867         struct list_head *pos;
 868         struct stdio_dev *dev;
 869
 870 #ifdef CONFIG_SPLASH_SCREEN
 871         /*
 872          * suppress all output if splash screen is enabled and we have
 873          * a bmp to display. We redirect the output from frame buffer
 874          * console to serial console in this case or suppress it if
 875          * "silent" mode was requested.
 876          */
 877         if (getenv("splashimage") != NULL) {
 878                 if (!(gd->flags & GD_FLG_SILENT))
 879                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 880         }
 881 #endif
 882
 883         /* Scan devices looking for input and output devices */
 884         list_for_each(pos, list) {
 885                 dev = list_entry(pos, struct stdio_dev, list);
 886
 887                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 888                         inputdev = dev;
 889                 }
 890                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 891                         outputdev = dev;
 892                 }
 893                 if(inputdev && outputdev)
 894                         break;
 895         }
 896
 897         /* Initializes output console first */
 898         if (outputdev != NULL) {
 899                 console_setfile(stdout, outputdev);
 900                 console_setfile(stderr, outputdev);
 901 #ifdef CONFIG_CONSOLE_MUX
 902                 console_devices[stdout][0] = outputdev;
 903                 console_devices[stderr][0] = outputdev;
 904 #endif
 905         }
 906
 907         /* Initializes input console */
 908         if (inputdev != NULL) {
 909                 console_setfile(stdin, inputdev);
 910 #ifdef CONFIG_CONSOLE_MUX
 911                 console_devices[stdin][0] = inputdev;
 912 #endif
 913         }
 914
 915 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 916         stdio_print_current_devices();
 917 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 918
 919         /* Setting environment variables */
 920         for (i = 0; i < 3; i++) {
 921                 setenv(stdio_names[i], stdio_devices[i]->name);
 922         }
 923
 924         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 925
 926 #if 0
 927         /* If nothing usable installed, use only the initial console */
 928         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 929                 return 0;
 930 #endif
 931         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 932         return 0;
 933 }
 934
 935 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */