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         /* sandbox can send characters to stdout before it has a console */
 460         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 461                 os_putc(c);
 462                 return;
 463         }
 464 #endif
 465 #ifdef CONFIG_DEBUG_UART
 466         /* if we don't have a console yet, use the debug UART */
 467         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 468                 printch(c);
 469                 return;
 470         }
 471 #endif
 472 #ifdef CONFIG_SILENT_CONSOLE
 473         if (gd->flags & GD_FLG_SILENT)
 474                 return;
 475 #endif
 476
 477 #ifdef CONFIG_DISABLE_CONSOLE
 478         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 479                 return;
 480 #endif
 481
 482         if (!gd->have_console)
 483                 return pre_console_putc(c);
 484
 485         if (gd->flags & GD_FLG_DEVINIT) {
 486                 /* Send to the standard output */
 487                 fputc(stdout, c);
 488         } else {
 489                 /* Send directly to the handler */
 490                 pre_console_putc(c);
 491                 serial_putc(c);
 492         }
 493 }
 494
 495 void puts(const char *s)
 496 {
 497 #ifdef CONFIG_SANDBOX
 498         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 499                 os_puts(s);
 500                 return;
 501         }
 502 #endif
 503 #ifdef CONFIG_DEBUG_UART
 504         if (!gd || !(gd->flags & GD_FLG_SERIAL_READY)) {
 505                 while (*s) {
 506                         int ch = *s++;
 507
 508                         printch(ch);
 509                         if (ch == '\n')
 510                                 printch('\r');
 511                 }
 512                 return;
 513         }
 514 #endif
 515 #ifdef CONFIG_SILENT_CONSOLE
 516         if (gd->flags & GD_FLG_SILENT)
 517                 return;
 518 #endif
 519
 520 #ifdef CONFIG_DISABLE_CONSOLE
 521         if (gd->flags & GD_FLG_DISABLE_CONSOLE)
 522                 return;
 523 #endif
 524
 525         if (!gd->have_console)
 526                 return pre_console_puts(s);
 527
 528         if (gd->flags & GD_FLG_DEVINIT) {
 529                 /* Send to the standard output */
 530                 fputs(stdout, s);
 531         } else {
 532                 /* Send directly to the handler */
 533                 pre_console_puts(s);
 534                 serial_puts(s);
 535         }
 536 }
 537
 538 int printf(const char *fmt, ...)
 539 {
 540         va_list args;
 541         uint i;
 542         char printbuffer[CONFIG_SYS_PBSIZE];
 543
 544         va_start(args, fmt);
 545
 546         /* For this to work, printbuffer must be larger than
 547          * anything we ever want to print.
 548          */
 549         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 550         va_end(args);
 551
 552         /* Print the string */
 553         puts(printbuffer);
 554         return i;
 555 }
 556
 557 int vprintf(const char *fmt, va_list args)
 558 {
 559         uint i;
 560         char printbuffer[CONFIG_SYS_PBSIZE];
 561
 562 #if defined(CONFIG_PRE_CONSOLE_BUFFER) && !defined(CONFIG_SANDBOX)
 563         if (!gd->have_console)
 564                 return 0;
 565 #endif
 566
 567         /* For this to work, printbuffer must be larger than
 568          * anything we ever want to print.
 569          */
 570         i = vscnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 571
 572         /* Print the string */
 573         puts(printbuffer);
 574         return i;
 575 }
 576
 577 /* test if ctrl-c was pressed */
 578 static int ctrlc_disabled = 0;  /* see disable_ctrl() */
 579 static int ctrlc_was_pressed = 0;
 580 int ctrlc(void)
 581 {
 582 #ifndef CONFIG_SANDBOX
 583         if (!ctrlc_disabled && gd->have_console) {
 584                 if (tstc()) {
 585                         switch (getc()) {
 586                         case 0x03:              /* ^C - Control C */
 587                                 ctrlc_was_pressed = 1;
 588                                 return 1;
 589                         default:
 590                                 break;
 591                         }
 592                 }
 593         }
 594 #endif
 595
 596         return 0;
 597 }
 598 /* Reads user's confirmation.
 599    Returns 1 if user's input is "y", "Y", "yes" or "YES"
 600 */
 601 int confirm_yesno(void)
 602 {
 603         int i;
 604         char str_input[5];
 605
 606         /* Flush input */
 607         while (tstc())
 608                 getc();
 609         i = 0;
 610         while (i < sizeof(str_input)) {
 611                 str_input[i] = getc();
 612                 putc(str_input[i]);
 613                 if (str_input[i] == '\r')
 614                         break;
 615                 i++;
 616         }
 617         putc('\n');
 618         if (strncmp(str_input, "y\r", 2) == 0 ||
 619             strncmp(str_input, "Y\r", 2) == 0 ||
 620             strncmp(str_input, "yes\r", 4) == 0 ||
 621             strncmp(str_input, "YES\r", 4) == 0)
 622                 return 1;
 623         return 0;
 624 }
 625 /* pass 1 to disable ctrlc() checking, 0 to enable.
 626  * returns previous state
 627  */
 628 int disable_ctrlc(int disable)
 629 {
 630         int prev = ctrlc_disabled;      /* save previous state */
 631
 632         ctrlc_disabled = disable;
 633         return prev;
 634 }
 635
 636 int had_ctrlc (void)
 637 {
 638         return ctrlc_was_pressed;
 639 }
 640
 641 void clear_ctrlc(void)
 642 {
 643         ctrlc_was_pressed = 0;
 644 }
 645
 646 #ifdef CONFIG_MODEM_SUPPORT_DEBUG
 647 char    screen[1024];
 648 char *cursor = screen;
 649 int once = 0;
 650 inline void dbg(const char *fmt, ...)
 651 {
 652         va_list args;
 653         uint    i;
 654         char    printbuffer[CONFIG_SYS_PBSIZE];
 655
 656         if (!once) {
 657                 memset(screen, 0, sizeof(screen));
 658                 once++;
 659         }
 660
 661         va_start(args, fmt);
 662
 663         /* For this to work, printbuffer must be larger than
 664          * anything we ever want to print.
 665          */
 666         i = vsnprintf(printbuffer, sizeof(printbuffer), fmt, args);
 667         va_end(args);
 668
 669         if ((screen + sizeof(screen) - 1 - cursor)
 670             < strlen(printbuffer) + 1) {
 671                 memset(screen, 0, sizeof(screen));
 672                 cursor = screen;
 673         }
 674         sprintf(cursor, printbuffer);
 675         cursor += strlen(printbuffer);
 676
 677 }
 678 #else
 679 static inline void dbg(const char *fmt, ...)
 680 {
 681 }
 682 #endif
 683
 684 /** U-Boot INIT FUNCTIONS *************************************************/
 685
 686 struct stdio_dev *search_device(int flags, const char *name)
 687 {
 688         struct stdio_dev *dev;
 689
 690         dev = stdio_get_by_name(name);
 691
 692         if (dev && (dev->flags & flags))
 693                 return dev;
 694
 695         return NULL;
 696 }
 697
 698 int console_assign(int file, const char *devname)
 699 {
 700         int flag;
 701         struct stdio_dev *dev;
 702
 703         /* Check for valid file */
 704         switch (file) {
 705         case stdin:
 706                 flag = DEV_FLAGS_INPUT;
 707                 break;
 708         case stdout:
 709         case stderr:
 710                 flag = DEV_FLAGS_OUTPUT;
 711                 break;
 712         default:
 713                 return -1;
 714         }
 715
 716         /* Check for valid device name */
 717
 718         dev = search_device(flag, devname);
 719
 720         if (dev)
 721                 return console_setfile(file, dev);
 722
 723         return -1;
 724 }
 725
 726 /* Called before relocation - use serial functions */
 727 int console_init_f(void)
 728 {
 729         gd->have_console = 1;
 730
 731 #ifdef CONFIG_SILENT_CONSOLE
 732         if (getenv("silent") != NULL)
 733                 gd->flags |= GD_FLG_SILENT;
 734 #endif
 735
 736         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT1_SERIAL);
 737
 738         return 0;
 739 }
 740
 741 void stdio_print_current_devices(void)
 742 {
 743         /* Print information */
 744         puts("In:    ");
 745         if (stdio_devices[stdin] == NULL) {
 746                 puts("No input devices available!\n");
 747         } else {
 748                 printf ("%s\n", stdio_devices[stdin]->name);
 749         }
 750
 751         puts("Out:   ");
 752         if (stdio_devices[stdout] == NULL) {
 753                 puts("No output devices available!\n");
 754         } else {
 755                 printf ("%s\n", stdio_devices[stdout]->name);
 756         }
 757
 758         puts("Err:   ");
 759         if (stdio_devices[stderr] == NULL) {
 760                 puts("No error devices available!\n");
 761         } else {
 762                 printf ("%s\n", stdio_devices[stderr]->name);
 763         }
 764 }
 765
 766 #ifdef CONFIG_SYS_CONSOLE_IS_IN_ENV
 767 /* Called after the relocation - use desired console functions */
 768 int console_init_r(void)
 769 {
 770         char *stdinname, *stdoutname, *stderrname;
 771         struct stdio_dev *inputdev = NULL, *outputdev = NULL, *errdev = NULL;
 772 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 773         int i;
 774 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 775 #ifdef CONFIG_CONSOLE_MUX
 776         int iomux_err = 0;
 777 #endif
 778
 779         /* set default handlers at first */
 780         gd->jt->getc  = serial_getc;
 781         gd->jt->tstc  = serial_tstc;
 782         gd->jt->putc  = serial_putc;
 783         gd->jt->puts  = serial_puts;
 784         gd->jt->printf = serial_printf;
 785
 786         /* stdin stdout and stderr are in environment */
 787         /* scan for it */
 788         stdinname  = getenv("stdin");
 789         stdoutname = getenv("stdout");
 790         stderrname = getenv("stderr");
 791
 792         if (OVERWRITE_CONSOLE == 0) {   /* if not overwritten by config switch */
 793                 inputdev  = search_device(DEV_FLAGS_INPUT,  stdinname);
 794                 outputdev = search_device(DEV_FLAGS_OUTPUT, stdoutname);
 795                 errdev    = search_device(DEV_FLAGS_OUTPUT, stderrname);
 796 #ifdef CONFIG_CONSOLE_MUX
 797                 iomux_err = iomux_doenv(stdin, stdinname);
 798                 iomux_err += iomux_doenv(stdout, stdoutname);
 799                 iomux_err += iomux_doenv(stderr, stderrname);
 800                 if (!iomux_err)
 801                         /* Successful, so skip all the code below. */
 802                         goto done;
 803 #endif
 804         }
 805         /* if the devices are overwritten or not found, use default device */
 806         if (inputdev == NULL) {
 807                 inputdev  = search_device(DEV_FLAGS_INPUT,  "serial");
 808         }
 809         if (outputdev == NULL) {
 810                 outputdev = search_device(DEV_FLAGS_OUTPUT, "serial");
 811         }
 812         if (errdev == NULL) {
 813                 errdev    = search_device(DEV_FLAGS_OUTPUT, "serial");
 814         }
 815         /* Initializes output console first */
 816         if (outputdev != NULL) {
 817                 /* need to set a console if not done above. */
 818                 console_doenv(stdout, outputdev);
 819         }
 820         if (errdev != NULL) {
 821                 /* need to set a console if not done above. */
 822                 console_doenv(stderr, errdev);
 823         }
 824         if (inputdev != NULL) {
 825                 /* need to set a console if not done above. */
 826                 console_doenv(stdin, inputdev);
 827         }
 828
 829 #ifdef CONFIG_CONSOLE_MUX
 830 done:
 831 #endif
 832
 833 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 834         stdio_print_current_devices();
 835 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 836
 837 #ifdef CONFIG_SYS_CONSOLE_ENV_OVERWRITE
 838         /* set the environment variables (will overwrite previous env settings) */
 839         for (i = 0; i < 3; i++) {
 840                 setenv(stdio_names[i], stdio_devices[i]->name);
 841         }
 842 #endif /* CONFIG_SYS_CONSOLE_ENV_OVERWRITE */
 843
 844         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 845
 846 #if 0
 847         /* If nothing usable installed, use only the initial console */
 848         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 849                 return 0;
 850 #endif
 851         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 852         return 0;
 853 }
 854
 855 #else /* CONFIG_SYS_CONSOLE_IS_IN_ENV */
 856
 857 /* Called after the relocation - use desired console functions */
 858 int console_init_r(void)
 859 {
 860         struct stdio_dev *inputdev = NULL, *outputdev = NULL;
 861         int i;
 862         struct list_head *list = stdio_get_list();
 863         struct list_head *pos;
 864         struct stdio_dev *dev;
 865
 866 #ifdef CONFIG_SPLASH_SCREEN
 867         /*
 868          * suppress all output if splash screen is enabled and we have
 869          * a bmp to display. We redirect the output from frame buffer
 870          * console to serial console in this case or suppress it if
 871          * "silent" mode was requested.
 872          */
 873         if (getenv("splashimage") != NULL) {
 874                 if (!(gd->flags & GD_FLG_SILENT))
 875                         outputdev = search_device (DEV_FLAGS_OUTPUT, "serial");
 876         }
 877 #endif
 878
 879         /* Scan devices looking for input and output devices */
 880         list_for_each(pos, list) {
 881                 dev = list_entry(pos, struct stdio_dev, list);
 882
 883                 if ((dev->flags & DEV_FLAGS_INPUT) && (inputdev == NULL)) {
 884                         inputdev = dev;
 885                 }
 886                 if ((dev->flags & DEV_FLAGS_OUTPUT) && (outputdev == NULL)) {
 887                         outputdev = dev;
 888                 }
 889                 if(inputdev && outputdev)
 890                         break;
 891         }
 892
 893         /* Initializes output console first */
 894         if (outputdev != NULL) {
 895                 console_setfile(stdout, outputdev);
 896                 console_setfile(stderr, outputdev);
 897 #ifdef CONFIG_CONSOLE_MUX
 898                 console_devices[stdout][0] = outputdev;
 899                 console_devices[stderr][0] = outputdev;
 900 #endif
 901         }
 902
 903         /* Initializes input console */
 904         if (inputdev != NULL) {
 905                 console_setfile(stdin, inputdev);
 906 #ifdef CONFIG_CONSOLE_MUX
 907                 console_devices[stdin][0] = inputdev;
 908 #endif
 909         }
 910
 911 #ifndef CONFIG_SYS_CONSOLE_INFO_QUIET
 912         stdio_print_current_devices();
 913 #endif /* CONFIG_SYS_CONSOLE_INFO_QUIET */
 914
 915         /* Setting environment variables */
 916         for (i = 0; i < 3; i++) {
 917                 setenv(stdio_names[i], stdio_devices[i]->name);
 918         }
 919
 920         gd->flags |= GD_FLG_DEVINIT;    /* device initialization completed */
 921
 922 #if 0
 923         /* If nothing usable installed, use only the initial console */
 924         if ((stdio_devices[stdin] == NULL) && (stdio_devices[stdout] == NULL))
 925                 return 0;
 926 #endif
 927         print_pre_console_buffer(PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL);
 928         return 0;
 929 }
 930
 931 #endif /* CONFIG_SYS_CONSOLE_IS_IN_ENV */