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